Trench formation in a semiconductor material

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

Reexamination Certificate

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C257SE21564

Reexamination Certificate

active

07879663

ABSTRACT:
A semiconductor device is formed on a semiconductor layer. A gate dielectric layer is formed over the semiconductor layer. A layer of gate material is formed over the gate dielectric layer. The layer of gate material is patterned to form a gate structure. Using the gate structure as a mask, an implant into the semiconductor layer is performed. To form a first patterned gate structure and a trench in the semiconductor layer surrounding a first portion and a second portion of the semiconductor layer and the gate, an etch through the gate structure and the semiconductor layer is performed. The trench is filled with insulating material.

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