Nonvolatile semiconductor memory devices

Details Nonvolatile semiconductor memory devices Nonvolatile semiconductor memory devices

1975-08-25

1977-03-08

Wojciechowicz, Edward J.

357 54, H01L 2978, H01L 2934

Patent

active

040115763

ABSTRACT:
A nonvolatile semiconductor memory device of the type known as an insulated gate field effect transistor, in which a thick gate insulating layer overlaps the source and drain regions formed in a substrate. The surface of the substrate underlying the thick gate insulating layer is doped lightly with impurities having opposite conductivity relative to the substrate.

REFERENCES:
patent: 3747203 (1973-07-01), Shannon
patent: 3845327 (1974-10-01), Cricchi

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