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Class Information
Number: 257/E27.049
Name: Active solid-state devices (e.g., transistors, solid-state diodes) > Device consisting of a plurality of semiconductor or other solid state components formed in or on a common substrate, e.g., integrated circuit device (epo) > Including semiconductor component with at least one potential barrier or surface barrier adapted for rectifying, oscillating, amplifying, or switching, or including integrated passive circuit elements (epo) > With semiconductor substrate only (epo) > Including only semiconductor components of a single kind, e.g., all bipolar transistors, all diodes, or all cmos (epo) > Capacitor only (epo) > Varactor diode (epo)
Description: This subclass is indented under subclass E27.048. This subclass is substantially the same in scope as ECLA classification H01L27/08C2.

Patents under this class:
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Patent Number Title Of Patent Date Issued
8502348 Differential varactor device Aug. 6, 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
8304856 Semiconductor device Nov. 6, 2012
8217489 Nonvolatile memory element having a tantalum oxide variable resistance layer Jul. 10, 2012
8115281 Differential varactor Feb. 14, 2012
8053866 Varactor structures Nov. 8, 2011
8022507 Varactor diodes Sep. 20, 2011
7952131 Lateral junction varactor with large tuning range May. 31, 2011
7944019 Voltage-controlled semiconductor inductor and method May. 17, 2011
7821103 Counter-doped varactor structure and method Oct. 26, 2010
7781821 Parallel varactor capacitor with varying capacitance Aug. 24, 2010
7741187 Lateral junction varactor with large tuning range Jun. 22, 2010
7705428 Varactor Apr. 27, 2010
7704845 Varactor and method for manufacturing the same Apr. 27, 2010
7696604 Silicon germanium heterostructure barrier varactor Apr. 13, 2010
7683390 Semiconductor device Mar. 23, 2010
7682919 Semiconductor process and PMOS varactor Mar. 23, 2010
7579642 Gate-enhanced junction varactor Aug. 25, 2009
7545007 MOS varactor with segmented gate doping Jun. 9, 2009
7511356 Voltage-controlled semiconductor inductor and method Mar. 31, 2009
7378327 Method for fabricating a junction varactor with high Q factor May. 27, 2008
7211493 Variable capacitor structure and method of manufacture May. 1, 2007
7053465 Semiconductor varactor with reduced parasitic resistance May. 30, 2006
7038527 MOS varactor for LC VCOs May. 2, 2006
7019384 Integrated, tunable capacitance device Mar. 28, 2006
7002435 Variable capacitance circuit, variable capacitance thin film capacitor and radio frequency device Feb. 21, 2006
6987309 Semiconductor device applied to a variable capacitance capacitor and amplifier Jan. 17, 2006
6970055 Tunable planar capacitor Nov. 29, 2005
6950299 Non-linear capacitors Sep. 27, 2005
6949440 Method of forming a varactor Sep. 27, 2005
6921936 pn Varactor Jul. 26, 2005
6906904 Integrated, tunable capacitance Jun. 14, 2005
6891251 Varactors for CMOS and BiCMOS technologies May. 10, 2005
6885081 Semiconductor capacitor device having reduced voltage dependence Apr. 26, 2005
6882029 Junction varactor with high Q factor and wide tuning range Apr. 19, 2005
6878983 High performance varactor diodes Apr. 12, 2005
6867629 Integrated circuit and method of adjusting capacitance of a node of an integrated circuit Mar. 15, 2005
6865067 Structure of radio frequency variable capacitor and method of manufacturing the same Mar. 8, 2005
6858918 Semiconductor device including a capacitance Feb. 22, 2005
6855995 Physically defined varactor in a CMOS process Feb. 15, 2005
6849488 Physically defined varactor in a CMOS process Feb. 1, 2005
6835977 Variable capactor structure Dec. 28, 2004
6803269 High performance varactor diodes Oct. 12, 2004
6800532 Method of manufacturing a semiconductor device comprising a bipolar transistor and a variable capacitor Oct. 5, 2004
6764891 Physically defined varactor in a CMOS process Jul. 20, 2004
6737929 Hybrid n+ and p+ gate-doped voltage variable capacitors to improve linear tuning range in voltage controlled oscillators May. 18, 2004
6737930 Tunable planar capacitor May. 18, 2004
6707108 Transient voltage suppressor structure Mar. 16, 2004

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