1988-07-27
1991-07-30
James, Andrew J.
357 52, 357 55, 357 61, H01L 2714, H01L 2934, H01L 2906
Patent
active
050363760
ABSTRACT:
A method of passivation of Hg.sub.1-x Cd.sub.x Te and similar semiconductors by surface oxidation (such as anodic) followed by chemical conversion of the oxide to either sulfide or selenide or a combination of both is disclosed. Preferred embodiments provide sulfide conversion by immersion of the oxide coated Hg.sub.1-x Cd.sub.x Te in a sodium sulfide solution in water with optional ethylene glycol and the selenidization by immersion in a solution of sodium selenide plus sodium hydroxide in water and ethylene glycol. Also, infrared detectors incorporating such sulfide and selenide passivated Hg.sub.1-x Cd.sub.x Te are disclosed.
REFERENCES:
patent: 3258663 (1966-06-01), Weimer
patent: 4275407 (1981-06-01), Lorenze, Jr.
patent: 4447291 (1984-05-01), Schulte
patent: 4654686 (1987-03-01), Borrello
Chin et al., "High-Performance Backside-Illuminated Hg.sub.0.78 Cd.sub.0.22 Te/CdTe(.lambda..sub.co =10 .mu.m) Planar Diodes", pp. 486 to 488, Applied Physics Letters, Sep. 1980.
Little D. Dawn
Teherani Towfik H.
Comfort James T.
James Andrew J.
Merrett N. Rhys
Ngo Ngan Van
Sharp Melvin
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