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Class Information
Number: 257/E21.37
Name: Active solid-state devices (e.g., transistors, solid-state diodes) > Processes or apparatus adapted for manufacture or treatment of semiconductor or solid-state devices or of parts thereof (epo) > Manufacture or treatment of semiconductor device (epo) > Device having at least one potential-jump barrier or surface barrier, e.g., pn junction, depletion layer, carrier concentration layer (epo) > Device having semiconductor body comprising group iv elements or group iii-v compounds with or without impurities, e.g., doping materials (epo) > Multi-step process for manufacture of device of bipolar type, e.g., diodes, transistors, thyristors, resistors, capacitors) (epo) > Device comprising three or more electrodes (epo) > Transistor (epo)
Description: This subclass is indented under subclass E21.369. This subclass is substantially the same in scope as ECLA classification H01L21/331.










Sub-classes under this class:

Class Number Class Name Patents
257/E21.386 Active layer, e.g., base, is group iii-v compound (epo) 9
257/E21.372 Bipolar thin film transistor (epo) 152
257/E21.382 Field-effect controlled bipolar-type transi stor, e.g., insulated gate bipolar transistor (igbt) (epo) 97
257/E21.371 Heterojunction transistor (epo) 398
257/E21.373 Lateral transistor (epo) 86
257/E21.374 Schottky transistor (epo) 8
257/E21.375 Silicon vertical transistor (epo) 638


Patents under this class:
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Patent Number Title Of Patent Date Issued
8669148 Method for manufacturing semiconductor device Mar. 11, 2014
8664691 Silicon photomultiplier with trench isolation Mar. 4, 2014
8648386 Semiconductor structure and manufacturing method for the same and ESD circuit Feb. 11, 2014
8648419 ESD protection device and method Feb. 11, 2014
8624224 Nanotube array bipolar transistors Jan. 7, 2014
8598669 Semiconductor device, and its manufacturing method Dec. 3, 2013
8587041 Solid-state imaging device and method of manufacturing the same Nov. 19, 2013
8563387 Transistor and method of manufacturing a transistor Oct. 22, 2013
8546855 Charging protection device Oct. 1, 2013
8530289 Method for manufacturing semiconductor device Sep. 10, 2013
8530953 Power MOS transistor device and switch apparatus comprising the same Sep. 10, 2013
8525289 Adjusting threshold voltage for sophisticated transistors by diffusing a gate dielectric cap layer material prior to gate dielectric stabilization Sep. 3, 2013
8513717 Semiconductor device and method for manufacturing the same Aug. 20, 2013
8492862 Sputtering target and manufacturing method thereof, and transistor Jul. 23, 2013
8481373 Method for manufacturing thin film transistor substrate Jul. 9, 2013
8476121 Organic thin film transistors and methods of making them Jul. 2, 2013
8461010 Semiconductor device and method for manufacturing same Jun. 11, 2013
8455314 Transistors comprising high-K metal gate electrode structures and embedded strain-inducing semiconductor alloys formed in a late stage Jun. 4, 2013
8455981 Doped graphene electronic materials Jun. 4, 2013
8431966 Method of manufacturing a bipolar transistor semiconductor device and semiconductor devices obtained thereby Apr. 30, 2013
8426258 Vertical semiconductor device with thinned substrate Apr. 23, 2013
8426888 Vertical semiconductor device with thinned substrate Apr. 23, 2013
8410002 Semiconductor device and manufacturing method thereof Apr. 2, 2013
8405186 Transistor structure with a sidewall-defined intrinsic base to extrinsic base link-up region and method of forming the structure Mar. 26, 2013
8389417 Semiconductor device and manufacturing method thereof Mar. 5, 2013
8377760 Thin film transistor Feb. 19, 2013
8354323 Doped graphene electronic materials Jan. 15, 2013
8324119 Enhancing deposition uniformity of a channel semiconductor alloy by an in situ etch process Dec. 4, 2012
8319282 High-voltage bipolar transistor with trench field plate Nov. 27, 2012
8288217 Stressor in planar field effect transistor device Oct. 16, 2012
8198192 Adjusting threshold voltage for sophisticated transistors by diffusing a gate dielectric cap layer material prior to gate dielectric stabilization Jun. 12, 2012
8183120 Method of making bipolar FinFET technology May. 22, 2012
8148213 Method of producing a biosensor Apr. 3, 2012
8134212 Implanted well breakdown in high voltage devices Mar. 13, 2012
8119465 Thin film transistor and method for fabricating the same Feb. 21, 2012
8084312 Nitrogen based implants for defect reduction in strained silicon Dec. 27, 2011
8084307 Method for manufacturing thin film transistor Dec. 27, 2011
8048753 Charging protection device Nov. 1, 2011
8026575 Semiconductor device, electronic device, and manufacturing method of the same Sep. 27, 2011
8022450 Image sensor and method for manufacturing the same Sep. 20, 2011
8003477 Method for making a P-I-N diode crystallized adjacent to a silicide in series with a dielectric antifuse Aug. 23, 2011
7998844 Method for manufacturing a semiconductor device Aug. 16, 2011
7981734 Manufacturing method of thin film transistor including low resistance conductive thin films Jul. 19, 2011
7955911 TFT-LCD pixel unit and method for manufacturing the same Jun. 7, 2011
7948017 Digital radiography imager with buried interconnect layer in silicon-on-glass and method of fabricating same May. 24, 2011
7943441 Method of forming thin film transistor array substrate May. 17, 2011
7935577 Method for forming shielded gate field effect transistor using spacers May. 3, 2011
7919830 Method and structure for ballast resistor Apr. 5, 2011
7915709 Semiconductor device and method of manufacturing the same Mar. 29, 2011
7910419 SOI transistor with self-aligned ground plane and gate and buried oxide of variable thickness Mar. 22, 2011

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