A kind of VCM shrapnel and its processing method

Abstract

The invention provides a VCM shrapnel and a processing method thereof. The method includes: performing first copper etching and glue etching on the surface of the copper layer of the VCM shrapnel body to form several blind holes; attaching dry film on both sides of the VCM shrapnel body, exposing After developing, open the dry film at the position of the blind hole; after electroplating copper in the blind hole, attach the dry film on both sides for the second time, and then carry out the second dry film exposure and development, copper etching, and remove the film; the third time is attached on both sides After drying the film, exposure and development are carried out to expose the pad position and the gold-plated pinch point to be plated. After the pad position is plated with gold, the surface dry film is removed to obtain a VCM shrapnel. In the present application, copper etching is performed on the surface of the copper layer to form an initial circuit including several blind holes, and then the copper layer and the steel sheet are electrically connected by electroplating copper in the blind holes, and the bottom sheet is passed on the surface of the copper layer. The way of exposure and development exposes the pad positions to be gold-plated and the gold-plated pinch points, and more electronic components can be mounted on the pad positions to achieve more functions.

Description

technical field [0001] The invention relates to the field of medical supplies, in particular to a VCM shrapnel and a processing method thereof. Background technique [0002] There are many ways to realize automatic focus of mobile phone camera. VCM (Voice Coil Motor, voice coil motor) is the current mainstream solution. VCM is mainly composed of coil, magnet group and shrapnel. The coil is fixed in the magnet group by the front and rear shrapnel. When the coil is energized, the coil generates a magnetic field, the coil magnetic field interacts with the magnet group, the coil moves, and the lens mounted in the coil moves along with it, changing the focal length or image distance of the lens and the angle of view of the lens; when the power is off, the coil Under the elastic force of the front and rear two shrapnel, it returns to the initial position, so as to realize the automatic focusing function. [0003] With the continuous improvement of user needs, auxiliary functions ...

AI Technical Summary

Problems solved by technology

However, in terms of structural design, conventional VCM shrapnel usually only has one layer of steel sheet, which does not have the conditions to mount other components on its surface, or can only mount a small number of components, and the auxiliary functions that can be realized are very limited.

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