阅读说明：本技术 一种金面防止擦花、刮伤的方法 (Method for preventing gold surface from being scratched and scratched ) 是由 蔡粤凯 于 2021-06-01 设计创作，主要内容包括：本发明公开了一种金面防止擦花、刮伤的方法；包括如下步骤：步骤一、对PCB板镀金；步骤二、对PCB板防焊；步骤三、在PCB板表面喷涂热固油墨；步骤四、热固化,使得热固化油凝固在PCB板表面；步骤五、成形；步骤六、斜边；步骤七、控深锣；步骤八、退洗热固油墨；步骤九、质量检查；步骤十、包装本发明可使用所有的有金面的产品；极大改善金手指/大金面产品擦花、刮伤问题；显著提升产品良率。(The invention discloses a method for preventing a gold surface from being scratched and scratched; the method comprises the following steps: step one, gold plating is carried out on a PCB; step two, solder mask is carried out on the PCB; step three, spraying thermosetting ink on the surface of the PCB; step four, thermocuring, so that thermocuring oil is solidified on the surface of the PCB; step five, forming; step six, beveling; seventhly, depth control gong; step eight, removing and washing the thermosetting ink; step nine, quality inspection; step ten, packaging the product with all gold surfaces; the problems of scratching and scratching of the golden finger/large golden surface product are greatly improved; the product yield is obviously improved.)

1. A method for preventing a gold surface from being scratched and scratched is characterized by comprising the following steps:

step one, gold plating is carried out on a PCB;

step two, solder mask is carried out on the PCB;

step three, spraying thermosetting ink on the surface of the PCB;

step four, thermocuring, so that thermocuring oil is solidified on the surface of the PCB;

step five, forming;

step six, beveling;

seventhly, depth control gong;

step eight, removing and washing the thermosetting ink;

step nine, quality inspection;

step ten, packaging.

2. The method for preventing the gold surface from scratching and scuffing according to claim 1, wherein the temperature for the heat curing is 150 plus or minus 10 ℃ and the time is 30 plus or minus 10 min.

3. The method for preventing the gold surface from being scratched and scratched according to claim 1, wherein in the eighth step, the solution for stripping the thermosetting ink is a sodium hydroxide solution, the concentration of the sodium hydroxide is 5% -8%, and the stripping temperature is 50+/-5 ℃.

Technical Field

The invention relates to the field of PCB (printed circuit board), in particular to a method for preventing a gold surface from being scratched and scratched.

Background

Because the gold fingers and large-gold-surface products are increased gradually, a series of carrying and machining processes are provided after gold plating; the gold surface is very easy to scratch and is difficult to control, and the prior prevention technology has the effects of paper separation, light carrying and light release and the like; resulting in more scrap and seriously affecting the yield. The gold surface produced by the prior art is easy to have scratches as shown in figure 1.

Disclosure of Invention

The invention aims to overcome the defects of the technology and discloses a method for preventing a gold surface from being scratched; the invention can use all products with gold surface; the problems of scratching and scratching of the golden finger/large golden surface product are greatly improved; the product yield is obviously improved.

In order to solve the technical problems, the technical scheme adopted by the invention is as follows:

a method for preventing a gold surface from being scratched and scratched comprises the following steps:

step one, gold plating is carried out on a PCB;

step two, solder mask is carried out on the PCB;

step three, spraying thermosetting ink on the surface of the PCB;

step four, thermocuring, so that thermocuring oil is solidified on the surface of the PCB;

step five, forming;

step six, beveling;

seventhly, depth control gong;

step eight, removing and washing the thermosetting ink;

step nine, quality inspection;

step ten, packaging.

In a further improvement, the temperature of the heat curing is 150 +/-10 ℃, and the time is 30 +/-10 min.

In the eighth step, the solution for stripping the thermosetting ink is sodium hydroxide solution, the concentration of the sodium hydroxide is 5% -8%, and the stripping temperature is 50+/-5 ℃.

The invention has the beneficial effects that:

all gold faced products can be used; the problems of scratching and scratching of the golden finger/large golden surface product are greatly improved; the product yield is obviously improved.

Drawings

FIG. 1 is a prior art gold face;

FIG. 2 is a gold overlay of the present invention.

Detailed Description

The embodiments of the present invention will be further described with reference to the drawings and examples. It should be noted that the examples do not limit the scope of the claimed invention.

The improvement of the invention in the prior art is as follows:

1. and after gold plating, a thermosetting ink selecting flow is added, and a layer of thermosetting ink is covered on the gold surface to protect the gold surface.

2. In a series of processes after gold plating, the thermosetting ink always covers the gold surface and cannot be scratched or scratched.

3. The thermosetting ink was removed before electrical testing.

The process comprises the following steps: front process → gold plating → solder mask → heat-curing ink is selected → molding → bevel edge → depth control gong → heat-curing ink is washed off → FQC → packaging.

The advantages are that: all gold faced products can be used; the problems of scratching and scratching of the golden finger/large golden surface product are greatly improved; the product yield is obviously improved. (the problem of cost increase can be ignored only by changing the process of the product of electrogilding and gold melting), the process of selecting the thermosetting ink is added after the product is gilded, and a layer of thermosetting ink is covered on the gold surface to protect the gold surface; in a series of processes after gold plating, thermosetting ink always covers on a gold surface; the gold surface is not scratched or scratched, and the mechanical processing procedures such as bevel edge control, depth control, routing and the like are not influenced by controlling the thickness of the printing ink to be about 20 mu m; the thermosetting ink is faded before electrical measurement, so that the yield is greatly improved.

Heat-set ink: the components of the composition are as follows: mainly consists of polyvinyl chloride (PVC) and phthalate, and the thermosetting ink is formed by mixing the PVC, the phthalate, a color fixing agent, a stabilizing agent and a thickening agent; after printing is completed, curing can be completed by direct heating. Typically 150 ℃ for 30 minutes. The sodium hydroxide film removing sections of the inner and outer layer etching lines can be directly removed; is convenient and quick.

The advantages are that: greatly improving the problems of scratching and scratching of the golden finger/large golden surface.

The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present specification and drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.