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Class Information
Number: 257/E31.052
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)
Description: This subclass is indented under subclass E31.001. This subclass is substantially the same in scope as ECLA classification H01L31/08.

Sub-classes under this class:

Class Number Class Name Patents
257/E31.092 Device being sensitive to very short wavelength (e.g., x-ray, gamma-ray) (epo) 42
257/E31.093 Device sensitive to infrared, visible, or ultraviolet radiation (epo) 235
257/E31.053 For device having potential or surface barrier (e.g., phototransistor) (epo) 77

Patents under this class:
1 2

Patent Number Title Of Patent Date Issued
8664739 Image sensor comprising isolated germanium photodetectors integrated with a silicon substrate and silicon circuitry Mar. 4, 2014
8603839 In-line metrology system Dec. 10, 2013
8390089 Image sensor with deep trench isolation structure Mar. 5, 2013
8368122 Multiple-junction photoelectric device Feb. 5, 2013
8338212 Method of forming mask for lithography, method of forming mask data for lithography, method of manufacturing back-illuminated solid-state imaging device, back-illuminated solid-state imaging d Dec. 25, 2012
8299484 Optoelectronic semiconductor chip Oct. 30, 2012
8293559 Method of manufacturing photoelectric conversion device Oct. 23, 2012
8154099 Composite semiconductor structure formed using atomic bonding and adapted to alter the rate of thermal expansion of a substrate Apr. 10, 2012
7993951 Method of manufacturing photoelectric conversion device Aug. 9, 2011
7968365 Method for manufacturing solid-state imaging device Jun. 28, 2011
7943976 CMOS image sensor and manufacturing method thereof May. 17, 2011
7855089 Application specific solar cell and method for manufacture using thin film photovoltaic materials Dec. 21, 2010
7816755 Photoelectric conversion device with isolation arrangement that reduces pixel space without reducing resolution or sensitivity Oct. 19, 2010
7759758 Integrated circuit having resistance temperature sensor Jul. 20, 2010
7667272 Semiconductor device including a current mirror circuit Feb. 23, 2010
7582945 Photo thin film transistor having photoconductive layer including chalcogenide element and unit cell of image sensor using the same Sep. 1, 2009
7317234 Means of integrating a microphone in a standard integrated circuit process Jan. 8, 2008
7180150 CMOS image sensor and method for detecting color sensitivity thereof Feb. 20, 2007
7095060 Unit for driving light-emitting device Aug. 22, 2006
6955932 Single and double-gate pseudo-FET devices for semiconductor materials evaluation Oct. 18, 2005
6263124 Photoconductive switch Jul. 17, 2001
6252221 Photo-conductive switch having an improved semiconductor structure Jun. 26, 2001
6222141 Irradiation controlled switch Apr. 24, 2001
6194699 Photoconductive switch with multiple layers Feb. 27, 2001
H1835 Bistable photoconductive switches particularly suited for frequency-agile, radio-frequency sources Feb. 1, 2000
5912455 Photoconductor-based electrical switch Jun. 15, 1999
5905272 Optical receiver May. 18, 1999
5864166 Bistable photoconductive switches particularly suited for frequency-agile, radio-frequency sources Jan. 26, 1999
5844288 Photoconductive element and method for measuring high frequency signals Dec. 1, 1998
5811841 Photoconductive switching with thin layer enhanced breakdown charateristics Sep. 22, 1998
5808349 Magnetized photoconductive semiconductor switch Sep. 15, 1998
5804815 GaAs photoconductive semiconductor switch Sep. 8, 1998
5773817 Ultrafast, high voltage pulser using circumferentially illuminated, laser-switched radial transmission line Jun. 30, 1998
H1717 Bistable photoconductive switches particularly suited for frequency-agile, radio-frequency sources Apr. 7, 1998
5637862 Detector for determining the wavelength of an optical signal Jun. 10, 1997
5629665 Conducting-polymer bolometer May. 13, 1997
5596209 Photoconductive semiconductor control device Jan. 21, 1997
5508625 Voltage stand off characteristics of photoconductor devices Apr. 16, 1996
5428226 Relativistic semiconductor plasma wave frequency up-converter with energized portion Jun. 27, 1995
5403673 Functional thin film member Apr. 4, 1995
5382788 Monolithic photoconductive bipolar pulsar utilizing a radial transmission line Jan. 17, 1995
5374589 Process of making a bistable photoconductive component Dec. 20, 1994
5332911 Semiconductor component with adiabatic transport in edge channels Jul. 26, 1994
5323024 Relativistic semiconductor plasma wave frequency up-converter Jun. 21, 1994
5309132 Technique for trimming photoresistors and trimmed photoresistors May. 3, 1994
5293037 Opto-electronic converter with electron mirrors and quantum wire Mar. 8, 1994
5285068 Photo-detector and photo-detection method using the same Feb. 8, 1994
5262657 Optically activated wafer-scale pulser with AlGaAs epitaxial layer Nov. 16, 1993
5170238 Switching element with organic insulative region Dec. 8, 1992
5140398 Switching device Aug. 18, 1992

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