Waterproof and antistatic treatment method for PCB of sensing type switch

Abstract

The invention discloses a waterproof and antistatic treatment method for a PCB of a sensing type switch. The method comprises the steps of cutting out a thermoplastic plastic film with the surface area larger than the area of the PCB, covering the PCB with the thermoplastic plastic film, and enabling the edge of the thermoplastic plastic film to extend out of the edge of the PCB; and placing the PCB covered with the thermoplastic plastic film on a circuit board jig of a plastic vacuum forming machine for plastic vacuum forming treatment, heating the thermoplastic plastic film while plastic vacuum forming is carried out, removing air between the thermoplastic plastic film and the PCB, and enabling the thermoplastic plastic film to be tightly attached to all components and parts and the surface and edge portions of the PCB. According to the scheme, the thermoplastic plastic film heating and plastic vacuum forming treatment process is adopted, so that the surface film coating efficiency of the PCB of the sensing type switch can be greatly improved, it can be ensured that the surfaces of all the original parts can be comprehensively coated with films, and the treatment cost of achieving waterproof, dustproof and antistatic effects of the PCB of the sensing type switch can be greatly reduced.

Description

technical field [0001] The invention relates to the field of circuit board waterproofing, in particular to a waterproof and antistatic manufacturing and processing method for inductive switch PCB boards. Background technique [0002] In the field of electronic equipment that outputs switch signals such as keyboards or mice, two main components are involved, namely the circuit board and the switch button. At present, one of the mainstream structures on the market is the electromechanical separation structure of the switch button and the PCB board. The switch button (that is, the mechanical switch) itself only has the function of triggering components to form a signal when it is pressed by the user, that is, the switch button itself has no inductive components and does not need to be electrically connected to the PCB board (usually a plug-in switch). Mounted or embedded on the PCB board), its function is to form a switch signal by triggering the sensing electronic components o...

AI Technical Summary

Problems solved by technology

At present, the existing technology is to use the vacuum coating process to process the surface of the inductive switch PCB to realize its waterproof and other functions. The vacuum coating process is to heat the waterproof material under high vacuum conditions to melt and evaporate it. The method of forming a waterproof film on the surface, this method takes a long time to accumulate the thickness of the film, the manufacturing cost is relatively high, and it is difficult to meet the environmental protection requirements, especially for the edge of the PCB board and the edge of the hole on the PCB board. to effective lamination

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