Adhesive bonding and miscellaneous chemical manufacture – Delaminating processes adapted for specified product – Delaminating in preparation for post processing recycling step
Patent
1982-01-06
1984-11-06
Bernstein, Hiram H.
Adhesive bonding and miscellaneous chemical manufacture
Delaminating processes adapted for specified product
Delaminating in preparation for post processing recycling step
156DIG61, 156DIG70, C30B 710
Patent
active
044810695
ABSTRACT:
Large single crystals of berlinite are grown onto seed crystals by maintaining the crystals at a fixed elevated temperature in a pressure vessel containing a nutrient of coarse berlinite crystalline powder, held at a fixed lower temperature, and a mixture of hydrochloric and phosphoric acids. Because berlinite shows retrograde solubility in the acid mixture, the nutrient goes into solution, and berlinite deposits on the higher-temperature growing crystal. Large single crystals of alpha-gallium orthophosphate may be grown using the same apparatus and a similar process. The resultant crystals may be cut into wafers useful in surface acoustic wave devices.
REFERENCES:
patent: 2675303 (1954-04-01), Sobek et al.
patent: 4247358 (1981-01-01), Auloin et al.
patent: 4300979 (1981-11-01), Kolb et al.
patent: 4382840 (1983-05-01), Chai et al.
Jl. of Crystal Growth, 51, (1981), 178-182, Kolb et al.
Buehler Ernest
Chai Bruce H.
Flynn John J.
Allied Corporation
Bernstein Hiram H.
Fuchs Gerhard
Riesenfeld James
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