Printed circuit board manufacturing method

Abstract

The invention relates to a printed circuit board manufacturing method which includes the steps: S1 cutting to form a jointed board comprising an inner base board and copper foils attached to the upper surface and the lower surface of the inner base board; S2 printing graphics by the aid of a wet film; S3 performing alkaline etching; S4 performing resistance welding and developing characters; S5 performing electric test. A green oil exposure developing character mode replaces a screen printing character mode in the prior art, the process is simpler, production time is greatly shortened, and production cost is reduced. Besides, compared with a dry film mode in the prior art, the graphics are printed by the aid of the wet film without trans-department coordinative operation, production cost is reduced, and production cycle is shortened.

Description

technical field [0001] The invention relates to the technical field of printed circuit board production, in particular to a method for manufacturing a printed circuit board. Background technique [0002] Printed circuit board: also known as printed circuit board, printed circuit board, referred to as printed board, often use the English abbreviation PCB or write PWB, with an insulating board as the base material, cut to a certain size, with at least one conductive pattern attached to it, And there are holes (such as component holes, fastening holes, metallization holes, etc.), which are used to replace the chassis of the previous installation of electronic components and realize the interconnection between electronic components. Since such boards are made using electronic printing, they are called "printed" circuit boards. [0003] At present, the main production process of printed circuit boards is: planning feeding—cutting—mechanical drilling—graphic printing—etching—remo...

AI Technical Summary

Problems solved by technology

In the above-mentioned printed circuit board manufacturing method, the graphic printing step uses a dry film, and the etching of the graphic needs to be coordinated across departments. The production cycle is long and the cost of production materials is high.

[0004] In addition, the existing production method adopts the method of screen printing characters, which requires screen printing characters, and a baking board is required after the screen printing characters, resulting in long production cycle, complicated process, high cost, and the complicated process is easy to damage the printed circuit board. Lead to high scrap rate in the production process, which reduces the profit of the enterprise

Images