Fixing structure of secondary hanger for plating PCB (Printed Circuit Board)

Abstract

The invention discloses a fixing structure of a secondary hanger for plating a PCB (Printed Circuit Board). The secondary hanger is capable of rotating around a first fixed point by setting two fixed points on the secondary hanger and setting two locating points on a copper medal; when the secondary hanger is rotated to the second fixed point and is overlapped with the first locating point on the copper medal, the secondary hanger is firmly connected with the copper medal; at the moment, the secondary hanger is vertically downwards for normal electroplating; when the secondary hanger is not fixed with a board, the secondary hanger is rotated to the second fixed point and is overlapped with the second locating point on the copper medal, and then the secondary hanger is firmly connected with the copper medal; at the moment, the secondary hanger is fixed horizontally; when in electroplating, the secondary hanger which is not fixed with the board is fixed horizontally, and the secondary hanger is prevented from soaking in electroplating liquid and participating the electroplating; therefore, the secondary hanger which is not fixed with the board is prevented from plating copper, the problem of copper slag can be effectively improved, the copper resource is saved, the uniformity of plating can be further guaranteed, and the product quality is improved.

Description

technical field [0001] The invention relates to a structural improvement of a hanger used for electroplating printed circuit boards, in particular to an improvement in the fixing structure of a secondary hanger on the hanger for electroplating. Background technique [0002] Electroplating is to immerse the plated part in the plating solution of metal salt as the cathode, and the conductor or semiconductor as the anode. After the power is turned on, the desired coating is deposited on the surface of the plated part. [0003] Electroplating is an essential part of the printed circuit board (PCB) production process. At present, in the electroplating production process of printed circuit boards, the hanger is an indispensable tool. Its main function is to fix the board to be electroplated and connect the electrode (cathode) so that the current is evenly transmitted to the board. The chemical principles plate the copper onto the surface of the board. Reasonable selection of han...

AI Technical Summary

Problems solved by technology

When the board is not fully hung with the hanger, the board is generally fixed on the secondary hanger located in the middle of the hanger, and the board is not fixed on the secondary hanger at both ends of the hanger. During electroplating, the secondary hanger and the board are immersed in the Electroplating in the electroplating solution, the secondary hanger without boards at both ends will also be plated with copper; and when the copper on the secondary hanger at both ends reaches a certain thickness, it will be in the form of copper particles from the secondary hanger The surface is detached, so that there is copper slag in the electroplating solution, which affects the quality of electroplating; and when the copper on the secondary racks at both ends is deposited to a certain thickness, the copper ions near the secondary racks at both ends will move to the middle. Cause uneven plating, so that the thickness of the coating on the boards near both ends is greater than the thickness of the coating on the middle board, thus affecting product quality

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