Method of making trench MOS-gated device with a minimum number o

Semiconductor device manufacturing: process – Making field effect device having pair of active regions... – Having insulated gate

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438589, H01L 21336

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active

057563861

ABSTRACT:
A low-voltage high-current discrete insulated-gate field-effect transistor which is made by a very economical process with two silicon etches. A buried poly gate gates conduction along a trench sidewall. The channel is provided by the residuum of an epi layer, and the source diffusion is provided by an unmasked implant which is screened only by various grown oxides.

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