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Characteristics of the overlaid charge-coupled device

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1 Author(s)
Barsan, M.Radu ; Research Institute for Electronic Components, Bucharest, Romania

A novel charge-coupled device structure (the overlaid CCD) is described. It operates by transferring charge packets on two distinct levels which are overlaid in the semiconductor bulk. This bulk-integrated device has an increased density per unit area and a reduced driving power consumption per bit compared to conventional buried-channel CCD's still enjoying bulk-channel operation. Furthermore, the overlaid CCD can be employed to perform certain operations that could otherwise be performed only at greater expense. The price to be paid is a smaller charge-carrying capacity of the deeper laying transfer level. The operational characteristics of the overlaid CCD are investigated by means of analytic, as well as two-dimensional numerical calculations. Emphasis is laid upon assessing the distinguishing features of the device and evaluating the relative influences of the design parameters on the operational performances.

Published in:

Electron Devices, IEEE Transactions on  (Volume:26 ,  Issue: 2 )