Browse Prior Art Database

Control Charged Device Shift Register

IP.com Disclosure Number: IPCOM000077876D
Original Publication Date: 1972-Oct-01
Included in the Prior Art Database: 2005-Feb-25
Document File: 2 page(s) / 29K

Publishing Venue

IBM

Related People

Tartamella, JD: AUTHOR

Abstract

The size of the electrodes in a control-charged device (CCD) shift register using devices of low efficiency, are decreased from one end of the shift register to the other, to enable increasing the density of the shift registers when they are fabricated.

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Control Charged Device Shift Register

The size of the electrodes in a control-charged device (CCD) shift register using devices of low efficiency, are decreased from one end of the shift register to the other, to enable increasing the density of the shift registers when they are fabricated.

In a CCD shift register, only a portion of the charge which is introduced at the input stage ever reaches the final receiver or output stage. Therefore, the electrodes may be decreased in area from the beginning of the shift register to the end of the shift register.

Two ways of doing this are shown, the only restriction being that all the electrodes have to be larger than the photolithographic minimum, so that you end up with a sufficient amount of charge for sensing purposes.

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