Imaging, device, elements and systems

Details Imaging, device, elements and systems Imaging, device, elements and systems

1980-04-30

1989-01-31

Buczinski, Stephen C.

Radiant energy

Infrared-to-visible imaging

250332, 25037001, 357 30, G02F 101, H01L 2500

Patent

active

048018023

ABSTRACT:
Thermal-radiation imaging devices, elements and systems are described. The device comprises on a substrate (2) e.g. of sapphire semiconductor bodies or body portions in the form of parallel elongate strips (1), e.g. of cadmium mercury telluride. Biasing-electrode means (6 and 7) e.g. of gold are spaced on the strips (1) for causing a bias current predominantly of majority charge carriers to flow along each strip (1). The bias current supports an ambipolar drift of radiation-generated free minority carriers in the opposite direction. At the area of read-out means (8) in the drift path each strip (1) branches into two parts separated by a slot (13) parallel to the strip (1). One part (11 in FIG. 2) provides the continuation of the drift path, while a read-out connection comprises the other part (12 in FIG. 2) and is separated by the slot (13) from the adjacent biasing-electrode means (6 or 7). Metal layers (6, 7, 8) providing the biasing-electrode and read-out connections may extend onto the substrate (2) over a more rounded edge at the ends of each strip (1).

REFERENCES:
patent: 4062107 (1977-12-01), Blackman et al.

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