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Manufacturing method for printed circuit board for portable card type equipment

A printed circuit board, portable card technology, applied in the directions of printed circuit manufacturing, printed circuits, electrical components, etc., can solve the problems of affecting the effect of laser drilling, limited laser absorption capacity, limited laser distance, etc., to achieve low cost and increase. Maximum thickness, the effect that meets the needs of punching

Inactive Publication Date: 2020-03-06
QUZHOU SUNLORD CIRCUIT BOARD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the laser distance of laser drilling is limited, and the surface with strong brightness and gloss has limited ability to absorb laser light, which affects the effect of laser drilling. Therefore, the laser drilling method of the prior art cannot realize the integrity of the substrate of the prior art. Perforation, therefore, the application of laser drilling in the prior art is limited to the production of blind holes

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 2

[0042] This embodiment is similar to the first embodiment, except that in this embodiment, a porous jig is placed on the laser table, and the porous jig is used to position the substrate at a specific position on the laser table. There are air suction holes on the laser table, and the holes on the porous jig are staggered from the air suction holes and the holes to be drilled on the surface of the substrate to ensure that the substrate can be attached to the porous jig smoothly. At this time, the positioning holes on the substrate can be connected to the multi-hole jig, or on the laser table.

[0043] Further, the upper surface of the porous fixture is a copper surface, which can prevent the laser from damaging the equipment table after the laser drills through the holes.

[0044] The scheme will be further described in detail below in conjunction with specific examples:

[0045] 1) Mechanically drill 4 positioning holes with a diameter of 3.175um on the substrate;

[0046] ...

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Abstract

The invention provides a manufacturing method for a printed circuit board for portable card type equipment. The manufacturing method comprises the following steps of S1, mechanically drilling a positioning hole in a TF board substrate, S2, thinning copper on the surface of the TF board substrate, S3, carrying out oxidation treatment on the thinned copper surface so that the copper surface is in adark rough state, and S4, positioning the TF board substrate on a laser tabletop according to positioning holes, and performing laser drilling to obtain required via holes. A laser drilling mode is used for replacing a mechanical drilling mode, a drill point is not needed, and the problems that the drill point is difficult to manufacture due to the fact that the hole diameter of a hole to be drilled is reduced, and meanwhile the drilling effect is greatly reduced due to change of the drill point are solved; copper reduction treatment and copper surface oxidation treatment are carried out on the TF board substrate, and the laser drilling effect is guaranteed.

Description

technical field [0001] The invention belongs to the technical field of printed circuit boards, in particular to a method for manufacturing a printed circuit board for portable card-type equipment. Background technique [0002] TF card is one of the small flash memory cards. In addition to mobile phones, TF cards can be seen in devices such as tablet computers, GPS devices, SLR cameras and sports cameras. [0003] Limited by the application environment of the TF card, the TF card circuit board as the carrier adopts a double-sided design with high wiring density, the line width / space has been reduced to 50 microns / 50 microns, and the aperture of the via hole has also been reduced to 50 microns. About 0.1mm. [0004] Usually the diameter of the via hole of the printed circuit board is greater than 0.2 mm, and it is made by a drilling machine with 200,000 revolutions. At the same time, three pieces can be stacked together for mechanical drilling to reduce the drilling cost, and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05K3/00
CPCH05K3/0047
Inventor 石林国白耀文袁琛郑忠鑫徐利刚柯雪丽
Owner QUZHOU SUNLORD CIRCUIT BOARD CO LTD
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