Method of forming a vertical MOS transistor

Semiconductor device manufacturing: process – Making field effect device having pair of active regions... – On insulating substrate or layer

Reexamination Certificate

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C438S157000

Reexamination Certificate

active

06949421

ABSTRACT:
A vertical MOS transistor has a very short channel length that is indirectly defined by the thickness of a layer of semiconductor material or the depths of implants. The transistor has a first (source/drain) region formed in a substrate material, a semiconductor region formed on the first region, and a second (source/drain) region formed in the top surface of the semiconductor region. The distance between the first region and the second region defines the channel length of the transistor.

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