Patent
1990-07-30
1991-09-03
Larkins, William D.
357 15, 357 30, G11C 1928, H01L 2978
Patent
active
050459066
ABSTRACT:
A solid state image pickup device is fabricated on a semiconductor substrate and comprises a well formed in a surface portion of the semiconductor substrate, photo-electric converting regions arranged in rows and columns and converting parts on an optical radiation into electric charges, respectively, charge transferring regions associated with the columns of the photo-electric converting regions, respectively, and conveying the electric charges, charge transferring electrodes provided over the charge transferring regions and allowing the charge transferring regions to convey the electric charges, and a metallic photo-shield plate preventing the charge transferring regions each being contiguous to the channel forming region from the optical radiation and exposing the photo-electric converting regions to the parts of the optical radiation, in which the metallic photo-shield plate is in contact with the photo-electric converting regions for forming Schottky barriers therebetween and excess electric charges flow into the metallic photo-shield plate over the Schottky barriers.
REFERENCES:
patent: 4654683 (1987-03-01), Anagnostopoulos et al.
patent: 4977584 (1990-12-01), Kohno et al.
Larkins William D.
NEC Corporation
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