Adhesive bonding and miscellaneous chemical manufacture – Delaminating processes adapted for specified product – Delaminating in preparation for post processing recycling step
Patent
1981-06-19
1983-12-06
Bernstein, Hiram H.
Adhesive bonding and miscellaneous chemical manufacture
Delaminating processes adapted for specified product
Delaminating in preparation for post processing recycling step
156624, 156DIG88, 136261, C30B 2960
Patent
active
044191782
ABSTRACT:
A process for growing an epitaxial ribbon of mono-crystalline material involves formation of an endless belt of monocrystalline composition. The belt is driven about a closed path to bring portions sequentially to epitaxial growth and ribbon stripping zones. One or more epitaxial layers of monocrystalline material at least initially compositionally different from the belt are grown on the belt in the epitaxial growth zone(s). Stripping of such epitaxial layer(s) occurs in the stripping zone to form an epitaxial ribbon of indefinite length. Finally, the ribbon is wound upon a mandrel for storage or transport before further processing. The belt is formed by slicing a boule into flat strips of uniform thickness, their ends being then beveled to preselected crystallographic orientation. Ends of the strips are juxtaposed, defining a notch between them. Material is epitaxially grown on the beveled end surfaces to fill each notch. Excess grown material is polished to coincident flatness, providing an elongated belt of uniform thickness with beveled ends. They are juxtaposed then by bending the belt within critical bending limit rules to define a final notch which similarly is filled by further epitaxial growth. Excess material thickness is polished to coincident flatness to provide a constant thickness endless belt.
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