Charge-coupled device with lowering of transfer potential at out

Details Charge-coupled device with lowering of transfer potential at out Charge-coupled device with lowering of transfer potential at out

1988-12-21

1989-10-10

Munson, Gene M.

Electrical pulse counters, pulse dividers, or shift registers: c

Counting or dividing in incremental steps

Beam type tube

377 61, H01L 2978, G11C 1928

Patent

active

048735620

ABSTRACT:
Disclosed are a charge-coupled device with lowering of output potential as well as a method for the fabrication of this device. In a known way, the device comprises, upstream on a semiconducting substrate with a first type of doping (P), a semiconducting layer with a second type of doping (N) and an insulating layer covering the former layer. Pairs of electrodes are formed on the insulating layer. Each pair has a transfer electrode and a storage electrode. Zones with a third type of doping N.sup.+) are made in the layer of a second type (N). A layer with a third type of doping (N.sup.-) is made downstream, in the layer with a second type of doping, and, downstream, there is formed at least one other pair of additional transfer and storage electrodes. A zone with a fourth type of doping (N.sup.--) is made beneath the additional transfer electrode in the layer with a third type of doping (N.sup.-). This pair of additional electrodes and the zone with a fourth type of doping make it possible to obtain the lowering of transfer potential at output.

REFERENCES:
patent: 3796932 (1974-03-01), Amelio et al.
patent: 3852799 (1974-12-01), Walden
patent: 4206371 (1980-06-01), Weimer
patent: 4262217 (1981-04-01), Levine
patent: 4580155 (1986-04-01), Tsoi et al.
patent: 4621369 (1986-11-01), Narabu et al.
patent: 4625322 (1986-11-01), Tukazaki et al.
patent: 4777519 (1988-10-01), Oshima
patent: 4807037 (1989-02-01), Iesaka et al.

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