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CN109005645A - A kind of production method of the double electric thick gold finger of PCB - Google Patents

A kind of production method of the double electric thick gold finger of PCB Download PDF

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Publication number
CN109005645A
CN109005645A CN201811003191.1A CN201811003191A CN109005645A CN 109005645 A CN109005645 A CN 109005645A CN 201811003191 A CN201811003191 A CN 201811003191A CN 109005645 A CN109005645 A CN 109005645A
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CN
China
Prior art keywords
metal foil
pcb
gold finger
thick gold
electric thick
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201811003191.1A
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Chinese (zh)
Inventor
刘小刚
王平
黎钦源
彭镜辉
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Guanghe Science And Technology (guangzhou) Co Ltd
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Guanghe Science And Technology (guangzhou) Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Priority to CN201811003191.1A priority Critical patent/CN109005645A/en
Publication of CN109005645A publication Critical patent/CN109005645A/en
Pending legal-status Critical Current

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    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05KPRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K3/00Apparatus or processes for manufacturing printed circuits
    • H05K3/22Secondary treatment of printed circuits
    • H05K3/24Reinforcing the conductive pattern
    • H05K3/243Reinforcing the conductive pattern characterised by selective plating, e.g. for finish plating of pads
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05KPRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K3/00Apparatus or processes for manufacturing printed circuits
    • H05K3/22Secondary treatment of printed circuits
    • H05K3/26Cleaning or polishing of the conductive pattern
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05KPRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K3/00Apparatus or processes for manufacturing printed circuits
    • H05K3/38Improvement of the adhesion between the insulating substrate and the metal
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05KPRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K2203/00Indexing scheme relating to apparatus or processes for manufacturing printed circuits covered by H05K3/00
    • H05K2203/09Treatments involving charged particles
    • H05K2203/095Plasma, e.g. for treating a substrate to improve adhesion with a conductor or for cleaning holes

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Laminated Bodies (AREA)
  • Manufacturing Of Printed Wiring (AREA)

Abstract

The present invention provides a kind of production method of double electric thick gold finger of PCB, which comprises the following steps: metal foil and core plate arrange according to setting by S1.;S2. it is pressed by way of segmentation pressing;S3. the copper that sinks removes glue: including using plasma process, utilizing N2、CF4、O2Any one of three kinds of gas, temperature set 60-90 DEG C of time, 35-55min, except glue speed is 0.2-0.4mg/cm2;S4. plate face residue glue, asterism residue glue situation are checked, and carries out grinding process residue glue;S5. detection pressing quality: 288 DEG C thermal shock 6 times, every time 10 seconds without plate bursting phenomenon, without copper area without starved, core thickness is 0.05 ± 0.025mm;S6. electric thick gold finger;S7. gold finger lead is lost;S8. change gold.The production method of the double electric thick gold finger of PCB of the invention, it can effectively improve the interlayer heat resistance of PCB inner layers after pressing, the generation for effectively avoiding plate from sticking up has quality in excellent hole, impedance can satisfy the demand of a variety of electronic products, can effectively ensure that the gold of electric thick gold finger is thick.

Description

A kind of production method of the double electric thick gold finger of PCB
Technical field
The invention belongs to wiring board processing technique fields, and in particular to a kind of production method of the double electric thick gold finger of PCB.
Background technique
PCB is the major technique in high-end electronic devices.High-performance, high speed and light and handy characteristic in meeting the requirements, A kind of multidisciplinary industry, in PCB product no matter rigidity, it is flexible, make major contribution for high-end electronic devices.PCB industry exists Occupy very big status in electronics techniques.PCB is electronic component important in one, is applied to all electronic equipments, including Electronic watch, calculator, or even computer, communication, have application in weapon system.PCB printed board can complete integrated circuit Electric interconnection between element.Wherein design, documentation and the manufacture of printed board are the Developing Electronic Products of many large sizes In, one of most important success factor.
In PCB manufacturing, the low DK material of high-frequency high-speed is more and more applied to the production of high-end PCB product, high to meet The demand of PCB product, the especially pcb board in unmanned plane are held, is needed double electric thick gold golden finger (disconnected golden finger design), it is existing It is not mature enough in technology for such design, needs to improve.
Summary of the invention
In view of this, the present invention provides a kind of production method of double electric thick gold finger of PCB, the double electricity of PCB of the invention The production method of thick golden finger can effectively improve the interlayer heat resistance of PCB inner layers after pressing, effectively plate be avoided to stick up Occur, there is quality in excellent hole, impedance can satisfy the demand of a variety of electronic products, can effectively ensure that electric thick gold finger Gold it is thick.
The technical solution of the present invention is as follows: a kind of production method of the double electric thick gold finger of PCB, which is characterized in that including with Lower step:
S1. metal foil and core plate arrange according to setting;
S2. it is pressed by way of segmentation pressing;
S3. the copper that sinks removes glue: including using plasma process, utilizing N2 、CF4、O2Any one of three kinds of gas, temperature setting 60-90 DEG C of time, 35-55min, except glue speed is 0.2-0.4mg/cm2
S4. plate face residue glue, asterism residue glue situation are checked, and carries out grinding process residue glue;
S5. detection pressing quality: 288 DEG C thermal shock 6 times, every time 10 seconds without plate bursting phenomenon, without copper area without starved, core thickness is 0.05±0.025mm;
S6. electric thick gold finger;
S7. gold finger lead is lost;
S8. change gold.
Further, the PCB includes at least 2 layers of metal foil, 1 layer of core plate.
Further, the inside arrangement of the PCB is successively are as follows: metal foil, core plate, metal foil.
Further, the inside arrangement of the PCB is successively are as follows: metal foil, core plate, metal foil, PP layers, metal Foil, core plate, metal foil.
Further, the inside arrangement of the PCB is successively are as follows: metal foil, core plate, metal foil, PP layers, metal Foil, core plate, metal foil, PP layers, metal foil, core plate, metal foil.
Further, it is described segmentation pressing technique be using temperature-gradient method: 140 DEG C, 150 DEG C, 175 DEG C, 190 DEG C, 190 DEG C, 210 DEG C, 210 DEG C, 200 DEG C, 200 DEG C, 140 DEG C, every section of corresponding tonnage are 50 PSI, 100 PSI, 150 PSI, 380 PSI, 400 PSI, 400 PSI, 400 PSI, 400 PSI, 200 PSI, 200 PSI, every section of temperature is corresponding to be added It is 2 min, 5 min, 3 min, 4 min, 8 min, 10 min, 83 min, 30 min, 40 min, 20 min between working hour.
Further, the core plate with a thickness of 0.05mm, described PP layers with a thickness of 0.05-0.1mm, the metal foil With a thickness of 0.1-0.6mm.
Further, in the step S6, electric thick gold finger technique includes that lead is stamped to choosing plating oil, and 75 DEG C pre-baked 10min, then with the development of 6.0m/min speed;Whole plate pastes blue glue, will be printed on choosing plating ink placement indigo plant glue and is cut open with blade, this position It is gold-plated to be set to golden finger position;Normal electric thick gold finger tears blue glue, and moves back in internal layer and select carburetion black.
Further, the thick golden finger with a thickness of 32-102U ".
Further, in the step S7, the erosion gold finger lead technique includes golden finger position windowing, other positions lid Dry film protection, exposure guide rule 6-9 lattice, developing powder 3.5-5.2m/min;Alkali etching striping, etching speed: 3.2-4.8m/min, Normally move back film 3.2-4.8m/min;It is anti-welding, and polish-brush is not opened in anti-pre-welding treatment.
Further, in the step S8, immersion process includes: character silk printing;Golden finger position lid choosingization dry film is plated, In, pad pasting speed is 1.5-2.2m/min, and exposure energy presses exposure guide rule 5-9 lattice, developing powder 2.6-3.2m/min, 4 after development Text is golden by converting after 100-130 DEG C of roasting 15-22min in hour.
The PCB with double electric thick gold finger obtained after present invention processing, has the following characteristics that
1. heat resistance: thermal shock after pressing is blistered without layering for Reflow Soldering 6 times, and heat resistance quality meets quality requirements;
2. plate is stuck up: slab warping degree requires≤0.75%;
3. quality in hole: PTH need to do plasma treatment, and plasma removes glue rate requirement 0.2-0.4mg/cm2, hole is thick, Kong Tongfu It closes and requires, the bad phenomenons such as imperforate wall separation;
4. impedance: this material DK 3.6, impedance Data Design press 3.6, and production plate impedance value meets the requirements of the customers;
5. electric thick gold finger: the thick golden finger gold of double power-off is thick to be required: 32-102U ", survey golden thickness 33.62-41.13U " qualification.
The production method of the double electric thick gold finger of PCB of the invention can effectively improve the layer of PCB inner layers after pressing Between heat resistance, the generation for effectively avoiding plate from sticking up has quality in excellent hole, and impedance can satisfy the need of a variety of electronic products It asks, can effectively ensure that the gold of electric thick gold finger is thick.
Specific embodiment
Technical solution of the present invention is clearly and completely described below in conjunction with embodiment, it is clear that described reality Applying example is only a part of the embodiment of the present invention, instead of all the embodiments.
Embodiment 1
A kind of production method of the double electric thick gold finger of PCB, which comprises the following steps:
S1. metal foil and core plate arrange according to setting;
S2. it is pressed by way of segmentation pressing;
S3. the copper that sinks removes glue: including using plasma process, utilizing N2, temperature 75 DEG C of times of setting, 40min, except glue speed is 0.3mg/cm2
S4. plate face residue glue, asterism residue glue situation are checked, and carries out grinding process residue glue;
S5. detection pressing quality: 288 DEG C thermal shock 6 times, every time 10 seconds without plate bursting phenomenon, without copper area without starved, core thickness is 0.05±0.025mm;
S6. electric thick gold finger;
S7. gold finger lead is lost;
S8. change gold.
Further, the PCB includes at least 2 layers of metal foil, 1 layer of core plate.
Further, the inside arrangement of the PCB is successively are as follows: metal foil, core plate, metal foil, PP layers, metal Foil, core plate, metal foil, PP layers, metal foil, core plate, metal foil.
Further, it is described segmentation pressing technique be using temperature-gradient method: 140 DEG C, 150 DEG C, 175 DEG C, 190 DEG C, 190 DEG C, 210 DEG C, 210 DEG C, 200 DEG C, 200 DEG C, 140 DEG C, every section of corresponding tonnage are 50 PSI, 100 PSI, 150 PSI, 380 PSI, 400 PSI, 400 PSI, 400 PSI, 400 PSI, 200 PSI, 200 PSI, every section of temperature is corresponding to be added It is 2 min, 5 min, 3 min, 4 min, 8 min, 10 min, 83 min, 30 min, 40 min, 20 min between working hour.
Further, the core plate with a thickness of 0.05mm, described PP layers with a thickness of 0.75mm, the thickness of the metal foil Degree is 0.3mm.
Further, in the step S6, electric thick gold finger technique includes that lead is stamped to choosing plating oil, and 75 DEG C pre-baked 10min, then with the development of 6.0m/min speed;Whole plate pastes blue glue, will be printed on choosing plating ink placement indigo plant glue and is cut open with blade, this position It is gold-plated to be set to golden finger position;Normal electric thick gold finger tears blue glue, and moves back in internal layer and select carburetion black.
Further, the thick golden finger with a thickness of 62U ".
Further, in the step S7, the erosion gold finger lead technique includes golden finger position windowing, other positions lid Dry film protection, 8 lattice of exposure guide rule, developing powder 4.2m/min;Alkali etching striping, etching speed: 4.0m/min normally moves back film 4.0m/min;It is anti-welding, and polish-brush is not opened in anti-pre-welding treatment.
Further, in the step S8, immersion process includes: character silk printing;Golden finger position lid choosingization dry film is plated, In, pad pasting speed is 2m/min, and exposure energy presses 7 lattice of exposure guide rule, and developing powder 2.8m/min, text is pressed in 4 hours after development Gold is converted after 120 DEG C of roasting 20min.
The PCB with double electric thick gold finger obtained after present invention processing, has the following characteristics that
1. heat resistance: thermal shock after pressing is blistered without layering for Reflow Soldering 6 times, and heat resistance quality meets quality requirements;
2. plate is stuck up: slab warping degree requires≤0.75%;
3. quality in hole: PTH need to do plasma treatment, and plasma removes glue rate requirement 0.2-0.4mg/cm2, hole is thick, Kong Tongfu It closes and requires, the bad phenomenons such as imperforate wall separation;
4. impedance: this material DK 3.6, impedance Data Design press 3.6, and production plate impedance value meets the requirements of the customers;
5. electric thick gold finger: the thick golden finger gold of double power-off is thick to be required: 32-102U ", survey golden thickness 33.62-41.13U " qualification.
The production method of the double electric thick gold finger of PCB of the invention can effectively improve the layer of PCB inner layers after pressing Between heat resistance, the generation for effectively avoiding plate from sticking up has quality in excellent hole, and impedance can satisfy the need of a variety of electronic products It asks, can effectively ensure that the gold of electric thick gold finger is thick.
Embodiment 2
A kind of production method of the double electric thick gold finger of PCB, which comprises the following steps:
S1. metal foil and core plate arrange according to setting;
S2. it is pressed by way of segmentation pressing;
S3. the copper that sinks removes glue: including using plasma process, utilizing CF4, temperature 60 DEG C of times of setting, 35min removes glue speed For 0.2mg/cm2
S4. plate face residue glue, asterism residue glue situation are checked, and carries out grinding process residue glue;
S5. detection pressing quality: 288 DEG C thermal shock 6 times, every time 10 seconds without plate bursting phenomenon, without copper area without starved, core thickness is 0.05±0.025mm;
S6. electric thick gold finger;
S7. gold finger lead is lost;
S8. change gold.
Further, the PCB includes at least 2 layers of metal foil, 1 layer of core plate.
Further, the inside arrangement of the PCB is successively are as follows: metal foil, core plate, metal foil.
Further, the core plate with a thickness of 0.05mm, described PP layers with a thickness of 0.05mm, the thickness of the metal foil Degree is 0.1mm.
Further, in the step S6, electric thick gold finger technique includes that lead is stamped to choosing plating oil, and 75 DEG C pre-baked 10min, then with the development of 6.0m/min speed;Whole plate pastes blue glue, will be printed on choosing plating ink placement indigo plant glue and is cut open with blade, this position It is gold-plated to be set to golden finger position;Normal electric thick gold finger tears blue glue, and moves back in internal layer and select carburetion black.
Further, the thick golden finger with a thickness of 32U ".
Further, in the step S7, the erosion gold finger lead technique includes golden finger position windowing, other positions lid Dry film protection, 6 lattice of exposure guide rule, developing powder 3.5m/min;Alkali etching striping, etching speed: 3.2m/min normally moves back film 3.2m/min;It is anti-welding, and polish-brush is not opened in anti-pre-welding treatment.
Further, in the step S8, immersion process includes: character silk printing;Golden finger position lid choosingization dry film is plated, In, pad pasting speed is 1.5m/min, and exposure energy presses 5 lattice of exposure guide rule, developing powder 2.6m/min, text in 4 hours after development It is golden by being converted after 100 DEG C of roasting 15min.
Embodiment 3
A kind of production method of the double electric thick gold finger of PCB, which comprises the following steps:
S1. metal foil and core plate arrange according to setting;
S2. it is pressed by way of segmentation pressing;
S3. the copper that sinks removes glue: including using plasma process, utilizing O2, temperature 90 DEG C of times of setting, 55min removes glue speed For 0.4mg/cm2
S4. plate face residue glue, asterism residue glue situation are checked, and carries out grinding process residue glue;
S5. detection pressing quality: 288 DEG C thermal shock 6 times, every time 10 seconds without plate bursting phenomenon, without copper area without starved, core thickness is 0.05±0.025mm;
S6. electric thick gold finger;
S7. gold finger lead is lost;
S8. change gold.
Further, the PCB includes at least 2 layers of metal foil, 1 layer of core plate.
Further, the inside arrangement of the PCB is successively are as follows: metal foil, core plate, metal foil, PP layers, metal Foil, core plate, metal foil.
Further, the core plate with a thickness of 0.05mm, described PP layers with a thickness of 0.1mm, the thickness of the metal foil Degree is 0.6mm.
Further, in the step S6, electric thick gold finger technique includes that lead is stamped to choosing plating oil, and 75 DEG C pre-baked 10min, then with the development of 6.0m/min speed;Whole plate pastes blue glue, will be printed on choosing plating ink placement indigo plant glue and is cut open with blade, this position It is gold-plated to be set to golden finger position;Normal electric thick gold finger tears blue glue, and moves back in internal layer and select carburetion black.
Further, the thick golden finger with a thickness of 102U ".
Further, in the step S7, the erosion gold finger lead technique includes golden finger position windowing, other positions lid Dry film protection, 9 lattice of exposure guide rule, developing powder 5.2m/min;Alkali etching striping, etching speed: 4.8m/min normally moves back film 4.8m/min;It is anti-welding, and polish-brush is not opened in anti-pre-welding treatment.
Further, in the step S8, immersion process includes: character silk printing;Golden finger position lid choosingization dry film is plated, In, pad pasting speed is 2.2m/min, and exposure energy presses 9 lattice of exposure guide rule, developing powder 3.2m/min, text in 4 hours after development It is golden by being converted after 130 DEG C of roasting 22min.
Experimental example
Interfacial bonding strength test.It is strong to metal foil and the combination of core plate, metal foil and PP interlayer using GB/T 5270-2005 Degree is tested, and steel ball burnishing experiment is carried out, and the results are shown in Table 1, carries out thermal shock experiment (300 DEG C) to PCB monomer, Configuration of surface is observed, the results are shown in Table 2.
Table 1
Experimental group Embodiment 1 Embodiment 2 Embodiment 3
Appearance Surfacing, without bubbling Surfacing, without bubbling Surfacing, without bubbling
Table 2
Experimental group Embodiment 1 Embodiment 2 Embodiment 3
Appearance Surfacing is removed, clast without bubbling, sheet Surfacing is removed, clast without bubbling, sheet Surfacing is removed, clast without bubbling, sheet
It is obvious to a person skilled in the art that invention is not limited to the details of the above exemplary embodiments, and do not carrying on the back In the case where from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, no matter from which From the point of view of a bit, the present embodiments are to be considered as illustrative and not restrictive, and the scope of the present invention is wanted by appended right Ask rather than above description limit, it is intended that by all changes that come within the meaning and range of equivalency of the claims It is included within the present invention.
In addition, it should be understood that although this specification is described in terms of embodiments, but not each embodiment is only wrapped Containing an independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should It considers the specification as a whole, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art The other embodiments being understood that.It is noted that the technical characteristic being not described in detail in the present invention, can pass through this Field any prior art is realized.

Claims (10)

1. a kind of production method of the double electric thick gold finger of PCB, which comprises the following steps:
S1. metal foil and core plate arrange according to setting;
S2. it is pressed by way of segmentation pressing;
S3. the copper that sinks removes glue: including using plasma process, utilizing N2、CF4、O2Any one of three kinds of gas, temperature setting 60-90 DEG C of time, 35-55min, except glue speed is 0.2-0.4mg/cm2
S4. plate face residue glue, asterism residue glue situation are checked, and carries out grinding process residue glue;
S5. detection pressing quality: 288 DEG C thermal shock 6 times, every time 10 seconds without plate bursting phenomenon, without copper area without starved, core thickness is 0.05±0.025mm;
S6. electric thick gold finger;
S7. gold finger lead is lost;
S8. change gold.
2. a kind of production method of the double electric thick gold finger of PCB according to claim 1, which is characterized in that the PCB packet Include at least 2 layers of metal foil, 1 layer of core plate.
3. a kind of production method of the double electric thick gold finger of PCB according to claim 2, which is characterized in that the PCB's Internal arrangement is successively are as follows: metal foil, core plate, metal foil.
4. a kind of production method of the double electric thick gold finger of PCB according to claim 2, which is characterized in that the PCB's Internal arrangement is successively are as follows: metal foil, core plate, metal foil, PP layers, metal foil, core plate, metal foil.
5. a kind of production method of the double electric thick gold finger of PCB according to claim 2, which is characterized in that the PCB's Internal arrangement is successively are as follows: metal foil, core plate, metal foil, PP layers, metal foil, core plate, metal foil, PP layers, metal foil, core Plate, metal foil.
6. a kind of production method of the double electric thick gold finger of PCB according to claim 5, which is characterized in that the segmentation The technique of pressing is using temperature-gradient method: 140 DEG C, 150 DEG C, 175 DEG C, 190 DEG C, 190 DEG C, 210 DEG C, 210 DEG C, 200 DEG C, 200 DEG C, 140 DEG C, every section of corresponding tonnage is 50 PSI, 100 PSI, 150 PSI, 380 PSI, 400 PSI, 400 PSI, 400 PSI, 400 PSI, 200 PSI, 200 PSI, every section of temperature corresponding process time are 2 min, 5 min, 3 min, 4 min、8 min、10 min、83 min、30 min、40 min、20 min。
7. according to a kind of described in any item production methods of the double electric thick gold finger of PCB of claim 4-6, which is characterized in that The core plate with a thickness of 0.05mm, described PP layers with a thickness of 0.05-0.1mm, the metal foil with a thickness of 0.1- 0.6mm。
8. a kind of production method of the double electric thick gold finger of PCB according to claim 1, which is characterized in that the step In S6, electric thick gold finger technique includes that lead is stamped to choosing plating oil, 75 DEG C of pre-baked 10min, then with the development of 6.0m/min speed; Whole plate pastes blue glue, will be printed on choosing plating ink placement indigo plant glue and is cut open with blade, this position is that golden finger position is gold-plated;Normal electric thick gold hand Refer to, tears blue glue, and move back in internal layer and select carburetion black.
9. a kind of production method of the double electric thick gold finger of PCB according to claim 1, which is characterized in that the step In S7, the erosion gold finger lead technique includes golden finger position windowing, the protection of other positions lid dry film, exposure guide rule 6-9 lattice, development Speed 3.5-5.2m/min;Alkali etching striping, etching speed: 3.2-4.8m/min normally moves back film 3.2-4.8m/min;It is anti- Weldering, and polish-brush is not opened in anti-pre-welding treatment.
10. a kind of production method of the double electric thick gold finger of PCB according to claim 1, which is characterized in that the step In S8, immersion process includes: character silk printing;Plate golden finger position lid choosingization dry film, wherein pad pasting speed is 1.5-2.2m/min, Exposure energy presses exposure guide rule 5-9 lattice, and developing powder 2.6-3.2m/min, text presses 100-130 DEG C of roasting 15- in 4 hours after development Gold is converted after 22min.
CN201811003191.1A 2018-08-30 2018-08-30 A kind of production method of the double electric thick gold finger of PCB Pending CN109005645A (en)

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CN102802367A (en) * 2012-08-06 2012-11-28 深圳崇达多层线路板有限公司 Multilayer board manufacturing method for improving bonding force of hole wall of PTH slot
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CN107278062A (en) * 2017-07-20 2017-10-20 胜宏科技(惠州)股份有限公司 A kind of high frequency board manufacturing method of different plate mixed pressures
CN107318231A (en) * 2017-07-20 2017-11-03 深圳明阳电路科技股份有限公司 A kind of preparation method of golden finger, printed wiring board
CN107666775A (en) * 2017-10-09 2018-02-06 台山市精诚达电路有限公司 The preparation method of multilayer soft board
CN108200736A (en) * 2017-12-04 2018-06-22 深圳崇达多层线路板有限公司 A kind of production method that pressing is avoided to fill not full PCB
CN108323011A (en) * 2018-01-25 2018-07-24 深圳崇达多层线路板有限公司 A kind of production method of multilayer Teflon wiring board
CN108401381A (en) * 2018-02-27 2018-08-14 深圳崇达多层线路板有限公司 A kind of production method of disconnecting golden finger class printed circuit board

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111065210A (en) * 2019-12-25 2020-04-24 上海嘉捷通电路科技股份有限公司 Method for replacing manual PCB (printed circuit board) process lead wire picking

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Application publication date: 20181214