US PATENT SUBCLASS 257 / 431
.~.~ Light


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

414  DF  RESPONSIVE TO NON-ELECTRICAL SIGNAL (E.G., CHEMICAL, STRESS, LIGHT, OR MAGNETIC FIELD SENSORS) {4}
428  DF  .~ Electromagnetic or particle radiation {2}
431.~.~ Light {15}
432  DF  .~.~.~> With optical element
433  DF  .~.~.~> With housing or encapsulation {1}
435  DF  .~.~.~> With optical shield or mask means
436  DF  .~.~.~> With means for increasing light absorption (e.g., redirection of unabsorbed light) {1}
438  DF  .~.~.~> Avalanche junction
439  DF  .~.~.~> Containing dopant adapted for photoionization
440  DF  .~.~.~> With different sensor portions responsive to different wavelengths (e.g., color imager)
441  DF  .~.~.~> Narrow band gap semiconductor (<<1 eV) (e.g., PbSnTe) {1}
443  DF  .~.~.~> Matrix or array (e.g., single line arrays) {5}
449  DF  .~.~.~> Schottky barrier (e.g., a transparent Schottky metallic layer or a Schottky barrier containing at least one of indium or tin (e.g., SnO2, indium tin oxide)) {5}
458  DF  .~.~.~> PIN detector, including combinations with non-light responsive active devices
459  DF  .~.~.~> With particular contact geometry (e.g., ring or grid, or bonding pad arrangement)
460  DF  .~.~.~> With backside illumination (e.g., with a thinned central area or non-absorbing substrate)
461  DF  .~.~.~> Light responsive pn junction {4}
466  DF  .~.~.~> External physical configuration of semiconductor (e.g., mesas, grooves)


DEFINITION

Classification: 257/431

Light:

(under subclass 428) Subject matter wherein the non-electrical signal to which the device responds is electromagnetic energy in the light frequency/wavelength range (i.e., from infrared (except where the response is mainly due to thermal heating due to the infrared radiation) to visible and ultraviolet).

SEE OR SEARCH THIS CLASS, SUBCLASS:

21, for light responsive superlattice quantum well heterojunction tunneling devices.

53, through 56, for amorphous semiconductor junction material devices which are responsive to non-electrical (e.g., light) signals.

80, through 85, for light emitters combined with or also constituting a light responsive device.

113, through 118, for light activated regenerative type

devices.

184, through 189, for light responsive heterojunction devices in non-charge transfer devices. 225, through 234, for charge transfer devices with non-electrical (e.g., light) input.

257, through 258, for light responsive JFET devices.

290, through 294, for light responsive insulated electrode field effect devices.

SEE OR SEARCH CLASS

438, Semiconductor Device Manufacturing: Process, particularly

54+, for methods of making a temperature responsive semiconductor device.