Plastic and nonmetallic article shaping or treating: processes – Vacuum treatment of work – To degas or prevent gas entrapment
Patent
1978-11-13
1980-11-04
Parrish, John A.
Plastic and nonmetallic article shaping or treating: processes
Vacuum treatment of work
To degas or prevent gas entrapment
264332, C04B 3550
Patent
active
042319811
ABSTRACT:
Embodiments of a method are disclosed for producing large size cadmium mercury telluride (CMT) sputtering targets of a homogeneous composition. Sputtering targets of CMT having a general formula Cd.sub.x Hg.sub.1-x Te wherein x has values in the range of about 0.14 to 0.60 are prepared by compacting finely divided CMT of a particle size smaller than 150.mu. in a die into a coherent compact having a density of at least 97% theoretical density. CMT with an x value of about 0.14 to about 0.20 preferably is compacted at a die preheat temperature of about 100 to 300.degree. C. and at a compacting pressure of at least about 400 MPa. CMT having an x value of about 0.20 to about 0.60 preferably is compacted at a die preheat temperature of about 300.degree. C. and a compacting pressure of about 160 to 275 MPa. The die may be evacuated to a pressure of less than about 133 Pa absolute prior to compacting.
REFERENCES:
patent: 3558351 (1971-01-01), Foster
patent: 3956452 (1976-05-01), Saito
Zozime et al., "Sputtering of Cd.sub.x Hg.sub.1-x Te Films in Mercury Vapor Plasma", Thin Solid Films, 13(1972) 373-378.
Hirsch Horst E.
Smyth Robert W.
Cominco Ltd.
Delbridge Robert F.
Fors Arne I.
Parrish John A.
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