JP2010177291A - Method of generating library data for board appearance inspection, and method of generating inspection data - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To generate library data depending on features of components in appearance by a simple operation. <P>SOLUTION: One of components of the same type on a substrate is selected as a representative component based on CAD data, and a screen on which a model image of a region including the representative component is displayed is activated. A display field 102 for a list of a component type icon is provided on this screen. When the component type corresponding to the representative component is selected, a sample image of a sub-component type belonging to the selected component type is displayed on the adjacent display field 108. When a user carries out an operation for selecting the sample image and an operation for adding a component body region W in an image display region 100 to the representative component, an inspection region based on a setting rule of the selected sub-component type is set to the representative component, and displayed. Depending on a definite operation to the display, a setting rule of basic library data that is modified so as to match the displayed inspection region is registered as low-level variation of the selected sub-component type. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a method of creating library data for each component used when teaching inspection data to an inspection apparatus that performs automatic appearance inspection of a component mounting board, and a method of generating inspection data.

  In general, inspection data for substrate appearance inspection is to extract inspection area setting data (indicating the number of inspection areas and the setting position and size of each inspection area), and the inspection site in each inspection area. The binarization threshold value, the logic of the measurement process in each inspection region, the determination reference value, and the like are included. The specific contents of inspection differ depending on the appearance of the parts. Therefore, in the conventional board appearance inspection apparatus, in order to reduce the burden of teaching work, each part of the board to be inspected has a standard called “library data”. The inspection data is applied, and the applied inspection data is adjusted as necessary.

  In the circuit board inspection system provided by the applicant, various parts are classified into multiple parts types based on their respective appearances, and each part type is further subdivided based on the color of the parts and the number of electrodes. Thus, multiple types of “variations” are set and library data is registered in units of variations. In this case, in a general teaching process, a non-defective model of the board to be inspected is imaged, an image of each part is displayed, and the user selects a part type and a variation that match the displayed part. Associate library data with.

  Further, the following Patent Documents 1 and 2 are cited as documents disclosing the invention for the purpose of making it easy to associate library data with each component on the board.

  Patent Document 1 discloses a method for specifying a variation corresponding to each component indicated by board design information using an image of a model of a board to be inspected and board design information of the board. Specifically, in this method, the part located at the coordinate position indicated by the board design information is imaged, the library data of each variation is sequentially applied to the generated image, and the inspected part (part main body and land) is extracted and extracted. The area of a portion where the inspection target region and the inspection region used for the inspection of the region overlap is calculated. Then, the variation having the largest overlap area is specified as corresponding to the component to be processed.

  Further, in Patent Document 1, a component code conversion table in which the name of the specified variation is associated with the component type of the processing target component indicated by the board design information is used to mount various components indicated by the board design information. It is described that library data corresponding to each position can be automatically applied.

  On the other hand, Patent Document 2 specifies the library data corresponding to each component by allowing the user himself / herself to input the appearance information of each component and reading the library data that matches the input appearance information from the database. Is described. In addition, when inputting appearance information, a specific image of the teaching target part and items to be input for the part type corresponding to this part are displayed, and a predetermined number of appearance information options are displayed for each item. It is described that the item corresponding to the displayed part is selected.

Japanese Patent No. 3906780 JP 2008-32525 A

  The library data is set based on the know-how of board inspection experts. If appropriate library data can be associated with each part, the inspection area and inspection parameters based on the applied data can be used for each part. By adjusting according to this, it can set so that a test | inspection with a sufficient precision can be performed.

  However, knowledge and experience are required to select the part type and variation corresponding to each part while referring to the non-defective model image of the board, and to adjust the inspection data set by applying library data. Yes, it is difficult to leave it to beginners.

  In the method of automatically discriminating variations of Patent Document 1, if a binary pattern that does not sufficiently reflect the original appearance characteristics is generated by the binarization process, there is a possibility that the variation cannot be correctly specified. For example, in the case of chip resistance and the like, there is a considerable variation in the ratio of electrodes in the entire part in manufacturing, but it is almost unnecessary to consider this variation in specifying the variation. However, in the method of Patent Document 1, since the component main body part excluding the electrode portion is extracted by binarization and compared with the inspection area, if the ratio of the electrode in the entire part increases, the component main body part with respect to the inspection area increases. There is a possibility that the degree of coincidence decreases and the variation cannot be specified correctly.

  In addition, variations are set for chip parts based on the difference in color of the component body. However, in the binarization process of the component body, the area extracted by binarization is reduced due to the influence of the print pattern on the body surface. There is. In such a case, the overlapping area between the inspection area for the component main body and the component main body extracted by binarization is reduced by matching with a suitable variation, and there is a possibility that an error occurs in specifying the variation.

  In the method according to Patent Document 2, the user specifies the appearance of a component, a solder portion, or the like with reference to an image display of an actual component, but the contents of this type of input may vary depending on the user's subjectivity. Also, if a subtle difference in color is determined for a soldered part or the like, the load on the user increases.

  In the present invention, in consideration of the above-mentioned problems, library data corresponding to the appearance characteristics of individual parts can be created by a simple operation. It is an object to make it possible to create inspection data easily and appropriately.

  In the library data creation method of the present invention, a predetermined number of sub-parts are determined based on the difference in appearance that affects each of the inspection parameters. Subdividing into product types, setting basic library data that associates inspection area setting rules with inspection parameters applied to each inspection area for each sub-part type, and the hierarchical relationship between each part type and each sub-part type The basic library data of each sub-part type is registered in the computer. In this computer, the following steps A, B, C, D, E, and F are executed.

  In step A, board design information indicating the type and mounting position of each component to be mounted and the orientation of the component, and an image of a non-defective board manufactured based on this board design information are input. In step B, based on the board design information, one of the parts having the same model name mounted on the non-defective board is selected as a representative part, and an image of the non-defective board on which the representative part is identified and displayed Displayed with a list of schematic diagrams for each component type. It should be noted that the display for identifying the representative component includes processing for displaying only the representative component as the displayed component.

  In Step C, an operation for selecting any one of the component types displayed as the schematic diagram is accepted, and a list of sample images that schematically illustrate the appearance characteristics of the sub-component types belonging to the selected component type is displayed. Display in parallel with the board image. In Step D, an operation for designating a range corresponding to the representative component in the image display area of the non-defective substrate is accepted.

  In step E, an operation for selecting any one of the sub-part types displayed as the sample image is accepted, and the range specified in step D based on the inspection area setting rule for the selected sub-part type. A predetermined number of inspection areas are set so as to match the orientation of the representative part.

  In step F, the inspection area set in step E is displayed overlaid on the image display area. When a confirmation operation is performed after this display, the basic library data of the selected sub-part type is displayed during the confirmation operation. The data corrected based on the inspection area is stored as the library data of the variation of the sub-part type in association with the model name of the representative part.

  In the above method, a plurality of sub-part types are set in advance for each part type based on possible differences such as the color of the part main body and the shape of the electrode, and basic library data is created for each sub-part type. However, the “basic library data for each sub-component type” here does not necessarily need to be independent for each sub-component type, and information that can be set in common for sub-component types within the same component type It may be shared as basic library data of component types, and only information different from other sub component types may be set for each sub component type.

  According to the above method, the user collates the image of the representative part of the model name to be processed with a list of schematic diagrams of each part type and a list of sample images of the sub-part types, so that the part corresponding to the representative part The type and sub-part type can be easily selected. In addition, the range corresponding to the representative part can be easily specified by the range specifying operation for the image of the representative part.

  By accepting each operation described above, the computer applies a set rule included in the basic library data of the sub-part type selected by the user according to the range corresponding to the representative part and the orientation of the representative part. The inspection areas are set, and these inspection areas are displayed superimposed on the image of the representative part. Furthermore, when the user determines that the inspection area is appropriate by this display and performs a confirming operation, the library data of the selected sub-part type is modified so that it matches the inspection area at the confirming operation. Library data is stored in association with the model name of the part.

  According to the above, for each part type, library data can be easily obtained by selecting an appropriate sub-part type suitable for that type or inputting an external feature that is not defined for the sub-part type. Can be created. In addition, since the registered library data is associated with the model name of the part to which the library data is applied, it is possible to automatically associate with the board design information using this format name.

  Next, in a preferred embodiment of the above method, in step E, when the number of electrodes and the sub-component type of a plurality of types of electrode arrangements with respect to the component body are selected, the number of electrodes of the representative component and After executing the step of accepting input regarding the arrangement state of the electrodes, the inspection area for the selected sub-component type is set in accordance with the input content, and the inspection area for the electrode and solder inspection is set.

  According to the above aspect, library data for setting an inspection region according to the number of electrodes of an actual part and the arrangement of the electrodes can be easily created for parts having lead electrodes such as IC and SOP. Can do.

  In another preferred embodiment, in step A, an image before the non-defective board component is mounted is further input. Further, in step E, from the image before the component is mounted based on the range of the representative component specified in step C, the orientation of the representative component, and the setting rule of the inspection area for solder inspection of the selected sub-component type. The land corresponding to the representative part is extracted. Furthermore, the inspection area for solder inspection based on the setting rule is adjusted so as to match the extracted land.

  According to said aspect, based on the land extracted from the image of the board | substrate before actual component mounting, the test | inspection area for solder inspection is adjusted, The library data containing the setting rule according to the test | inspection area after adjustment It becomes possible to create. Therefore, even in the inspection data created by applying this library data to an actual board, the accuracy of setting the inspection area for solder inspection in the range corresponding to the land of the board is increased, and the frequency of correcting the inspection data is reduced. be able to.

  Further, according to the present invention, after executing the above steps A to F, all the components registered in the board design information by the model name associated with the new library data stored in step F are included in the respective components. By executing the step G in which the library data is applied in accordance with the position and orientation, inspection data for each mounted component can be easily created.

  As described above, in the present invention, for each part of the same model, an image of a representative part is displayed together with a schematic diagram list of part types and a list of sample images of sub part types, and the sub part type most suitable for the model is displayed. The user can select easily. Appearance features that are not defined for the selected sub-part type can also be entered appropriately with simple operations, so even users who are not used to setting inspection data are suitable for the parts to be mounted. Library data can be easily created.

  In addition, since the model name is associated with the library data created in the present invention, the library data can be applied to the corresponding part in the board design information based on the model name. In addition, since this library data has already been adjusted for inspection area setting rules in accordance with the image of the actual part, adjustment of the inspection area for each part can be made unnecessary or simple, and inspection data It becomes possible to create efficiently.

It is a figure which shows the structure of a board | substrate external appearance inspection apparatus with the relationship with the computer for test | inspection data creation. It is a figure which shows the basic setting screen which an inspection data creation system presents. It is a figure which shows the example of a display after changing selection of a component type icon about a basic setting screen. It is a figure which shows the example of a display of the initial state of the creation screen of a variation. It is a figure which shows the creation screen when adjusting a component main body area | region. It is a figure which shows the creation screen when selection of a sub component type is changed. It is a figure which shows the state switched to the setting display of a test | inspection area | region. It is a figure which shows a creation screen when the model of a process target is changed. It is a figure which shows the creation screen when adjusting a component main body area | region. It is a figure which shows the creation screen when selection of a component type is changed. It is a figure which shows the creation screen when the input of the number of electrodes is completed. It is a figure which shows the state switched to the setting display of a test | inspection area | region. It is a figure which shows the state by which the window for confirmation of the existing variation was displayed. It is a flowchart which shows the basic process sequence of a test | inspection data creation system. It is a flowchart which shows the detailed process sequence regarding the creation process of a variation.

  FIG. 1 shows a main configuration of an inspection apparatus 1 that performs an automatic appearance inspection of a component mounting board, together with a personal computer 7 connected to the inspection apparatus 1.

  The inspection apparatus 1 according to this embodiment is for performing an inspection on a substrate S of a finished product manufactured by a solder printing process, a component mounting process, and a reflow process. , The illumination unit 3, the substrate stage 4, and the control processing unit 5.

  The substrate stage 4 is provided with a table unit 41 for supporting the substrate S, a moving mechanism 42 for moving the table unit 41 in the X and Y axial directions, and the like. The camera 2 is arranged above the substrate stage 4 with the imaging surface facing downward and the optical axis aligned with the vertical direction.

  The illumination unit 3 includes annular light sources 3R, 3G, and 3B that emit red, green, and blue color lights, respectively, and are disposed between the substrate stage 4 and the camera 3. Each of the light sources 3R, 3G, and 3B has a different diameter, and is disposed in a state in which each central portion is aligned with the optical axis of the camera 2. Thereby, since each light of red, green, and blue is irradiated to the board | substrate S from the direction where an elevation angle differs, the inclination state of highly specular reflective parts, such as a solder fillet and a lead electrode, is shown for each illumination light. An image expressed by a color pattern can be generated.

  The control processing unit 5 includes a computer control unit 50, an image input unit 51, an imaging control unit 52, an illumination control unit 53, an XY stage control unit 54, a memory 55, a display unit 56, an input unit 57, and a communication interface 58. Etc. are provided.

  The image input unit 51 includes an A / D conversion circuit for digitally converting an image from the camera 2. The imaging control unit 52 outputs a timing signal for instructing imaging to the camera 2, and the illumination control unit 53 controls the on / off operation and the light amount of each of the light sources 3R, 3G, and 3B. The XY stage controller 54 controls the movement timing of the substrate stage 4 and the movement amount in the X and Y axial directions.

  The memory 55 stores a program describing a series of processing procedures for executing an inspection and a database for storing inspection data (hereinafter referred to as “inspection database”). In the inspection database, for each component mounted on the substrate S to be inspected, the position and size of the inspection area to be set, the binarized threshold value for detecting the color of the part to be inspected in each inspection area, A plurality of types of inspection data such as determination logic and determination reference values for determining the suitability of the measurement value (mainly area) of the region to be inspected are set.

  In the present specification, among the above inspection data, the binarized threshold value for extracting the color of the part to be inspected is referred to as “color parameter”, and the determination logic and the determination reference value are collectively referred to as “inspection reference data”. . Further, the color parameters and the inspection reference data may be collectively referred to as “inspection parameters”.

  The inspection database further stores data related to the assignment of the field of view of the camera 2 to the substrate S. Based on this data, the control unit 50 controls the movement of the substrate stage 4 via the XY stage control unit 54, thereby aligning the camera 2 with the assigned imaging target region in order and performing imaging. A color image generated by imaging every hour is input to the control unit 50 via the image input unit 51 and stored in an internal memory (such as a RAM). The control unit 50 pays attention to the components in the image stored in the internal memory in order, and sequentially sets the inspection area, binarization, measurement, and pass / fail judgment processing for the target component based on the inspection data. Execute.

  The control unit 50 is connected to the personal computer 7 in the figure and a host device (not shown) via the communication interface 58 and the communication line 6. Each time the inspection of one substrate S is completed, the control unit 50 outputs the inspection result for the substrate S, the image used for the inspection, and the like to the host device. In addition, the inspection result and the image are also displayed on the display unit 56.

  The personal computer 7 of this embodiment incorporates a system (hereinafter referred to as “inspection data creation system” or simply “system”) for creating inspection data used in the above-described inspection apparatus. In this inspection data creation system, hierarchical structure data in which sub-part types are associated with a plurality of part types is registered. The component type is set by classifying the appearance of various components that can be assumed mainly by the difference in the shape of the component body. The sub component type is set by subdividing each component type based on differences in the color of the component, the shape of the electrode, and the like.

  Further, for each component type, a basic setting rule of an inspection area suitable for the component type is registered. Each sub-part type is registered with basic library data including link information to the setting rule for the inspection region of the upper part type and inspection parameters corresponding to the appearance characteristics of the sub-part type.

  In this inspection data creation system, a non-defective model image of the substrate S (hereinafter referred to as “model image”) and CAD data of the substrate S are input, and the CAD data is input using these input information and the basic library data. For each part type represented by the data, specify a sub-part type suitable for that type, and use the inspection parameters linked to the specified sub-part type, and use the library data of the variation corresponding to that type (hereinafter, Simply create a "variation") and register it (this process is not required for models for which variations are already registered). When the registration process ends, each part indicated by the CAD data is applied with a variation corresponding to its model to create inspection data for each part.

  Further, the inspection data creation system is provided with a function of executing a test inspection on a model image using the generated inspection data, a function of correcting inspection data of a part determined to be defective in this inspection, and the like. Also, image data related to user interface settings, such as component type icons and sample images described later, are also registered in the system.

  The inspection data completed by each function described above is transmitted to the inspection apparatus 1 and stored in the inspection database in the memory 55. However, it is also possible to introduce the inspection data creation system into the inspection apparatus 1 and perform a teaching operation directly on the inspection apparatus 1.

  Hereinafter, the process of creating a variation used for creating inspection data will be described focusing on the function of the user interface.

  2 to 12 show screens presented on the monitor 17 (shown in FIG. 1) in the order of presentation when the examination data input system performs variation creation processing. 2 is a basic setting screen before proceeding to the variation creation screen, and an image display area 100 for displaying a model image is provided on the left side of the screen. On the right side, a processing area 101 for allowing the user to proceed with the processing is provided.

  In the processing area 101, four tabs of “part registration”, “inspection standard”, “test running”, and “inspection image” are provided, and a display for processing corresponding to the selected tab is developed. When the variation creation process is performed, the “part registration” tab is selected. In the processing area 101 at this time, a component type icon display column 102, a component type hierarchical structure display column 103, a CAD data read button 104, an automatic paste button 105, and the like are displayed.

  One component type icon is set for each registered component type. Each component type icon is configured as a mark that schematically represents the appearance common to the components of the corresponding component type. The display column 103 displays the hierarchical structure of the component type corresponding to the selected icon. In the initial state, the icon at the top left is automatically selected. However, as shown in FIG. 3, when the selection of the icon is changed, the display of the hierarchical structure in the display column 103 is also changed accordingly.

  A substrate unregistered list 106 is displayed below the processing area 101, and an all pasting button 107 is provided below the list.

  The board unregistered list 106 is a list in which parts for which variations are not registered are ordered in such a way that parts of the same type continue. In this embodiment, the part number name (corresponding to the part model name) read from the CAD data, the part ID (identification code set uniquely for each part), and the coordinates representing the mounting position. An angle representing the orientation of the part is displayed. This list display is performed in response to the reading of CAD data in accordance with the operation of the read button 104.

  The all paste button 107 is for associating each part indicated by the read CAD data with a variation corresponding to each part type. If unregistered parts are displayed in the board unregistered list 106, it is necessary to first create and register variations of these parts and then operate the all paste button 107.

  In the image display area 100 shown in FIG. 2, a range including a part (fourth part in the illustrated example) selected in the board unregistered list 106 in the model image of the board after component mounting is displayed. In this image, two types of inspection areas W and R are displayed in different colors (in the figure, each area W and R is represented by a one-dot chain line and a dotted line in place of the color).

The inspection area W indicates a range corresponding to the main part of the component. Hereinafter, this inspection area W is referred to as “component body area W”.
The component main body region W is used as a reference for setting another inspection region, and a triangular mark M is set on one side of a rectangular frame representing the range. The user can recognize the orientation of the component depending on which direction the mark M is facing. For example, if the mark M is facing right, the orientation of the component is 0 degree, and if the mark M is facing upward, the orientation of the component is 90 degrees. The orientation of the component main body area W is set based on the orientation of the component indicated by the CAD data.

The inspection region R is used for a specific inspection. The number, size, shape, and setting position of the inspection region R are determined according to the appearance characteristics for each component type.
Each of the inspection areas W and R is set for the selected part based on the setting rule for the part type selected in the processing area 101, but the current setting does not match the selected part. .

  Here, when the component type icon of the component type (chip component) corresponding to the selected component is operated, the component main body region W changes to that based on the setting rule for the chip component as shown in FIG. The region R changes to four inspection regions R1 to R4. However, since the inspection areas W and R1 to R4 at this stage are also based on the default size registered in the component type, they are not suitable for the component being displayed.

  In this embodiment, the user operates the automatic paste button 105 here. This operation instructs the start of variation creation processing. When this operation is performed, a variation creation screen as shown in FIG. 4 is launched.

  Also on this screen, an image display area 100 and a display column 102 for component type icons are provided. In this display field 102, selection when the automatic paste button 105 is operated is maintained.

  Further, on the right hand side of the display field 102, a display field 108 for a sample image of the sub-part type is provided. In this screen, each sample image is presented with the name “sample part” so that the user can easily recognize it.

  Each sample image is a schematic representation of the appearance characteristics of the corresponding sub-component type, and the display column 108 includes eight types of samples belonging to the component type (chip component) selected in the component type icon display column 102. An image is displayed. These sample images also have icon functions.

  Further, in the display field 109 at the upper right of the screen, the part name and part number name of the model being selected, and attribute information of the selected part type and sub part type are displayed, and the selected sample image is displayed on the side. (The icon function is not set in this image.)

  In the display field 110 with the heading “Number of lands” at the lower right of the screen, sample images of the selected sub-component type are displayed. (Omitted) is provided. However, since this input box is enabled only when a component type having a lead electrode is selected, it is indicated by a dotted line in FIG.

  Further, a button 111 with an arrow in the display column 110 is used to change the definition of the direction of the part based on the CAD data from the definition of the inspection data. Recognized as a window for changing the orientation.

  Further, below the display column 110, an execution button 112, a return button 113 to the previous screen, and a cancel button 114 are provided. Below the image display area 100, a display magnification setting area 115, buttons 116 and 117 for switching the selection of components, and the like are provided.

  When this variation creation screen is launched, one of the types of parts selected in the board unregistered list 106 when the automatic paste button 105 is operated is selected as a representative part (FIG. 2). , 3 is another part of the same type as the part selected on the screen of 3), and an image of a range including this part is displayed in the image display area 100. In addition, a component main body area W is superimposed on the selected component.

  If the state of the image on the representative screen is not good, the representative part can be switched by operating the selection button 116 in the “same part number” field at the lower left of the screen. Further, by operating the selection button 117 in the column of “Separate product number” next to it, it is possible to change the part type to be processed. Further, the part type icon in the display field 102 can be selected again on the screen at this stage.

  On the screen having the above configuration, the user first performs an operation of correcting the component main body region W to a size suitable for the representative component in the image display region 100. FIG. 5 shows a state where this operation is performed with the display magnification of the image display area 100 increased.

  In the display column 108 of the sub-part type sample image, the one at the left end of the first column is automatically selected in the initial stage. Since the appearance of this sample image is different from that of the representative component, the user performs an operation of switching the selection to a sample image whose color and shape of the component main body portion are close to the representative component. FIG. 6 shows the screen after this switching operation, and the selection has been changed to the leftmost sample image in the second column of the display field 108. In accordance with this change, the sample image in the upper right of the screen and the display column 110 also changes, and the attribute information of the sub-component type in the display column 109 has also changed.

  Here, when the user determines that the attribute information of the sample image and the display field 109 is appropriate and operates the execution button 112, the screen is switched to the one shown in FIG. In this screen, four inspection areas R1, R2, R3, and R4 are added in the image display area 100. On the right side of the screen, the display columns 102 and 108 for the component type and sub-component type are eliminated, and instead, a display column 118 representing the configuration of the inspection area is provided. In addition, a display area of an inspection area editing icon 120 is provided in the lower left of the screen, and a button 119 for “confirm existing variation” is provided in the lower right.

The inspection areas R1 to R4 displayed in the image display area 100 have the same function as that shown in FIG. 3, but the position and size are adjusted in accordance with the size of the component main body area W. Yes. Among these, R1 and R2 are inspection areas for solder inspection and correspond to “Land 1” and “Land 2” in the display column 118. R3 is an inspection area for inspecting the presence / absence of a component, and corresponds to “mounting 1” in the display column 118. R4 indicates a target range of processing for extracting a high luminance area corresponding to solder in order to finely adjust the positions of the inspection areas R1 and R2, and corresponds to “automatic extraction 1” in the display column 118. To do.
The “component body” shown at the top of the display column 118 corresponds to the component body region W.

  For these inspection areas R1 to R4, the inspection area setting rule linked to the selected sub-part type is applied to the range of the part main body area W corrected by the user's operation and the direction of the part indicated by the mark M. In this embodiment, in order to reduce the frequency of correction of inspection data, the inspection areas R1 and R2 for solder inspection are adjusted using a model image before component mounting.

  Briefly, lands corresponding to the left and right electrodes of the representative component are extracted from the range corresponding to the representative component of the model image of the board before component mounting (for example, the area R4 for automatic extraction is used). Then, the positions and sizes of the inspection areas R1 and R2 are adjusted so that each land is included in the inspection areas R1 and R2.

  The color parameters and inspection reference data set for each region in the basic library data of the sub-part type being selected are applied to the inspection regions R1 to R4. In the inspection area R3 for component inspection, the color of the component main body is extracted. By selecting a sub-component type close to the actual color of the component, the color parameter for component extraction set for this sub-component type is selected. This can be applied to the inspection region R3. In addition, the area and shape of the electrode on the peripheral surface of the component that is not the subject of imaging differ between the resistor and the capacitor, and this leads to different solder wetting, but the corner of the capacitor is rounded. The sub-part types can be classified according to the shape. Therefore, by selecting a sub component type whose corner shape is close to the actual component, inspection reference data suitable for the shape of the solder fillet of the component type to be processed is set in the inspection regions R1 and R2 for solder inspection. be able to.

  When the user determines that the settings of the inspection regions R1 to R4 are appropriate, the user operates the execution button 112 again. When this operation is performed, a new variation having the product number name of the model to be processed as a variation name is set below the selected component type. In this variation, the basic library data setting rule is modified and applied so that each inspection region R1 to R4 is set in the state of FIG. On the other hand, as a general rule, the contents of the basic library data are applied as they are to the color parameters and inspection reference data of each inspection area.

  Next, when the creation / registration of the variation for the chip part displayed in the above procedure is completed, as shown in FIG. 8, the display in the image display area 100 is a range including the representative part of the next unregistered type. Can be switched to. Also, the right side of the screen returns to the initial state, and the component type icon and the sample image are displayed again. At this point, the selection for the previous model is left. In addition, although the component main body area W is displayed in the image display area 100, the size of the area W is also based on the previous setting.

  However, in the example of FIG. 8, it is not the chip part but the lead part that is selected as the representative part. For this reason, first, as shown in FIG. 9, the user performs an operation of matching the component main body region W with the representative component. In the system of this embodiment, the component main body region W for the lead component is defined so as to target only the package portion without including the electrode portion, so that the operation by the user is also performed according to this definition.

  Next, when the user selects a part type icon (SOP) corresponding to the representative part in the display field 102, the display in the display field 108 is switched as shown in FIG. In the current display column 108, sample images of two types of sub-part types classified based on the difference in electrode shape are displayed, and the first sub-part type is automatically selected. Further, the display of the sample image in the upper right of the screen and in the display column 100 is also updated in accordance with the change in the display column 108. In addition, the display of the attribute information of the component type and sub-component type in the display field 109 is also updated to a display corresponding to the selected item.

  Furthermore, on the setting screen this time, the electrode input box in the display column 110 is validated, and the default number of electrodes (the number of electrodes indicated by the sample image) is displayed in each box.

  In this embodiment, since the sub-part type selected first corresponds to the representative part, no operation for changing the selection of the sub-part type is performed, but the numerical value in each input box is changed to the actual representative type. It is necessary to set so as to match the number of electrodes of the part. FIG. 11 shows a setting screen when this input is performed, and the numerical values in the upper and lower input boxes are changed from “4” to “7”.

  When the user operates the execution button 112 after this input, the screen is changed to that shown in FIG. This screen has the same configuration as that of FIG. 7, and an inspection area based on the setting rule for the inspection area of the selected sub-part type is additionally displayed in the image display area 100, and the display field 118 on the right side of the screen is displayed. The configuration of the inspection area is displayed.

  Specifically, four inspection regions R11, R12, R13, and R14 are set in the image display region 100 in the example of FIG. These represent the target range of the process of extracting the electrodes, and correspond to “IC automatic extraction” in the display field 118. These inspection area setting rules are set such that the inspection area setting range is divided with up to four electrodes as one unit. Further, although not shown in this figure, in the parts of this embodiment, individual inspection regions are set for each individual electrode and soldering part in each of the inspection regions R11 to R14. Furthermore, each inspection area is associated with a color parameter and inspection reference data defined by the currently selected sub-part type.

  The inspection areas R11 to R14 are also set by applying the inspection area setting rule based on the selected sub-component type in the range of the component main body area W with respect to the representative part and the direction indicated by the mark M. In this case, the land corresponding to the representative component is extracted from the model image of the substrate before mounting, and the electrode of the representative component is extracted from the model image of the substrate after mounting. And each inspection area for electrode inspection is adjusted.

  As described above, even when a lead component is a processing target, various inspection areas are automatically set by performing an operation of inputting the number of electrodes in addition to the setting operation similar to the chip component, and the setting result is Is displayed. When the user determines that this display content is appropriate and operates the execute button 112, a new variation having the part number of the model to be processed as the variation name is set below the selected part type.

  As described above, in this embodiment, the sub-part type corresponding to the processing target model is specified by accepting an operation for selecting a sub-part type similar in appearance to the part of the model whose variation is to be created. Also, by letting the user refer to the image of the representative part and input the appearance features (part body size, number of electrodes) that are not defined for the sub part type, the setting rule for the inspection area of the sub part type Modify (according to the size and number of areas) according to the model to be processed, and create a new variation. As described above, the process of selecting the sub-part type and inputting the features of the appearance can be easily performed while referring to the image display, so even users who are unfamiliar with the setting process can select library data suitable for the model to be processed. Can be set easily.

Furthermore, the following functions are also provided on the above-described variation creation screen.
First, after setting the inspection area, the position and size of the inspection area displayed in the image display area 100 are adjusted using the icon 120 (see FIGS. 7 and 12) displayed at the lower left of the screen, and a copy operation is performed. It is possible to perform editing operations such as increasing the inspection area by deleting or pasting or deleting the inspection area. As a result, the user can operate the execution button 112 after adjusting the inspection area that has been automatically set in more detail or changing the setting contents.

  Next, when the definition of the orientation of the component by CAD data does not conform to the inspection area setting rule, for example, the orientation of the component defined as 90 degrees in the setting rule is 0 degree on the CAD data side. In this case, the operation button 111 set in the display field 100 is operated. Each time this button 111 is operated, the direction of the component main body region W is rotated by 90 degrees. Therefore, by performing the necessary number of operations, the orientation of the component main body area W can be matched with the definition on the system side, and the inspection area setting rules are correctly applied based on the changed component main body area W. Can do.

  Furthermore, by operating a button 119 (see FIGS. 7 and 12) provided at the lower right of the screen after setting the inspection area, it is possible to refer to the already registered variation parts. Library data can be used for the model to be processed.

  FIG. 13 shows a display example when the button 119 is operated on the screen of FIG. In this example, a window 200 for confirming an existing variation is overlaid on the original screen.

  The window 200 is provided with a display column 201 for component type icons and a display column 202 indicating the hierarchical structure of the component types selected in the display column 201. In the display column 201, the icon of the selected chip component is selected, and in the display column 202, one of the variations in the selected sub component type is selected.

  Further, the window 200 displays a column 203 for displaying the attribute information of the selected sub component type, and a thumbnail image 204 of the component corresponding to the variation selected in the display column. The thumbnail image 204 is an image of a representative part when a corresponding variation is created. Furthermore, a “Divert” designation button 205 and a return button 206 are provided below the display field of the thumbnail image 204.

  In the window 200 configured as described above, the user can freely switch the selection of variations. If the return button 206 is operated, the confirmation of the existing variation can be finished and the window 200 can be closed. In accordance with these switching operations, the display of the thumbnail image 204 and the display field 203 is also switched.

  Since the window 200 is set to a range that does not hide the image display area 100 of the original screen, the user compares the representative part in the image display area 100 with the thumbnail image to determine whether the appearances of both are similar. Can be judged. When the user determines that the two are similar and operates the “Divert” button 205, the inspection parameter of the library data of the variation selected in the window 200 at the time of the operation is diverted to the type to be processed. At this time, the window 200 disappears, and the library data including the inspection parameters diverted to the new variation is registered by operating the execution button 112.

  The flowchart of FIG. 14 shows a basic processing procedure by the inspection data creation system. In addition, the flowchart of FIG. 15 shows detailed procedures related to creation of variations (ST4 in FIG. 14) including processing executed by the user (steps described as (user) at the end).

  First, referring to FIG. 14, in the system, a model image after mounting a teaching target board and a model image before mounting are sequentially input from the inspection apparatus 1 (ST1, 2). As a result, the screen shown in FIG.

  Next, CAD data to be taught is read according to the operation of the CAD read button 104 (ST3), and variation creation processing is started for a model for which no variation is registered (ST4). This process will be described with reference to FIG.

  This process is started in response to an operation for selecting one of the components displayed in the board unregistered list 106. First, the type of the selected component is selected as the first processing target (ST101). Next, a representative part is selected from the types of parts to be processed, and an image in a range including the representative part is displayed (ST102). As shown in FIGS. 4 to 12, the representative part is positioned near the center of the image display area 100 and is identified and displayed by the part main body area W, so that the user can easily confirm it.

  Next, the user performs an operation of selecting a component type corresponding to the displayed representative component (ST103). In response to this, the system displays a sample image of the sub component type belonging to the selected component type in the display column 108 (ST104).

  When the sample image of the component type is displayed, the user sequentially performs the operation of adjusting the component main body region W (ST105), the operation of selecting the sub-component type (ST106), and the operation of inputting the number of electrodes (ST107). Then, the execution button 112 is operated (ST108). In response to this, the system applies the inspection region setting rule of the selected sub-component type to the component main body region W to set the inspection region (ST109). Further, lands are extracted from the model image before component mounting (for lead components, processing for extracting electrodes from the model image after component mounting is also executed), and the inspection area is adjusted according to the extraction result (ST110). .

  After this, the adjusted inspection area is displayed in the image display area 100 (ST111), and in accordance with the operation of the execution button 112 by the user, the displayed inspection area setting rule and the inspection parameter of the selected sub-part type are displayed. A new variation combining the above is created (ST114). Further, the new variation is registered with the part number of the model being selected (ST115).

  Thereafter, by selecting the unprocessed model in order and repeating the same procedure until the same process is no longer displayed on the unregistered substrate list, variations corresponding to all the models included in the CAD data are created and registered. be able to.

Of the steps executed by the user, ST105 and ST106 may be reversed in order or may be executed repeatedly. Also, as shown in the examples of FIGS. 2 and 3, when the type of part is selected for the first model to be processed before launching the variation creation screen, ST103 for this model is skipped. Good.
Further, before the process of operating the first execution button 112 (ST108), the direction of the component main body region W can be changed by operating the button 111 in the display column 110.

  When all the unprocessed types are processed (ST115 is “NO”), the variation creation screen disappears and the display returns to the basic setting screen (FIGS. 2 and 3).

  The process after the end of the variation creation process will be described with reference back to ST5 in FIG. Here, according to the user's operation of the all paste button 107, a variation based on the part number of the part is applied to each part in the CAD data according to the mounting position and the direction of the part. Thereby, for each component mounted on the substrate S, the specific setting data of the inspection area (for example, the coordinates of the upper left vertex and the lower right vertex of the inspection area) and the inspection parameters applied to each inspection area are associated with each other. Inspection data is created.

  In this embodiment, for each model, a variation is registered in which the product name representing the model is a variation name. In ST5, the product number represented by the CAD data is converted into a variation name as in the prior art. Therefore, it is possible to easily read out variations corresponding to each part.

  After the inspection data is created, a test inspection is performed using the created inspection data (ST6), and inspection is performed on the inspection area for solder inspection including the inspection item determined to be defective for each part number name. The area setting data is adjusted (ST7). Further, the test inspection is executed again (ST8), and the color parameters and the inspection reference data corresponding to the inspection area where the defect is determined are adjusted for each part determined to be defective (ST9).

  The test inspections of ST6 and ST8 are for model images of boards after component mounting, and the “test running” tab (see FIGS. 2 and 3) in the processing area 101 is selected and necessary designation operations are performed. Is executed. The adjustment process in ST7 is executed by selecting the “inspection image” tab in the processing area 101, and an automatic adjustment process using the model image of the board before component mounting (extracting the land by extracting the land from the model image) In addition to the process of adapting the inspection area to the land obtained, adjustment by manual operation by the user can be performed.

  The adjustment process of ST9 is executed by selecting the “inspection standard” tab in the processing area 101. Here too, a method for automatically adjusting color parameters and inspection reference data by processing an image of an adjustment target area in a model image after component mounting and a method for adjusting manually by a user are selected. Can do.

DESCRIPTION OF SYMBOLS 1 Inspection apparatus 2 Camera 7 Personal computer 17 Monitor 100 Image display area 102 Display column of component type icon 108 Display column of sample image of sub-component type W Component main body region R, R1, R2, R3, R4, R11, R12, R13 , R14 Inspection area

Claims (4)

A method of creating, using a computer, library data that is applied to each component to be inspected when teaching inspection data to an appearance inspection apparatus for a component mounting board,
Subpart types are subdivided into a predetermined number of subpart types based on differences in appearance that affect the inspection parameters. Basic library data that associates inspection area setting rules with inspection parameters to be applied to each inspection area is set for each layer, and the hierarchical relationship between each part type and each sub part type, and basic library data for each sub part type Are registered in the computer,
Step A for inputting the board design information indicating the type and mounting position of each component to be mounted and the orientation of the component, and an image of a non-defective board manufactured based on the board design information,
Based on the board design information, one of the parts having the same model name mounted on the non-defective board is selected as a representative part, and an image of the non-defective board on which the representative part is identified and displayed Step B to be displayed with a list of model diagrams
An operation for selecting any one of the component types displayed as the schematic diagram is received, and a list of sample images schematically representing the appearance characteristics of the sub-component types belonging to the selected component type is displayed on the non-defective substrate. Step C for displaying in parallel with the image,
Step D for receiving an operation for designating a range corresponding to the representative component in the display area of the image of the non-defective substrate,
An operation for selecting any one of the sub-part types displayed as the sample image is accepted, and the range and representative designated in step D are determined based on the setting rule for the inspection area of the selected sub-part type. Step E for setting a predetermined number of inspection areas to match the orientation of the part,
When the confirmation area is displayed after the inspection area set in step E is superimposed on the display area of the image and the display area is displayed, the basic library data of the selected sub-part type is displayed during the confirmation operation. A board appearance characterized by executing each step of step F, in which data corrected based on the inspection area is stored as library data of new variations of the sub-part type in association with the model name of the representative part. How to create library data for inspection.   In step E, when a sub-component type of a type in which a plurality of electrodes and a plurality of electrode arrangements with respect to a component body are assumed is selected, an input is received regarding the number of electrodes of the representative component and the electrode arrangement state. The board appearance inspection library according to claim 1, wherein after the execution, the inspection area for the electrode and solder inspection is set in accordance with the input rule according to the setting rule of the inspection area of the selected sub-component type. How to create data. In the step A, further input an image before the non-defective board component is mounted,
In the step E, before the component is mounted based on the range of the representative component specified in the step C and the orientation of the representative component, and the setting rule of the inspection area for solder inspection of the selected sub-component type. The board appearance inspection library according to claim 1, wherein a land corresponding to a representative part is extracted from an image of the board, and an inspection area for solder inspection based on the setting rule is adjusted so as to match the extracted land. How to create data. A method of creating inspection data taught to an appearance inspection apparatus for a component mounting board using a computer,
Subpart types are subdivided into a predetermined number of subpart types based on differences in appearance that affect the inspection parameters. Basic library data that associates inspection area setting rules with inspection parameters to be applied to each inspection area is set for each layer, and the hierarchical relationship between each part type and each sub part type, and basic library data for each sub part type Are registered in the computer,
Step A for inputting the board design information indicating the type and mounting position of each component to be mounted and the orientation of the component, and an image of a non-defective board manufactured based on the board design information,
Based on the board design information, one of the parts having the same model name mounted on the non-defective board is selected as a representative part, and an image of the non-defective board on which the representative part is identified and displayed Step B to be displayed with a list of model diagrams
An operation for selecting any one of the component types displayed as the schematic diagram is received, and a list of sample images schematically representing the appearance characteristics of the sub-component types belonging to the selected component type is displayed on the non-defective substrate. Step C for displaying in parallel with the image,
Step D for receiving an operation for designating a range corresponding to the representative component in the display area of the image of the non-defective substrate,
An operation for selecting any one of the sub-part types displayed as the sample image is accepted, and the range and representative designated in step D are determined based on the setting rule for the inspection area of the selected sub-part type. Step E for setting a predetermined number of inspection areas to match the orientation of the part,
When the confirmation area is displayed after the inspection area set in step E is superimposed on the display area of the image and the display area is displayed, the basic library data of the selected sub-part type is displayed during the confirmation operation. Step F for saving the data corrected based on the inspection area in correspondence with the model name of the representative part as library data of a new variation of the sub-part type.
Applying the library data to each part indicated by the board design information by the model name associated with the new library data stored in step F according to the position and orientation of the part,
An inspection data creating method for inspecting a substrate appearance, characterized in that each of the steps is executed.