Near-surface thermal gradient enhancement with opaque coatings

摘要

A thin opaque layer of material is deposited on one or both major opposed surfaces of a semiconductor wafer to enhance establishing a thermal gradient near the major surface or surfaces to produce straight, fine molten wires (<0.002'') of a metal by migration of a melt of the metal through a solid, or matrix, both of semiconductor material by thermal gradient zone melting processing along a thermal gradient established and maintained aligned substantially parallel with a preferred crystal axis of migration by thermal gradient zone melting processing.