Smear reduction in CCD imagers

Details Smear reduction in CCD imagers Smear reduction in CCD imagers

1976-08-04

1977-08-02

Richardson, Robert L.

Facsimile and static presentation processing

Facsimile

Recording apparatus

250211R, 250578, 358223, H04N 530

Patent

active

040400921

ABSTRACT:
Radiation illuminating the A register of a charge-coupled device (CCD) imager of the field transfer type during the transfer of a field from the A to the B register results in smear in the reproduced image. Such smear is reduced in a rear surface illuminated imager by forming a depletion region at said rear surface during the A to B transfer time. Charge carriers which are excited in the substrate during this period preferentially remain at the rear surface where they are passed to a drain rather than flowing to the potential wells whose contents are being shifted from the A to the B register.

REFERENCES:
patent: 3576392 (1971-04-01), Hofstein
patent: 3934161 (1974-04-01), Caywood
patent: 3940602 (1976-02-01), Lagnado et al.

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