VCM elastic sheet and processing method thereof

Abstract

The invention provides a VCM elastic sheet and a processing method thereof. The method comprises the steps of carrying out the first copper etching and glue etching on the surface of a copper layer ofa VCM elastic sheet body, and forming a plurality of blind holes; attaching dry films to the two sides of the VCM elastic sheet body, and opening the dry films at the blind holes after exposure and development; attaching dry films to the two faces of the blind hole for the second time after copper electroplating is conducted in the blind hole, and then carrying out second-time dry film exposure development, copper etching and film stripping; and carrying out exposure and development after dry films are attached to the two sides for the third time, exposing a bonding pad position to be platedwith gold and gold-plated clamping points, and removing the dry films on the surface after gold is plated on the bonding pad position to obtain the VCM elastic sheet. According to the invention, copper etching is carried out on the surface of the copper layer, an initial circuit comprising the plurality of blind holes is formed, and then a copper layer and a steel sheet are conducted in a manner of electroplating copper in the blind holes, and the bonding pad position to be plated with gold and the gold-plated clamping points are exposed on the surface of the copper layer in a manner of exposing and developing a negative film, so that more electronic elements can be mounted on the bonding pad position to realize 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 the autofocus of the mobile phone camera. VCM (Voice Coil Motor) is the current mainstream solution. The VCM is mainly composed of a coil, a magnet group and a shrapnel. The coil is fixed in the magnet group through the front and rear two 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 viewing angle of the lens; when the power is off, the coil Return to the initial position under the elastic force of the front and rear two shrapnels, so as to realize the auto-focus function. [0003] With the continuous improvement of user needs, auxiliary functions such as f...

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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