US PATENT SUBCLASS 257 / 215
.~ Charge transfer device

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.~ Charge transfer device {11}
216  DF  .~.~> Majority signal carrier (e.g., buried or bulk channel, or peristaltic) {5}
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}
235  DF  .~.~> Electrical input {2}
239  DF  .~.~> Signal charge detection type (e.g., floating diffusion or floating gate non-destructive output)
240  DF  .~.~> Changing width or direction of channel (e.g., meandering channel)
241  DF  .~.~> Multiple channels (e.g., converging or diverging or parallel channels)
242  DF  .~.~> Vertical charge transfer
243  DF  .~.~> Channel confinement
244  DF  .~.~> Comprising a groove
245  DF  .~.~> Structure for applying electric field into device (e.g., resistive electrode, acoustic traveling wave in channel) {2}
251  DF  .~.~> Substantially incomplete signal charge transfer (e.g., bucket brigade)

DEFINITION

Classification: 257/215

Charge transfer device:

(under subclass 213) Subject matter in which storage sites for packets of electric charge are induced at or below the surface of the active solid-state (semiconductor) device by an electric field applied to the device and wherein carrier potential energy per unit charge minima are established at a given storage site and such minima are transferred to one or more adjacent storage sites in a serial manner.

SEE OR SEARCH THIS CLASS, SUBCLASS:

193, for heterojunction type charge transfer devices.

SEE OR SEARCH CLASS

438, Semiconductor Device Manufacturing: Process,

60, for methods of making a photo-responsive semiconductor integrated circuit having a charge transfer device combined with another electrical device, subclasses 75+ for methods of making a photoresponsive charge transfer device, and subclasses 144+ for methods of making a charge transfer device.