Making method of electric nickel and golden circuit board for saving nickel and gold dosage

Abstract

A manufacturing method of an electrolytic nickel and gold wiring board capable of saving dosage of nickel and gold, comprises broaching, copper precipitation, and copperizing on a copper-coated plate. The method is characterized by further comprising: a, adhering a dry film or printing a wet film on the wiring board, then adhering a positive sheet, exposing and developing to form a primary circuit; b, electroplating nickel and gold on all positions to be welded and copper surfaces of metal holes, then stripping; c, printing a wet film or adhering a dry film, then adhering a negative sheet, exposing and developing to form a secondary circuit; d, etching a circuit diagram, removing non-circuit portions, holding circuit portions, then performing stripping and etching detection; e, performing deoxidation treatment to the wiring board to remove oxides on the copper surfaces; f, after deoxidation treatment, resistance welding, exposing, developing, printing element symbols and machining shapes so as to manufacture the electrolytic nickel and gold wiring board only at the positions to be welded and the metal hole positions. With the method, the area of the nickel and gold can be reduced by 40-60%, thereby saving the noble metal nickel and gold and effectively reducing enterprise production cost.

Description

【Technical field】 [0001] The invention relates to a printed circuit board (PCB), in particular to a method for manufacturing an electro-nickel and gold circuit board which can reduce the plated area by 40-60% compared with a traditional circuit board and can save nickel and gold consumption. 【Background technique】 [0002] As we all know, printed circuit boards (PCBs) are used in almost all electronic devices we can see, ranging from electronic watches, calculators, general-purpose computers, to computers, electronic communication equipment, military weapon systems, etc., as long as There are electronic components such as integrated circuits, and PCBs are used for electrical interconnection between them. Printed circuit boards are formed by setting conductive patterns for electrical connections between electronic components on an insulating substrate, and its manufacturing process is relatively complicated. On printed circuit boards with higher requirements, nickel and gold...

AI Technical Summary

Problems solved by technology

Because in the traditional electro-nickel and electro-gold process, nickel and gold need to be plated on all conductive patterns, so a large amount of nickel and gold need to be consumed, and nickel and gold are precious metals. Partial nickel and gold plating not only reflects the major defects of the traditional process, but also directly leads to the waste of precious metals, and greatly increases the production cost of the enterprise

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