US PATENT SUBCLASS 257 / 571
.~.~.~ Non-planar structure (e.g., mesa emitter, or having a groove to define resistor)

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

565  DF  BIPOLAR TRANSISTOR STRUCTURE {11}
566  DF  .~ Plural non-isolated transistor structures in same structure {2}
567  DF  .~.~ Darlington configuration (i.e., emitter to collector current of input transistor supplied to base region of output transistor) {6}
571.~.~.~ Non-planar structure (e.g., mesa emitter, or having a groove to define resistor)

DEFINITION

Classification: 257/571

Non-planar structure (e.g., mesa emitter, or having a groove to define resistor):

(under subclass 567) Subject matter wherein the device is a non-planar structure (i.e., the upper surface is not a completely flat, unbroken surface).