Method of fabricating a laterally continuously graded mercury ca

Details Method of fabricating a laterally continuously graded mercury ca Method of fabricating a laterally continuously graded mercury ca

1997-04-02

2000-03-14

Kunemund, Robert

Single-crystal, oriented-crystal, and epitaxy growth processes;

Processes of growth with a subsequent step acting on the...

117 3, 117 54, 117957, C30B 3302

Patent

active

060367709

ABSTRACT:
Methods are described for the depositing of a plurality of films, preferably mercury cadmium telluride (HgCdTe), whose compositions vary in a controlled manner to provide unique infrared spectral absorption and detection properties. HgCdTe films 64 and 70 are deposited on opposite sides of electrically insulating, IR transmissive film 42. Initially these HgCdTe films may be of uniform composition laterally from 62 to 66 and 68 to 72. However the interdiffusion and segregation coefficients of Hg and Cd are different and vary differently with respect to temperature. By placing film 70 in contact with heater 9, a controlled lateral gradient in composition of the film may be effected because 44 is hotter than 45 and will produce higher Cd concentration at 68 than 72. Similarly 62 will be higher in Cd than 66, however, the gradient will be much less because 64 is cooler than 70. Through the use of a heater 60, the lateral compositional gradient of 64 may be varied with respect to film 70. The close tracking of the IR properties of 70 and 64 can provide useful and novel integrated IR devices such as multiple band spectrometers.

REFERENCES:
patent: 4296324 (1981-10-01), Kern et al.
patent: 4370557 (1983-01-01), Axmark et al.
patent: 4376659 (1983-03-01), Castro
patent: 4607272 (1986-08-01), Osbourn
patent: 4639756 (1987-01-01), Rosbeck et al.
patent: 4691196 (1987-09-01), Kern et al.
patent: 4769775 (1988-09-01), Kern et al.
patent: 4785292 (1988-11-01), Kern et al.
patent: 4965649 (1990-10-01), Zanio et al.
patent: 5049962 (1991-09-01), Huang et al.
patent: 5192695 (1993-03-01), Wang et al.
patent: 5302232 (1994-04-01), Ebe et al.
patent: 5391882 (1995-02-01), Rhiger
patent: 5449927 (1995-09-01), Hamilton, Jr. et al.
patent: 5459321 (1995-10-01), Bartoli et al.
patent: 5479018 (1995-12-01), McKee et al.
patent: 5510644 (1996-04-01), Harris et al.
patent: 5559336 (1996-09-01), Kosai et al.
patent: 5581117 (1996-12-01), Kawano
patent: 5633527 (1997-05-01), Lear
patent: 5861626 (1999-01-01), Chandra et al.
T. Tung Journal of Crystal Growth, (Netherlands), vol. 86, pp. 161-72 (1988).

Affiliated with

Also associated with

Rating

Method of fabricating a laterally continuously graded mercury ca does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method of fabricating a laterally continuously graded mercury ca, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of fabricating a laterally continuously graded mercury ca will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-165028