C - Chemistry – Metallurgy – 30 – B
Patent
C - Chemistry, Metallurgy
30
B
148/1
C30B 11/00 (2006.01)
Patent
CA 1214380
12 ABSTRACT: A method of simultaneously preparing a plurality of castings of a solution of an element or compound A in a solvent B which is an element and/or a compound, which solution is saturated at a temperature Ts. A problem in liquid epitaxy growth processes is the simple preparation of growth charges which are of sufficiently reproducible composition and size to produce epitaxial layers of repro- ducible composition and thickness. A melt 12 consisting of B, or of B together with at least one of the constituents of A, or of a solution of A in B which is unsaturated at Ts is prepared in a trough 5 of a boat body of a liquid-tight boat assembly 1. An equilibrium is established at Ts between the melt 12 and a solid body 13 which is an excess of any constituent in which the melt 12 is deficient with respect to the saturated solution, so as to form a saturated solution. The saturated solution is transferred into a plurality of moulds 9 in which this solution is allowed to solidify to form the castings. The solid body 13 is contained in a solid-retaining portion 6 of the trough 5, which portion 6 is separated from the remainder of the trough 5 by an aper- tured partition 8.
430511
Brice John C.
Brough Colin R.
Koninklijke Philips Electronics N.v.
Van Steinburg C.e.
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