Metal treatment – Compositions – Heat treating
Patent
1980-07-08
1982-07-27
Roy, Upendra
Metal treatment
Compositions
Heat treating
148187, 219121LE, 219121LF, 357 91, 427 431, H01L 21263, B05D 306
Patent
active
043415695
ABSTRACT:
A beam of radiant energy such as a laser beam is applied to an epitaxial silicon island on a silicon on sapphire device before formation of overlying layers of oxide and metal. The energy beam changes the crystal structure of the epitaxial silicon island to increase the mobility of carriers in the silicon island, improving the speed of transistors formed on the silicon island. The energy beam also causes the material in the silicon island edge to reflow, causing a reduction in the slope of the edge face of the silicon island edge, and a smoothing of the surface of the face, resulting in improved aluminum step coverage and elimination of a V-shaped groove in the first insulation layer at the bottom corner edge of the island, thereby increasing processing yield.
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Harari Eliyahou
Hess LaVerne D.
Wang Samuel T.
Yaron Giora
Hughes Aircraft Company
MacAllister W. H.
Roy Upendra
Wallace Robert M.
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