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
CN110868804AInactive Publication Date: 2020-03-06QUZHOU SUNLORD CIRCUIT BOARD CO LTD
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
QUZHOU SUNLORD CIRCUIT BOARD CO LTD
Publication Date
2020-03-06
Estimated Expiration
Not applicable Β· inactive patent
Patent Text Reader

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.
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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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