| 摘要 |
A method for manufacturing camera modules for use in portable electronic devices, such as mobile phones, is provided. More specifically, in camera modules utilizing lens motion type auto focus actuation, permanent magnets associated with voice coil motors utilized in the auto focus system, generate magnetic flux that can interfere with the process of bonding image sensors to camera modules if the permanent magnets of different voice coil motors are positioned too closely. Incorporating a magnetic shield into the manufacturing process to restrain or control the magnetic flux generated by the permanent magnets permits voice coil motors to be positioned closer together during the manufacturing process. This increases manufacturing throughput and reduces cost. |
| 主权项 |
1. A method of manufacturing camera modules, each comprising a voice coil module, a lens and an image sensor, the method comprising:
providing a first voice coil module and a second voice coil module, wherein each of the first and second voice coil modules comprises a yoke, including a permanent magnet, an electromagnet, a frame, and a lens, the lens movable within the frame and the yoke under the influence of the permanent magnet and the electromagnet; providing a substrate with a plurality individual of image sensors affixed to the substrate, each image sensor having a perimeter; applying an adhesive to the substrate proximate to the perimeter of the image sensors; positioning the first voice coil module to adhere to the substrate proximate to the perimeter of a first image sensor; associating a first magnetic shield with the first voice coil module to reduce the magnetic flux exiting the first voice coil module; positioning a second voice coil module to adhere to the substrate proximate to the perimeter of a second image sensor, the first and second image sensors being adjacent to each other on the substrate; associating a second magnetic shield with the second voice coil module to reduce the magnetic flux exiting the second voice coil module; wherein the first and second magnetic shields prevent interaction between the permanent magnets in the first and second voice coil modules; and wherein, the distance between the first and second voice coil modules on the substrate may be reduced due to the presence of the first and second magnetic shields and the total number of voice coil modules positioned on a substrate is increased. |
