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Class Information
Number: 257/E29.029
Name: Active solid-state devices (e.g., transistors, solid-state diodes) > Semiconductors devices adapted for rectifying, amplifying, oscillating, or switching, capacitors, or resistors with at least one potential-jump barrier or surface barrier (epo) > Electrical characteristics due to properties of entire semiconductor body rather than just surface region (epo) > Characterized by specified shape or size of pn junction or by specified impurity concentration gradient within the device (epo) > With semiconductor regions connected to electrode carrying current to be rectified, amplified or switched and such electrode being part of semiconductor device which comprises three or more electrodes (epo)
Description: This subclass is indented under subclass E29.005. This subclass is substantially the same in scope as ECLA classification H01L29/08.

Sub-classes under this class:

Class Number Class Name Patents
257/E29.036 Anode or cathode regions of thyristors or gated bipolar-mode devices (epo) 18
257/E29.034 Collector regions of bipolar transistors (epo) 261
257/E29.03 Emitter regions of bipolar transistors (epo) 243
257/E29.039 Source or drain regions of field-effect devices (epo) 66
257/E29.042 Tunneling barrier (epo) 73

Patents under this class:

Patent Number Title Of Patent Date Issued
8598596 Method for producing an optoelectronic semiconductor chip and optoelectronic semiconductor chip Dec. 3, 2013
8569843 Semiconductor device Oct. 29, 2013
8390124 Semiconductor device and method of manufacturing semiconductor device including wiring via and switch via for connecting first and second wirings Mar. 5, 2013
8373248 Linear-cap varactor structures for high-linearity applications Feb. 12, 2013
8344463 Bidirectional switch Jan. 1, 2013
8299450 Non-volatile memory device including phase-change material Oct. 30, 2012
7924603 Resistance variable memory with temperature tolerant materials Apr. 12, 2011
7872315 Electronic switching device Jan. 18, 2011
7825467 Semiconductor component having a drift zone and a drift control zone Nov. 2, 2010
7795638 Semiconductor device with a U-shape drift region Sep. 14, 2010
7719001 Semiconductor device with metal oxides and an organic compound May. 18, 2010
7682992 Resistance variable memory with temperature tolerant materials Mar. 23, 2010
7538394 Compound semiconductor switch circuit device May. 26, 2009
7495296 Semiconductor integrated circuit device Feb. 24, 2009
7417302 Semiconductor device and method of manufacturing the same Aug. 26, 2008
7355258 Method and apparatus for bending electrostatic switch Apr. 8, 2008
7332811 Integrated circuit interconnect Feb. 19, 2008
5426326 Semiconductor device including arrangement for reducing junction degradation Jun. 20, 1995
4728844 Piezoelectric transducer and components therefor Mar. 1, 1988
4103245 Transistor amplifier for low level signal Jul. 25, 1978

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