Manufacturing method of half-hole PCB (printed circuit board)

Abstract

A manufacturing method of a half-hole PCB comprises the steps as follows: cutting, drilling, plate grinding, PTH (plating through hole), PP (panel plating), pattern plating, electroplating, etching and solder mask treatment are sequentially performed; holes to be subjected to half-hole routing are filled with an inorganic filler which has the characteristic of dehydration and hardening after the inorganic filler is heated; and board baking, routing, acid dip and board washing treatment are sequentially performed. According to the manufacturing method of the half-hole PCB, the holes are filled with the inorganic filler before the routing process is performed, and the inorganic filler is hardened after the board baking process is performed, so that the hole edges and the copper layers in the holes are protected and supported, and the following routing process is not prone to generate flashes or damage the copper layers in the holes; and moreover, the inorganic filler can be simply removed through cleaning by the acid liquor, through experimental verification and comparison with a traditional mode, the problems of half-hole flashes and absence of copper in the holes are solved, and the production efficiency and quality of the half-hole PCB are improved.

Description

technical field [0001] The invention relates to a method for manufacturing a PCB, in particular to a method for manufacturing a PCB half-hole plate. Background technique [0002] With the development of modern electronic products in the direction of light, thin, short and small, the circuit board as the cornerstone of electronic products has given more functions. Or a connected class of special products. There are more and more half-hole products, and the processing requirements and difficulties are also increasing. The traditional PCB half-hole board production process is as follows: [0003] Cutting, drilling, milling, copper sinking, plate electrical, graphics, electroplating, half-hole edge, etching, solder mask, baking plate, edge edge, plate washing. [0004] However, PCBs manufactured in the traditional way have more burrs on the edges of the half holes, and even have no copper in the holes, resulting in a low-quality PCB manufacturing. Contents of the invention ...

AI Technical Summary

Problems solved by technology

[0004] However, PCBs manufactured in the traditional way have more burrs on the edge of the half hole, or even no copper in the hole, which leads to the quality of PCB manufacturing.

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