METHOD FOR MANUFACTURING CAMERA MODULE DIAPHRAGM BY USING PRESS BLANKING

摘要

The present invention relates to a method for manufacturing a camera module diaphragm by using press blanking and, more specifically, to a technology wherein, in connection with manufacturing a washer-type diaphragm applied to a camera of a mobile terminal such as a smartphone, a press blanking process is used such that the defective ratio can be reduced, and a precise finish can be made. Particularly, the present invention comprises: a material preparing step of preparing a thin plate made of copper; a diaphragm forming step of forming multiple washer shapes in the thin plate through press blanking; an alien substance removing step of washing the thin plate having diaphragms formed therein; an electropolishing step of connecting a positive electrode (+) to the thin plate having diaphragms formed therein, connecting a negative electrode (-) to a metal plate disposed to face the part having burrs formed thereon, and supplying an electric current while same are immersed in an electrolyte, in order to remove burrs formed in the diaphragm forming step; a primary plating step of plating the thin plate that has undergone the electropolishing by using copper cyanide; a secondary plating step of blackening the thin plate that has undergone the primary plating step; a coating step of forming an oil film on the thin plate that has undergone the secondary plating step, and finally washing same; and a drying step of drying the coated thin plate in a drying machine.