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Class Information
Number: 438/312
Name: Semiconductor device manufacturing: process > Forming bipolar transistor by formation or alteration of semiconductive active regions > Having heterojunction
Description: Process for making a bipolar transistor wherein the emitter-base or the collector-base junction is an interface of two dissimilar semiconductor materials resulting in a heterojunction therebetween.

Sub-classes under this class:

Class Number Class Name Patents
438/314 And additional electrical device 87
438/313 Complementary bipolar transistors 113
438/315 Forming inverted transistor structure 57
438/316 Forming lateral transistor structure 73
438/318 Including isolation structure 129
438/320 Self-aligned 163
438/317 Wide bandgap emitter 94

Patents under this class:
1 2 3 4 5 6 7 8

Patent Number Title Of Patent Date Issued
8703570 Methods of fabricating substrates Apr. 22, 2014
8704335 Spacer formation in the fabrication of planar bipolar transistors Apr. 22, 2014
8673726 Transistor structure with a sidewall-defined intrinsic base to extrinsic base link-up region and method of forming the transistor Mar. 18, 2014
8664698 Bipolar transistor and method with recessed base electrode Mar. 4, 2014
8664697 Transistor device Mar. 4, 2014
8648391 SiGe heterojunction bipolar transistor with an improved breakdown voltage-cutoff frequency product Feb. 11, 2014
8609501 Fluorine implant under isolation dielectric structures to improve bipolar transistor performance and matching Dec. 17, 2013
8603884 Methods of fabricating substrates Dec. 10, 2013
8592865 Overvoltage tolerant HFETs Nov. 26, 2013
8586441 Germanium lateral bipolar junction transistor Nov. 19, 2013
8574994 HBT with emitter electrode having planar side walls Nov. 5, 2013
8557670 SOI lateral bipolar junction transistor having a wide band gap emitter contact Oct. 15, 2013
8546206 Enhancement mode III-nitride FET Oct. 1, 2013
8530934 Integrated circuit structures containing a strain-compensated compound semiconductor layer and methods and systems related thereto Sep. 10, 2013
8519443 Method for making a heterojunction bipolar transistor Aug. 27, 2013
8513706 Heterojunction bipolar transistors with reduced base resistance Aug. 20, 2013
8502269 Semiconductor device Aug. 6, 2013
8435852 HBT with configurable emitter May. 7, 2013
8420493 SOI SiGe-base lateral bipolar junction transistor Apr. 16, 2013
8415762 Semiconductor device for performing photoelectric conversion Apr. 9, 2013
8405127 Method and apparatus for fabricating a heterojunction bipolar transistor Mar. 26, 2013
8395188 Silicon-germanium heterojunction bipolar transistor Mar. 12, 2013
8389372 Heterojunction bipolar transistors with reduced base resistance Mar. 5, 2013
8390027 Gallium nitride semiconductor device and manufacturing method thereof Mar. 5, 2013
8377788 SiGe heterojunction bipolar transistor and method of forming a SiGe heterojunction bipolar transistor Feb. 19, 2013
8354324 Mesa heterojunction phototransistor and method for making same Jan. 15, 2013
8343841 Method for fabricating a semiconductor device Jan. 1, 2013
8304302 Photovoltaic device using single wall carbon nanotubes and method of fabricating the same Nov. 6, 2012
8273634 Methods of fabricating substrates Sep. 25, 2012
8247302 Methods of fabricating substrates Aug. 21, 2012
8227319 Bipolar junction transistor having a high germanium concentration in a silicon-germanium layer and a method for forming the bipolar junction transistor Jul. 24, 2012
8216910 Group III-V compound semiconductor based heterojunction bipolar transistors with various collector profiles on a common wafer Jul. 10, 2012
8169001 Method for preparing a non-self-aligned heterojunction bipolar transistor with a small emitter-to-base spacing May. 1, 2012
8133791 Method of manufacturing a bipolar transistor and bipolar transistor obtained therewith Mar. 13, 2012
8124489 Monolithic microwave integrated circuit device and method of forming the same Feb. 28, 2012
8110472 High power and high temperature semiconductor power devices protected by non-uniform ballasted sources Feb. 7, 2012
8101491 Heterojunction bipolar transistor Jan. 24, 2012
8058124 Method of manufacturing a semiconductor device Nov. 15, 2011
8048734 Bipolar transistor and method for making same Nov. 1, 2011
8043910 Integrated semiconductor structure including a heterojunction bipolar transistor and a Schottky diode Oct. 25, 2011
8039352 Polarization-induced barriers for N-face nitride-based electronics Oct. 18, 2011
8026146 Method of manufacturing a bipolar transistor Sep. 27, 2011
8021951 Formation of longitudinal bipolar transistor with base region in trenches having emitter and collector regions disposed along portions of side surfaces of base region Sep. 20, 2011
7998807 Method for increasing the speed of a light emitting biopolar transistor device Aug. 16, 2011
7972936 Method of fabrication of heterogeneous integrated circuits and devices thereof Jul. 5, 2011
7935606 Transistor manufacture May. 3, 2011
7932145 Method of forming a bipolar transistor and semiconductor component thereof Apr. 26, 2011
7927958 System and method for providing a self aligned bipolar transistor using a silicon nitride ring Apr. 19, 2011
7923752 Thin-film crystal wafer having pn junction and method for fabricating the wafer Apr. 12, 2011
7915640 Heterojunction semiconductor device and method of manufacturing Mar. 29, 2011

1 2 3 4 5 6 7 8

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