Radiant energy – Invisible radiant energy responsive electric signalling – Infrared responsive
Patent
1997-04-02
1999-01-19
Hannaher, Constantine
Radiant energy
Invisible radiant energy responsive electric signalling
Infrared responsive
25037013, 257191, H01L 2714, H01L 3118, H01L 21304
Patent
active
058616268
ABSTRACT:
A multiple film integrated infrared (IR) detector assembly 85 consists of detector films 86, 88, 90 having different IR spectral sensitivities which are deposited on a breadboard IR transmissive but electrically insulating substrate 42. Substrate 42 is deposited on an IR filter layer comprising an HgCdTe film 70. By various techniques described, filter film 70 has a varying composition from edge 68 to 72. This compositional gradient of film 70 results in varying IR spectral absorption as shown by IR transmission graphs 10, 12, 14. Film 70 acts as a graded IR filter in concert with the response of the detector films 86, 88, 90. By the proper choice of the compositional gradients in these films, and as a result the IR spectral response, an integrated IR spectrometer may be fabricated whereby each detector 86, 87, 90 detects only specific narrow bands of IR wavelengths.
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Chandra Dipankar
Penn Thomas C.
Weirauch Donald F.
Hannaher Constantine
Raytheon TI System, Inc.
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