Silicon wafer excelling in gettering ability and method for prod

Active solid-state devices (e.g. – transistors – solid-state diode – Non-single crystal – or recrystallized – semiconductor...

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437 12, 257635, 257913, H01L 2336, H01L 2904, H01L 21306

Patent

active

051895080

ABSTRACT:
A silicon wafer comprising a substrate of single crystal silicon, a silicon oxide film 1 to 8 .ANG. in thickness formed on one surface of said substrate, and a polysilicon layer formed on said silicon oxide film and possessing an excellent gettering ability, is prepared by oxidizing single crystal silicon, thereby forming a silicon oxide film 1 to 8 .ANG. in thickness on said surface, and exposing said silicon oxide film to a gaseous silane at an elevated temperature, thereby forming a polysilicon layer on said silicon oxide film.

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patent: 4631804 (1986-12-01), Roy
patent: 4675715 (1987-06-01), Lepselter
patent: 4828629 (1989-05-01), Ikeda et al.

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