Heterostructure interdigital high speed photoconductive detector

Details Heterostructure interdigital high speed photoconductive detector Heterostructure interdigital high speed photoconductive detector

1986-02-11

1987-09-29

Chaudhuri, Olik

Fishing, trapping, and vermin destroying

437176, 437184, 437185, H01L 21283, H01L 2112, H01L 3102

Patent

active

046966480

ABSTRACT:
A high speed photoconductive detector is disclosed which comprises two interdigital electrically conducting electrodes formed on a photoconductive layer. The device speed and sensitivity are improved by using a double-heterostructure configuration comprising an active layer formed on an isolation layer in turn formed on a supporting substrate. A passivation layer is formed on the active layer. This configuration confines the generated carriers to the active layer. Consequently, current will be induced under optical illumination due to photo-carrier generation. This interdigitated geometry allows for a large device cross-section and small carrier transit distance.

REFERENCES:
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patent: 4021836 (1977-05-01), Andrews, II et al.
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patent: 4213138 (1980-07-01), Campbell et al.
patent: 4346394 (1982-08-01), Figueroa et al.
patent: 4376285 (1983-03-01), Leonberger et al.

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