US PATENT SUBCLASS 257 / 645
.~.~.~ Insulating layer containing specified electrical charge (e.g., net negative electrical charge)

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

629  DF  WITH MEANS TO CONTROL SURFACE EFFECTS {4}
632  DF  .~ Insulating coating {8}
635  DF  .~.~ Multiple layers {8}
645.~.~.~ Insulating layer containing specified electrical charge (e.g., net negative electrical charge)

DEFINITION

Classification: 257/645

Insulating layer containing specified electrical charge (e.g., net negative electrical charge):

(under subclass 635) Subject matter wherein the multiple

insulating layers, or at least one of the insulating layers, has a specified electrical charge.