Imbalanced layered composite focal plane array structure

Details Imbalanced layered composite focal plane array structure Imbalanced layered composite focal plane array structure

1996-06-24

1998-02-03

Glick, Edward J.

Radiant energy

Invisible radiant energy responsive electric signalling

Infrared responsive

250332, 25037015, G01J 516

Patent

active

057147604

ABSTRACT:
A focal plane array (FPA) including a layered composite structure having several layers of materials with differing thermal expansion coefficients (TECs) and thicknesses to stabilize and maintain FPA performance during thermal cycling and excursions. An optical substrate is coupled to a multiplexer through a network of indium bumps. The typical TEC mismatch of the layered materials is offset by particularly selecting the types of materials used and the thicknesses of the individual layers of the FPA. Consequently, undesirable deflections and distortion of the multiplexer and the indium bumps are minimized, thereby substantially improving FPA reliability.

REFERENCES:
patent: 5308980 (1994-05-01), Barton
patent: 5585624 (1996-12-01), Asatourian
patent: 5600140 (1997-02-01), Asatourian
patent: 5610389 (1997-03-01), Asatourian

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