US PATENT SUBCLASS 257 / 132
.~ Five or more layer unidirectional structure

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

107  DF  REGENERATIVE TYPE SWITCHING DEVICE (E.G., SCR, COMFET, THYRISTOR) {19}
132.~ Five or more layer unidirectional structure

DEFINITION

Classification: 257/132

Five or more layer unidirectional structure:

(under subclass 107) Subject matter wherein the regenerative active solid-state device has five or more layers of semiconductor material producing at least four active junctions, and is operable in a single electrical direction.