Semiconductor device including impurities in substrate via...

Active solid-state devices (e.g. – transistors – solid-state diode – Field effect device – Having insulated electrode

Reexamination Certificate

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C438S424000, C257S390000

Reexamination Certificate

active

07087960

ABSTRACT:
A gate oxide film and a first layer of a multilayered gate electrode are stacked on a substrate and by a gate prefabrication technique, an oxide layer of an element isolation region is formed in a self-alignment manner using the first layer of the gate electrode as a mask, impurities for a transistor channel control are doped by ion implantation via the first layer of the gate electrode and the gate oxide film, and the doped impurities are activated by a heating step, whereby an impurity profile at the transistor channel portion is precisely formed.

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