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Class Information
Number: 257/E21.364
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 one or two electrodes, e.g., diode, resistor or capacitor with pn or schottky junctions (epo) > Capacitor with pn - or schottky junction, e.g., varactor (epo)
Description: This subclass is indented under subclass E21.351. This subclass is substantially the same in scope as ECLA classification H01L21/329D.










Patents under this class:
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Patent Number Title Of Patent Date Issued
8669623 Structure related to a thick bottom dielectric (TBD) for trench-gate devices Mar. 11, 2014
8524523 Square pillar-shaped switching element for memory device and method of manufacturing the same Sep. 3, 2013
8492823 High performance tapered varactor Jul. 23, 2013
8450827 MOS varactor structure and methods May. 28, 2013
8450832 Large tuning range junction varactor May. 28, 2013
8362591 Integrated circuits and methods of forming the same Jan. 29, 2013
8324064 Methods for forming varactor diodes Dec. 4, 2012
8264047 Semiconductor component with a trench edge termination Sep. 11, 2012
8242581 Mixed-gate metal-oxide-semiconductor varactors Aug. 14, 2012
8163612 Silicon germanium heterostructure barrier varactor Apr. 24, 2012
8148193 Semiconductor device and method of fabricating the same Apr. 3, 2012
8115281 Differential varactor Feb. 14, 2012
8063426 Fast switching power insulated gate semiconductor device Nov. 22, 2011
8053866 Varactor structures Nov. 8, 2011
7989302 Methods of forming a hyper-abrupt P-N junction and design structures for an integrated circuit Aug. 2, 2011
7989868 MOS varactor and fabricating method of the same Aug. 2, 2011
7985615 Method of forming a carbon nanotube/nanowire thermo-photovoltaic cell Jul. 26, 2011
7919382 Methods for forming varactor diodes Apr. 5, 2011
7915658 Semiconductor on insulator (SOI) device including a discharge path for a decoupling capacitor Mar. 29, 2011
7821103 Counter-doped varactor structure and method Oct. 26, 2010
7804119 Device structures with a hyper-abrupt P-N junction, methods of forming a hyper-abrupt P-N junction, and design structures for an integrated circuit Sep. 28, 2010
7781284 Semiconductor device and method of manufacturing the same Aug. 24, 2010
7718503 SOI device and method for its fabrication May. 18, 2010
7714412 MOS varactor using isolation well May. 11, 2010
7704845 Varactor and method for manufacturing the same Apr. 27, 2010
7700453 Method for forming hyper-abrupt junction varactors Apr. 20, 2010
7682919 Semiconductor process and PMOS varactor Mar. 23, 2010
7629668 Composite semiconductor device Dec. 8, 2009
7541252 Methods of fabricating a semiconductor device including a self-aligned cell diode Jun. 2, 2009
7510944 Method of forming a MIM capacitor Mar. 31, 2009
7449389 Method for fabricating a semiconductor structure Nov. 11, 2008
7402890 Method for symmetric capacitor formation Jul. 22, 2008
7378327 Method for fabricating a junction varactor with high Q factor May. 27, 2008
7364967 Methods of forming storage capacitors for semiconductor devices Apr. 29, 2008
7285460 Semiconductor device and method of manufacturing the same Oct. 23, 2007
6995068 Double-implant high performance varactor and method for manufacturing same Feb. 7, 2006
6949440 Method of forming a varactor Sep. 27, 2005
6867107 Variable capacitance device and process for manufacturing the same Mar. 15, 2005
6686640 Varactor having improved Q-factor and method of fabricating the same using SiGe heterojunction bipolar transistor Feb. 3, 2004
6387769 Method of producing a schottky varicap May. 14, 2002
5854117 Method of manufacturing a varicap diode, a varicap diode, a receiver device, and a TV receiver set Dec. 29, 1998
5739570 Integrated circuit Apr. 14, 1998
5627402 Variable-capacitance device and semiconductor integrated circuit device having such variable-capacitance device May. 6, 1997
5514620 Method of producing PN junction device May. 7, 1996
5506442 Variable-capacitance device and semiconductor integrated circuit device having such variable-capacitance device Apr. 9, 1996
5466303 Semiconductor device and manufacturing method therefor Nov. 14, 1995
5236863 Isolation process for VLSI Aug. 17, 1993
5182223 Method of making an integrated circuit with capacitor Jan. 26, 1993
4999309 Aluminum-implant leakage reduction Mar. 12, 1991
4868134 Method of making a variable-capacitance diode device Sep. 19, 1989

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