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Class Information
Number: 257/E29.03
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) > Emitter regions of bipolar transistors (epo)
Description: This subclass is indented under subclass E29.029. This subclass is substantially the same in scope as ECLA classification H01L29/08B.

Sub-classes under this class:

Class Number Class Name Patents
257/E29.032 Noninterconnected multiemitter structures (epo) 40
257/E29.033 Of heterojunction bipolar transistors (epo) 99
257/E29.031 Of lateral transistors (epo) 25

Patents under this class:
1 2 3 4 5

Patent Number Title Of Patent Date Issued
8685813 Method of integrating a charge-trapping gate stack into a CMOS flow Apr. 1, 2014
8623731 Methods of forming electrostatic discharge devices Jan. 7, 2014
8604590 Transistor with enhanced capacitance at electrodes and transistor with light emitting capacitive element Dec. 10, 2013
8575679 Nonvolatile semiconductor memory device Nov. 5, 2013
8558302 Nonvolatile semiconductor memory device Oct. 15, 2013
8546229 Methods for fabricating bipolar transistors with improved gain Oct. 1, 2013
8536680 ESD protection circuit and semiconductor device Sep. 17, 2013
8481386 Nanocrystal memories and methods of forming the same Jul. 9, 2013
8441058 Memory devices having reduced interference between floating gates and methods of fabricating such devices May. 14, 2013
8384193 Bipolar transistor with two different emitter portions having same type dopant of different concentrations for improved gain Feb. 26, 2013
8350355 Electrostatic discharge devices Jan. 8, 2013
8344441 Nonvolatile semiconductor memory device Jan. 1, 2013
8269313 Bipolar transistor including conductive first and second protection layers Sep. 18, 2012
8216925 Transistor structure having a trench drain Jul. 10, 2012
8101950 Information device Jan. 24, 2012
8044388 Method of forming a carbon nanotube-based contact to semiconductor Oct. 25, 2011
8017988 High density stepped, non-planar flash memory Sep. 13, 2011
7935986 Method for forming a bipolar transistor device with self-aligned raised extrinsic base May. 3, 2011
7872326 Array of vertical bipolar junction transistors, in particular selectors in a phase change memory device Jan. 18, 2011
7847305 Semiconductor light emitting device Dec. 7, 2010
7847350 Transistor structure having a trench drain Dec. 7, 2010
7834390 Nonvolatile semiconductor memory device and method of manufacturing the same Nov. 16, 2010
7781808 Semiconductor apparatus and complimentary MIS logic circuit Aug. 24, 2010
7687402 Methods of making optoelectronic devices, and methods of making solar cells Mar. 30, 2010
7656002 Integrated bipolar transistor and field effect transistor Feb. 2, 2010
7598521 Semiconductor device in which the emitter resistance is reduced Oct. 6, 2009
7560767 Nonvolatile semiconductor memory device Jul. 14, 2009
7453117 Non-volatile semiconductor memory device Nov. 18, 2008
7439607 Beta control using a rapid thermal oxidation Oct. 21, 2008
7208387 Method for manufacturing compound semiconductor wafer and compound semiconductor device Apr. 24, 2007
7180157 Bipolar transistor with a very narrow emitter feature Feb. 20, 2007
7045876 Amorphizing ion implant method for forming polysilicon emitter bipolar transistor May. 16, 2006
7041564 Method for fabricating a self-aligned bipolar transistor May. 9, 2006
7008852 Discontinuous dielectric interface for bipolar transistors Mar. 7, 2006
6989557 Bipolar junction transistor and fabricating method Jan. 24, 2006
6984872 Method for fabricating an NPN transistor in a BICMOS technology Jan. 10, 2006
6979626 Method for fabricating a self-aligned bipolar transistor having increased manufacturability and related structure Dec. 27, 2005
6979884 Bipolar transistor having self-aligned silicide and a self-aligned emitter contact border Dec. 27, 2005
6972472 Quasi self-aligned single polysilicon bipolar active device with intentional emitter window undercut Dec. 6, 2005
6949437 Manufacturing method of semiconductor device including an anisotropic etching step Sep. 27, 2005
6939771 Discontinuous dielectric interface for bipolar transistors Sep. 6, 2005
6936519 Double polysilicon bipolar transistor and method of manufacture therefor Aug. 30, 2005
6917077 Protection diode for improved ruggedness of a radio frequency power transistor and self-defining method to manufacture such protection diode Jul. 12, 2005
6911368 Arrangement for preventing short-circuiting in a bipolar double-poly transistor and a method of fabricating such an arrangement Jun. 28, 2005
6905935 Method for fabricating a vertical bipolar junction transistor Jun. 14, 2005
6900105 Semiconductor device and method of manufacture May. 31, 2005
6897546 Semiconductor device including a functional element having a PN junction May. 24, 2005
6894328 Self-aligned bipolar transistor having recessed spacers and method for fabricating same May. 17, 2005
6891250 Semiconductor device with bipolar transistor May. 10, 2005
6887765 Method for manufacturing a bipolar junction transistor May. 3, 2005

1 2 3 4 5

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