US PATENT SUBCLASS 257 / 227
.~.~.~ With specified dopant (e.g., photoionizable, "extrinsic" detectors for infrared)

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}
225  DF  .~.~ Non-electrical input responsive (e.g., light responsive imager, input programmed by size of storage sites for use as a read-only memory, etc.) {6}
227.~.~.~ With specified dopant (e.g., photoionizable, "extrinsic" detectors for infrared)

DEFINITION

Classification: 257/227

With specified dopant (e.g., photoionizable, "extrinsic" detectors for infrared):

(under subclass 225) Subject matter wherein the non-electrical responsive device contains specific impurity dopants.