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News

Miniature camera modules from OKI Electric.

Oki Electric Industry : 08 November, 2007  (New Product)
Ultra small cameras for mobile phones can also be used in image sensors.
Oki Electric Industry has started a contract assembly service for W-CSP (Wafer level Chip Sized Package) semiconductors using through-hole technology. With this technology, OKI's customers such as sensor and camera module manufacturers can now obtain camera modules that are half the size of conventional modules. In September, OKI established a volume production line for through-whole technology based W-CSP assembly at its production site in Tokyo and started operation in October.

"OKI is currently one of the industry's largest-scale manufacturers of W-CSP technology, packaging LSIs of a size equivalent to the semiconductor chip itself. Based on the through-hole W-CSP technology, manufacturers can make smaller camera modules, responding to trends such as the steadily shrinking size of mobile equipment," said Takaki Yamada, President of Silicon Microdevice Company at Oki Electric Industry. "We plan to increase the production level to 10,000 wafers per month within the fiscal year ending March 2009 and are considering increasing up to 20,000 wafers per month by the fiscal year ending March 2010, taking the expected demand increase into consideration."

In order to miniaturize a camera module, it is necessary to miniaturize the image sensor in the camera module. OKI's new W-CSP technology includes creating a through-hole in the silicon substrate such as an image sensor, and putting an electrode through the hole. By using this technology on the image sensor, users can eliminate wire bonding for camera modules and thus, reduce the size. OKI also adopts a low-profile cover glass on the image sensor, enabling manufacturers to make a module thinner than conventional ones.

Going forward, in addition to semiconductor assembly, OKI will launch a contract manufacturing service for making ultra small camera modules as part of OKI's e-functional module business.
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