US PATENT SUBCLASS 257 / 405
.~.~.~ With gate insulator containing specified permanent charge

Current as of: June, 1999
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257 /   HD   ACTIVE SOLID-STATE DEVICES (E.G., TRANSISTORS, SOLID-STATE DIODES)

213  DF  FIELD EFFECT DEVICE {6}
288  DF  .~ Having insulated electrode (e.g., MOSFET, MOS diode) {17}
402  DF  .~.~ With permanent threshold adjustment (e.g., depletion mode) {3}
405.~.~.~ With gate insulator containing specified permanent charge {1}
406  DF  .~.~.~.~> Plural gate insulator layers

DEFINITION

Classification: 257/405

With gate insulator containing specified permanent charge:

(under subclass 402) Subject matter wherein the device has a gate insulator with a specified permanent electrostatic charge therein.