Infrared detector and method

Details Infrared detector and method Infrared detector and method

1989-10-06

1992-09-01

Buczinski, Stephen C.

Radiant energy

Infrared-to-visible imaging

Including detector array

25037008, 25037013, 2503384, 357 30, 357 90, 437 5, H01L 2500, H01L 2714, G01T 2400

Patent

active

051441381

ABSTRACT:
Photocapacitive detectors with varying bandgap Hg.sub.1-x Cd.sub.x Te (604) for two color detection and one color detection with increased potential well capacity. Preferred embodiments include a transparent insulated gate (608) on a top layer (632) of Hg.sub.0.8 Cd.sub.0.2 Te over a lower layer (634) of Hg.sub.0.83 Cd.sub.0.27 Te for detection of two infrared colors by varying gate potential to either confine the potential well to the top layer or to extend the potential well to both layers. Also, methods of compositionally grading the Hg.sub.1-x Cd.sub.x Te by fluid transport plus diffusion.

REFERENCES:
patent: 3889284 (1975-06-01), Schiel
patent: 4024569 (1977-05-01), Hawrylo et al.
patent: 4383269 (1983-05-01), Capasso
patent: 4599632 (1986-07-01), Bethea et al.
patent: 4684812 (1987-08-01), Tew et al.
patent: 4764261 (1988-08-01), Ondris et al.

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