Chip-size packaging technology promises to help unfold a host of new super-miniature electronic products such as the camera-in-a-capsule recently developed for diagnosing gastrointestinal disorders. By swallowing the M2A imaging capsule as one would a regular pill, doctors can examine and record images transmitted by the capsule as it travels trough the gastrointestinal tract.
A key component of the tiny camera-in-a-capsule is a CMOS imager camera in which a silicon chip is encapsulated between two thin, transparent glass layers, resulting in what is said to be a true die-size package. Developed by ShellCase Ltd., the wafer-level, chip-size package (WLCSP) is said to be the only package available in such a small form-factor for optical devices. Called ShellOP, the WLCSP can be used to meld together image sensing, light detection and other circuitry to produce a wide variety of optical devices.
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