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Class Information
Number: 257/E31.071
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 at least three potential barriers (epo) > Photothyristor (epo)
Description: This subclass is indented under subclass E31.07. This subclass is substantially the same in scope as ECLA classification H01L31/111B.










Sub-classes under this class:

Class Number Class Name Patents
257/E31.072 Static induction type (i.e., sit device) (epo) 9


Patents under this class:
1 2 3

Patent Number Title Of Patent Date Issued
8680640 Solid-state imaging device Mar. 25, 2014
8174031 Light-emitting element chip, exposure device and image forming apparatus May. 8, 2012
8124987 Light-emitting element chip, exposure device and image forming apparatus Feb. 28, 2012
8076741 Photo sensing element array substrate Dec. 13, 2011
7989841 Fast injection optical switch Aug. 2, 2011
7816755 Photoelectric conversion device with isolation arrangement that reduces pixel space without reducing resolution or sensitivity Oct. 19, 2010
7687875 Image sensors including photoelectric converting units having multiple impurity regions Mar. 30, 2010
7378687 Photothyristor device, bidirectional photothyristor device and electronic apparatus May. 27, 2008
7157747 Bidirectional photothyristor chip, light-fired coupler and solid state relay Jan. 2, 2007
7132677 Super bright light emitting diode of nanorod array structure having InGaN quantum well and method for manufacturing the same Nov. 7, 2006
6770911 Large area silicon carbide devices Aug. 3, 2004
6525374 Semiconductor component with a high breakdown voltage Feb. 25, 2003
6479844 Modulation doped thyristor and complementary transistor combination for a monolithic optoelectronic integrated circuit Nov. 12, 2002
6271545 Asymmetrical thyristor with blocking/sweep voltage independent of temperature behavior Aug. 7, 2001
6218682 Optically controlled thyristor Apr. 17, 2001
6037613 Bidirectional thyristor device Mar. 14, 2000
5804841 Optical trigger thyristor and fabrication method Sep. 8, 1998
5801429 Semiconductor device Sep. 1, 1998
5793063 High voltage, vertical-trench semiconductor device Aug. 11, 1998
5780877 Break-over photodiode Jul. 14, 1998
5742716 Light trigger thyristor Apr. 21, 1998
5733815 Process for fabricating intrinsic layer and applications Mar. 31, 1998
5677552 Optical control circuit for an optical pnpn thyristor Oct. 14, 1997
5663580 Optically triggered semiconductor device Sep. 2, 1997
5652439 Fast electrical complete turn-off optical device Jul. 29, 1997
5646760 Differential pair of optical thyristors used as an optoelectronic transceiver Jul. 8, 1997
5637886 Thyristor with improved dv/dt resistance Jun. 10, 1997
5621237 Semiconductor device Apr. 15, 1997
5506425 Semiconductor device and lead frame combination Apr. 9, 1996
5506152 Method of making silicon controlled rectifier with a variable base-shunt resistance Apr. 9, 1996
5446295 Silicon controlled rectifier with a variable base-shunt resistant Aug. 29, 1995
5445974 Method of fabricating a high-voltage, vertical-trench semiconductor device Aug. 29, 1995
5420046 Method for manufacturing optically triggered lateral thyristor May. 30, 1995
5420045 Process for manufacturing thyristor with adjustable breakover voltage May. 30, 1995
5344794 Method of making a semiconductor chip Sep. 6, 1994
5291041 AlGaAs/GaAs thyristor Mar. 1, 1994
5243205 Semiconductor device with overvoltage protective function Sep. 7, 1993
5169790 Method of making thyristor having low reflection light-triggering structure Dec. 8, 1992
5138415 Photo-semiconductor device with a zero-cross function Aug. 11, 1992
5083177 Thyristor having a low-reflection light-triggering structure Jan. 21, 1992
5049965 Thyristor having adjustable breakover voltage and method of manufacture Sep. 17, 1991
5017991 Light quenchable thyristor device May. 21, 1991
5003369 Thyristor of overvoltage self-protection type Mar. 26, 1991
4982259 Sensitive thyristor having improved noise-capability Jan. 1, 1991
4974047 Light triggered thyristor Nov. 27, 1990
4943835 Semiconductor device including protecting MOS transistor Jul. 24, 1990
4908687 Controlled turn-on thyristor Mar. 13, 1990
4841350 Static induction photothyristor having a non-homogeneously doped gate Jun. 20, 1989
4829357 PNPN thyristor May. 9, 1989
4812892 Light controllable thyristors Mar. 14, 1989

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