Printed circuit board cleaning method, printed circuit board and circuit board clamp

Abstract

The invention discloses a printed circuit board cleaning method, a printed circuit board and a circuit board clamp. The cleaning method comprises the steps of first washing, pre-neutralization treatment, second washing, neutralization treatment and third washing. In a three-stage washing cylinder, a middle-stage washing cylinder is used for pre-neutralization treatment. The cleaning method is characterized in that an isolation air cushion is arranged in the middle-stage washing cylinder and a pre-neutralization container is arranged in the isolation air cushion before pre-neutralization treatment, the isolation air cushion can support the pre-neutralization container and isolate the pre-neutralization container from the middle-stage washing cylinder, and a corrosion-resistant coating is arranged on the inner wall of the pre-neutralization container; and the pre-neutralization container is filled with a pre-neutralization liquid medicine used for removing copper powder / residues on the surface of a printed circuit board, and the pre-neutralization liquid medicine comprises an acid solution and an oxidizing agent / reducing agent. According to the circuit board cleaning method, copper powder, dregs and the like attached to the surface of a printed circuit board can be removed, and the reliability of a manufactured printed circuit board is improved.

Description

technical field [0001] The invention belongs to the technical field of printed circuit boards, and in particular relates to a cleaning method for printed circuit boards, printed circuit boards and circuit board fixtures. Background technique [0002] CN 104519664B discloses a cleaning method for printed circuit boards and printed circuit boards, and the cleaning method for printed circuit boards includes placing the printed circuit boards in a neutralization cylinder and performing neutralization treatment through neutralization liquid , so as to remove the residues remaining on the surface of the printed circuit board due to the chemical deglue process, the method also includes: before performing the neutralization treatment, placing the printed circuit board in at least one pre-center and in the tank, to correspondingly perform at least one pre-neutralization treatment; wherein, the copper powder on the surface of the printed circuit board is removed through the pre-neutra...

AI Technical Summary

Problems solved by technology

[0004] However, cleaning is carried out by this cleaning method. The open patent is to improve the design on the basis of the existing three-stage water washing tank. The acid solution contained in the water washing tank is very serious, especially for the ultrasonic ring energy device in the washing tank.

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