US PATENT SUBCLASS 257 / 250
.~.~.~.~ Plural gate levels

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}
215  DF  .~ Charge transfer device {11}
245  DF  .~.~ Structure for applying electric field into device (e.g., resistive electrode, acoustic traveling wave in channel) {2}
249  DF  .~.~.~ Electrode structures or materials {1}
250.~.~.~.~ Plural gate levels

DEFINITION

Classification: 257/250

Plural gate levels:

(under subclass 249) Subject matter wherein the electrode structures include more than one level of gate electrodes relative to a main surface of the device.