TWI614144B - Inkjet printhead chip - Google Patents

Abstract

The present invention relates to an inkjet head wafer which is applied to an inkjet head, wherein the inkjet head wafer has an ink supply hole and an identification circuit for identifying information related to the inkjet head, and the inkjet head wafer is characterized by: identification The circuit is comprised of at least one fuse switch and at least one erasable programmable read-only memory.

Description

Inkjet head wafer

The present invention relates to an ink jet head wafer, and more particularly to an ink jet head wafer having an identification circuit, and the identification circuit is composed of at least one fuse switch and an erasable programmable read only memory.

In recent years, with the popularity of personal computers and the rapid development of the Internet, inkjet printers have become an essential product in personal computer equipment. For the average user, a basic inkjet printer is sufficient for a variety of document printing needs. As we all know, there are many factors that affect the printing quality of inkjet printers, such as the composition of the ink, the choice of paper, and the ink supply method of the ink cartridge. In order to pursue a more perfect print quality, the relevant developers have invested a lot of time and effort in the design of ink storage and ink supply structure, in order to meet the requirements of simple structure, low production cost, high ink storage capacity and high printing quality. .

Since the development of inkjet printing technology, the way to control the inkjet head to discharge ink droplets to the inkjet media can be roughly divided into two major mainstreams, one of which is the Thermal Bubble Ink Jet technology, which operates. The principle is that a portion of the ink is bubbled by heating with a thin film resistor to extrude the ink, and is sprayed onto the inkjet medium through a plurality of orifices. The other is the Piezo-electric technology, which uses the piezoelectric properties of the piezoelectric material to push the ink out of the nozzle after energization.

Since each type of inkjet printing technology needs to match a unique inkjet head, plus various inkjet heads have their own special specifications, including: the structure of the inkjet head, the ink used, and the spray The number of holes and the characteristics of the inkjet control circuit, so it is necessary to match the compatible printing system, in order to correctly complete the printing work. In general, the ink cartridge set by the current inkjet printer can carry two kinds of ink simultaneously. Ink cartridge or two or more ink cartridges at the same time, since the specifications of the inkjet head provided by the color ink cartridge and the black ink cartridge are not the same, when the user mounts the ink cartridge to the inkjet printer, the inkjet The control circuit inside the printer must be able to recognize the specifications of the inkjet head of the ink cartridge, so that the corresponding driver can be used for driving. Therefore, the inkjet head needs an identification circuit to recognize the inkjet head as an inkjet printer. The use of features or messages, and the identification circuit as the basis for the inkjet printer can be used for inkjet printers.

The identification circuit is disposed in the inkjet head wafer of the inkjet head for recording information related to the inkjet head, and can provide information to the inkjet printer through, for example, an electronic circuit, so that the inkjet printer and the inkjet printer There is a good match between the ink heads, and the purpose of identifying the inkjet head is achieved. However, since the identification circuit of the conventional inkjet head wafer uses a specific circuit component to be used as a printer to identify the characteristics or message of the inkjet head, and the specific circuit component is complicated in the operation of the circuit, and the price is relatively expensive. As a result, the production cost of the ink jet head will be relatively increased.

Therefore, how to develop an ink jet head wafer which can improve the above-mentioned conventional technology is an urgent problem to be solved by those skilled in the related art.

The purpose of the present invention is to provide an ink jet head wafer in which the identification circuit in the ink jet head wafer is an array combination structure composed of at least one fuse switch and at least one erasable programmable read only memory. The identification circuits in the inkjet head wafer are all formed by using specific circuit components, which are complicated in circuit implementation and expensive, resulting in a relative increase in the production cost of the inkjet head.

In order to achieve the above object, a broader aspect of the present invention provides an ink jet head wafer for use in an ink jet head, wherein the ink jet head wafer has an ink supply hole and an identification circuit for identifying the spray In relation to the ink head, the ink jet head wafer is characterized in that the identification circuit is composed of at least one fuse switch and at least one erasable programmable read only memory.

1‧‧‧Inkjet head wafer

10‧‧‧ ink supply hole

11‧‧‧ Identification circuit

12‧‧‧Fuse switch

13‧‧‧Can erase programmable read-only memory

130‧‧‧Control gate

131‧‧‧Floating gate

132‧‧‧ base

133‧‧‧ source

134‧‧‧汲polar

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a block diagram showing the structure of an ink jet head wafer of the preferred embodiment of the present invention.

Fig. 2 is a schematic view showing the structure of the identification circuit shown in Fig. 1.

Figure 3 is a schematic view showing the structure of the fuse switch shown in Figure 2 when it is not burned.

Figure 4 is a schematic view showing the structure of the fuse switch shown in Figure 2 during burning.

Figure 5 is a schematic diagram of the structure of the erasable programmable read-only memory shown in Figure 2.

Some exemplary embodiments embodying the features and advantages of the present invention are described in detail in the following description. It is to be understood that the present invention is capable of various modifications in various aspects, and is not to be construed as a limitation.

Please refer to FIGS. 1 and 2, wherein FIG. 1 is a block diagram of the ink jet head wafer of the preferred embodiment of the present invention, and FIG. 2 is a schematic structural view of the identification circuit shown in FIG. As shown in Figs. 1 and 2, the ink jet head wafer 1 of the present embodiment is applied to an ink jet head (not shown) and can be electrically connected to an ink jet printer (not shown). The ink jet printer can identify the type and type of the ink jet head by the information provided by the ink jet head wafer 1.

In the present embodiment, the ink jet head wafer 1 has an ink supply port 10 and an identification circuit 11. The ink supply port 10 is for supplying ink. The identification circuit 11 is used for recording information related to the inkjet head. For example, when the inkjet head is produced, the identification code corresponding to the inkjet head or the identification code of the serial number is recorded in the identification circuit 11 to make the spray. Ink printer can read by storing The identification code stored in the identification circuit 11 of the inkjet head wafer 1 further identifies the type and type of the inkjet head.

In this embodiment, the identification circuit 11 can be identified by an array combination of at least one fuse switch 12 and at least one erasable programmable read only memory 13 (EPROM), for example, as shown in FIG. The circuit 11 can be an array combination of four fuse switches 12 and twelve erasable programmable read-only memories 13, wherein in the array combination structure of the identification circuit 11, the first column in the identification circuit 11 Four erasable programmable read-only memory 13 can be provided, the second column can be provided with four fuse switches 12, and the third column and the fourth column can be respectively set with four erasable programmable only The memory 13 is read. Further, corresponding to the identification circuit 11 having four fuse switches 12 and twelve erasable programmable read-only memories 13, the identification circuit 11 can actually provide a memory capacity of 16 bits. Of course, the number of the fuse switch 12 and the erasable programmable read-only memory 13 in the identification circuit 11 and the set position and memory capacity are not limited to those shown in FIG. 2, and may be determined according to the actual requirements of the identification circuit 11. There are different implementations.

Please refer to Figures 3 and 4, which are schematic diagrams of the fuse switch shown in Figure 2, respectively, when not burned and burned. As shown in FIG. 3 and FIG. 4, in the embodiment, the fuse switch 12 can be, but is not limited to, a metal fuse or a poly fuse. In addition, when the fuse switch 12 does not receive a programming and writing voltage and is not burned, as shown in FIG. 3, the fuse switch 12 is short-circuited, and the fuse switch 12 can provide a logic low level. The state, that is, logic 0, on the other hand, when the fuse switch 12 receives a programming and writing voltage for burning, the fuse switch 12 is disconnected and is open, that is, as shown in FIG. The wire switch 12 can provide a logic high level state, i.e., a logic one. Since the fuse switch 12 can provide a logic low level state or a logic high level state by burning, a specific specification (including using ink, number of nozzle holes, inkjet control circuit, etc.) on the inkjet head can be recorded. Inside the inkjet head.

In addition, since the blow-out of the fuse switch 12 is permanent, that is, it can only be written once, the fuse switch 12 actually has a non-recoverable and unchangeable characteristic, so the fuse switch 12 in the identification circuit 11 is Applicable to records with fixed data, such as the date of manufacture of the inkjet head, the effective date of the inkjet head, and the inkjet printer to which the inkjet head is applied.

Please refer to FIG. 5, which is a schematic diagram of the structure of the erasable programmable read-only memory shown in FIG. As shown in FIG. 5, the erasable programmable read-only memory 13 has a control gate 130, a floating gate 131, a substrate 132, a source 133 and a drain 134, wherein the source 133 and the drain 134 The system may be, but not limited to, an N-type, and the substrate 132 may be, but not limited to, a P-type. When the erasable programmable read-only memory 13 is being burned, the drain 134 is applied with a high voltage to cause electrons to flow from the source 133 to the drain 134 and the channel between the source 133 and the drain 134 is fully turned on. Under the action of high voltage, the pulling force of the electron is strengthened, the energy causes the temperature of the electron to rise extremely, becomes hot electron, and due to the high voltage applied by the control gate 130, the hot electron is injected into the floating gate 131. The programmable programmable read only memory 13 can provide a logic high level state, that is, logic 1, and when the floating gate 131 has no hot electrons, the programmable read only memory 13 can provide a logic low level. Bit state, which is logic 0. Since the erasable programmable read-only memory 13 can also provide a logic low level state or a logic high level state by programming, it also has a recording function, so that the inkjet head can be specified on a specific specification (including using ink). , the number of orifices, the inkjet control circuit, etc.) are recorded in the inkjet head.

In addition, since the erasable programmable read-only memory 13 has the characteristics of repeatable programming, the recording can be repeated, so that the erasable programmable read-only memory 13 in the identification circuit 11 is suitable for recording changeable. Data, such as changes in the amount of ink when the inkjet head is printed, and the number of printed sheets.

In summary, the present invention provides an inkjet head wafer, the identification circuit of the inkjet head wafer is an array combination structure composed of at least one fuse switch and at least one erasable programmable read-only memory. Fuse switch records fixed data, by erasing programmable only Reading data that can be changed by the memory record, so that the information record of the identification circuit can be better changed, so that the information recorded by the inkjet head wafer is more complete, thereby enabling the inkjet printer to be The inkjet head wafers get more information (including ink volume, inkjet wafer temperature, ink form, etc.), and because the price of the fuse switch is cheaper than the erasable programmable read-only memory, it is better than conventional The identification circuit of the inkjet head chip is formed by erasing programmable read-only memory. In this case, the identification circuit formed by the fuse switch and the erasable programmable read-only memory is relatively cheap, so that This will reduce the production cost of the ink jet head.

This case has been modified by people who are familiar with the technology, but it is not intended to be protected by the scope of the patent application.

11‧‧‧ Identification circuit

12‧‧‧Fuse switch

13‧‧‧Can erase programmable read-only memory

Claims (6)

An inkjet head wafer is applied to an inkjet head, wherein the inkjet head wafer has an ink supply hole and an identification circuit for recording information related to the inkjet head, the inkjet head The chip is characterized in that the identification circuit is composed of at least one fuse switch and at least one erasable programmable read-only memory, wherein the fuse-open relationship is used to record fixed data, and the erasable data can be erased. The programming read-only memory system is used to record the changeable data, and when the fuse switch is not burned, the fuse open relationship provides a logic low level state, and when the fuse switch is burned, the fuse opens The relationship provides a logical high level state. The inkjet head wafer of claim 1, wherein the fuse open relationship is used to record an inkjet head date of manufacture, an inkjet head effective date, and an inkjet print suitable for the inkjet head. Table machine. The inkjet head wafer of claim 1, wherein the erasable programmable read-only memory system records the change in the amount of ink and the number of printed sheets when the inkjet head is printed. The inkjet head wafer of claim 1, wherein the erasable programmable read-only memory system provides one when a floating gate of the erasable programmable read-only memory is injected into a hot electron Logic high level state. The inkjet head wafer of claim 1, wherein the erasable programmable read-only memory system provides a thermal electron when one of the erasable programmable read-only memory floating gates does not have a hot electron Logic high level state. The inkjet head wafer of claim 1, wherein the identification circuit is composed of four of the fuse switches and twelve of the erasable programmable read-only memories to form a sixteen-bit identification. Circuit.