US PATENT SUBCLASS 257 / 638
.~.~.~ With discontinuous or varying thickness layer (e.g., layer covers only selected portions of semiconductor)

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}
638.~.~.~ With discontinuous or varying thickness layer (e.g., layer covers only selected portions of semiconductor)

DEFINITION

Classification: 257/638

With discontinuous or varying thickness layer (e.g., layer covers only selected portions of semiconductor):

(under subclass 635) Subject matter wherein there are

discontinuous or varying thickness layers in at least one of the multiple insulating layers over the semiconductor body.