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Class Information
Number: 257/E31.068
Name: Active solid-state devices (e.g., transistors, solid-state diodes) > Semiconductor devices responsive or sensitive to electromagnetic radiation (e.g., infrared radiation, adapted for conversion of radiation into electrical energy or for control of electrical energy by such radiation processes, or apparatus peculiar to manufacture or treatment of such devices, or of parts thereof) (epo) > Adapted to control current flow through device (e.g., photoresistor) (epo) > For device having potential or surface barrier (e.g., phototransistor) (epo) > Device sensitive to infrared, visible, or ultraviolet radiation (epo) > Characterized by two potential or surface barriers (epo)
Description: This subclass is indented under subclass E31.054. This subclass is substantially the same in scope as ECLA classification H01L31/11.

Sub-classes under this class:

Class Number Class Name Patents
257/E31.069 Bipolar phototransistor (epo) 121

Patents under this class:

Patent Number Title Of Patent Date Issued
8507311 Method for forming an image sensing device Aug. 13, 2013
8247853 Stratified photodiode for high resolution CMOS image sensor implemented with STI technology Aug. 21, 2012
8035186 Low-noise semiconductor photodetectors Oct. 11, 2011
6798001 Semiconductor device having photo diode with sensitivity to light of different wavelengths Sep. 28, 2004
6246099 Photosensitive semiconductor element having an outer layer divided into mutually spaced regions Jun. 12, 2001
6184538 Dual-band quantum-well infrared sensing array having commonly biased contact layers Feb. 6, 2001
6049116 Two-color infrared detector and fabrication method thereof Apr. 11, 2000
5977557 Hot-electron photo transistor Nov. 2, 1999
5949561 Wavelength demultiplexing multiple quantum well photodetector Sep. 7, 1999
5923049 Trichromatic sensor Jul. 13, 1999
5920065 Optically activated back-to-back PIN diode switch having exposed intrinsic region Jul. 6, 1999
5818051 Multiple color infrared detector Oct. 6, 1998
5382824 Integrated circuit with an integrated color-selective photo diode and an amplifier following the photo-diode Jan. 17, 1995
5367166 Infrared detector devices and their manufacture Nov. 22, 1994
5324929 Device for detecting position and intensity of light and position detecting element to be employed therein Jun. 28, 1994
5266814 Optically activated resonant-tunneling transistor Nov. 30, 1993
5216538 Electric-signal amplifying device using light transmission Jun. 1, 1993
5130776 Ultraviolet-light photodiode Jul. 14, 1992
5113076 Two terminal multi-band infrared radiation detector May. 12, 1992
5097307 Radiation sensitive semiconductor device for optical reading or writing unit Mar. 17, 1992
5036203 Superimposed detector arrays having optical filters Jul. 30, 1991
4820915 Color sensor with amorphous pin structure Apr. 11, 1989
4804833 Color sensing method and device therefor Feb. 14, 1989
4729004 Semiconductor photo device Mar. 1, 1988
4698658 Amorphous semiconductor device Oct. 6, 1987
4682196 Multi-layered semi-conductor photodetector Jul. 21, 1987
4626675 Demultiplexing photodiode sensitive to plural wavelength bands Dec. 2, 1986
4471370 Majority carrier photodetector Sep. 11, 1984
4390889 Photodiode having an InGaAs layer with an adjacent InGaAsP p-n junction Jun. 28, 1983
4368385 Optoelectronic switches Jan. 11, 1983
4366377 Dual sensitivity optical sensor Dec. 28, 1982
4328508 III-V Quaternary alloy photodiode May. 4, 1982
4323911 Demultiplexing photodetectors Apr. 6, 1982
4318115 Dual junction photoelectric semiconductor device Mar. 2, 1982
4316206 Two color narrow bandwidth detector Feb. 16, 1982
4309604 Apparatus for sensing the wavelength and intensity of light Jan. 5, 1982
4301463 Demultiplexing photodetector Nov. 17, 1981
4297720 Multi-photodiodes Oct. 27, 1981
4242695 Low dark current photo-semiconductor device Dec. 30, 1980
4238760 Multi-spectrum photodiode devices Dec. 9, 1980
4213138 Demultiplexing photodetector Jul. 15, 1980
4183035 Inverted heterojunction photodiode Jan. 8, 1980
4107722 Photodiode structure having an enhanced blue color response Aug. 15, 1978
4068253 Photoconductor element and method of making the element Jan. 10, 1978
4021833 Infrared photodiode May. 3, 1977
4011016 Semiconductor radiation wavelength detector Mar. 8, 1977
3995308 Photosensitive Darlington device and process of fabricating same Nov. 30, 1976
3982261 Epitaxial indium-gallium-arsenide phosphide layer on lattice-matched indium-phosphide substrate and devices Sep. 21, 1976

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