Annealing method

Details Annealing method Annealing method

1989-09-15

1991-07-02

Straub, Gary P.

Adhesive bonding and miscellaneous chemical manufacture

Delaminating processes adapted for specified product

Delaminating in preparation for post processing recycling step

156DIG72, 156DIG73, 156DIG82, C30B 3108, C30B 3112

Patent

active

050282964

ABSTRACT:
A three step annealing treatment for Hg.sub.1-x Cd.sub.x Te includes a high temperature anneal to reduce excess tellurium, followed by an intermediate temperature anneal to reduce the supersaturation of metal vacancies, and lastly a low temperature anneal to reduce metal vacancies; see FIG. 4. The intermediate anneal reduces the metal vacancy concentration sufficiently that microvoids do not form from condensation of metal vacancies in desired portions of the Hg.sub.1-x Cd.sub.x Te during the low temperature anneal. Alternate preferred embodiments include more than three steps and incremental cooling.

REFERENCES:
patent: 4190486 (1980-02-01), Kyle
patent: 4481044 (1984-11-01), Schaake et al.
patent: 4536227 (1989-08-01), Brice et al.
patent: 4866007 (1989-09-01), Taguchi et al.

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