Adhesive bonding and miscellaneous chemical manufacture – Delaminating processes adapted for specified product – Delaminating in preparation for post processing recycling step
Patent
1974-12-11
1977-01-04
Emery, Stephen J.
Adhesive bonding and miscellaneous chemical manufacture
Delaminating processes adapted for specified product
Delaminating in preparation for post processing recycling step
156DIG71, 23273SP, 23302R, 423 65, 423184, 156622, B01J 1720, C01D 1102, C01G 3500, C01G 5700
Patent
active
040010767
ABSTRACT:
Thin film epitaxial layers of mixed oxide compounds, or of solid solutions of two mixed oxides, are deposited on a suitable single crystal substrate. Growth is achieved by introducing the substrate into a crucible containing a saturated solution of the oxide(s) in a molten alkali metal halide having additional undissolved oxide(s) present in the crucible. Evaporation of the alkali metal halide solvent produces and/or maintains the supersaturated condition, which is relieved by epitaxial deposition of the oxide(s) onto the substrate. When two mixed oxides are dissolved in the solvent, the composition of the film is determined and fixed by the temperature of growth. To produce a thin film of a constant composition, growth is conducted isothermally. To produce a thin film with a graded composition throughout its thickness, growth is conducted by slowly cooling the temperature of the solution. Excess, undissolved oxide is kept in a region of the crucible such that the undissolved oxide is several degrees hotter than the liquid in contact with the substrate. This condition results in additional oxide dissolving in the solvent as elsewhere the oxide is being deposited onto the substrate. This method of epitaxial growth provides good control of both the film composition and the film thickness.
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Powazinik William
Robinson Lawrence B.
Emery Stephen J.
GTE Laboratories Incorporated
Kriegsman Irving M.
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