US PATENT SUBCLASS 438 / 144
.~ Charge transfer device (e.g., CCD, etc.)

Current as of: June, 1999
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438 /   HD   SEMICONDUCTOR DEVICE MANUFACTURING: PROCESS

142  DF  MAKING FIELD EFFECT DEVICE HAVING PAIR OF ACTIVE REGIONS SEPARATED BY GATE STRUCTURE BY FORMATION OR ALTERATION OF SEMICONDUCTIVE ACTIVE REGIONS {6}
144.~ Charge transfer device (e.g., CCD, etc.) {4}
145  DF  .~.~> Having additional electrical device
146  DF  .~.~> Majority signal carrier (e.g., buried or bulk channel, peristaltic, etc.)
147  DF  .~.~> Changing width or direction of channel (e.g., meandering channel, etc.)
148  DF  .~.~> Substantially incomplete signal charge transfer (e.g., bucket brigade, etc.)

DEFINITION

Classification: 438/144

Charge transfer device (e.g., CCD, etc.):

(under subclass 142) Process for making a structure in which storage sites for packets of electrical charge are induced at or below the semiconductor surface by an electric field applied by serially arranged gate electrodes formed thereupon and wherein carrier potential energy per unit charge minima are established at a given storage site and such minima are transferred in a serial manner via an active channel region to one or more adjacent storage sites.

(1) Note. Included herein are devices commonly referred to as charge coupled devices as well as bucket brigade devices.

(2) Note. A field effect device of the charge injection-type (i.e., CID) that transfers the charge in a nonserial manner to the device substrate or the data bus is not proper hereunder.

SEE OR SEARCH THIS CLASS, SUBCLASS:

75, for a process of making a charge transfer device which is responsive to electromagnetic radiation.

587, for a process of making an array of gate electrodes upon a semiconductor substrate.

SEE OR SEARCH CLASS 257, Active Solid-State Devices (e.g., Transistors, Solid-State Diodes),

215+, for a charge transfer device structure.

365, Static Information Storage and Retrieval,

183, for a charge coupled memory.

377, Electrical Pulse Counters, Pulse Dividers, or Shift Registers: Circuits and Systems,

57+, for charge transfer device systems.