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Class Information
Number: 438/350
Name: Semiconductor device manufacturing: process > Forming bipolar transistor by formation or alteration of semiconductive active regions > Forming base region of specified dopant concentration profile (e.g., inactive base region more heavily doped than active base region, etc.)
Description: Process for making a bipolar transistor with a semiconductor base region possessing a specified concentration profile of an electrically active dopant species contained therein.










Patents under this class:
1 2 3 4

Patent Number Title Of Patent Date Issued
8581327 Memory and manufacturing method thereof Nov. 12, 2013
8486797 Bipolar junction transistor with epitaxial contacts Jul. 16, 2013
8343841 Method for fabricating a semiconductor device Jan. 1, 2013
8319282 High-voltage bipolar transistor with trench field plate Nov. 27, 2012
8263469 Methods of forming a bipolar transistor Sep. 11, 2012
8216910 Group III-V compound semiconductor based heterojunction bipolar transistors with various collector profiles on a common wafer Jul. 10, 2012
8211785 Fabrication method for semiconductor device including flash lamp annealing processes Jul. 3, 2012
8168504 Integrated circuit comprising a gradually doped bipolar transistor and corresponding fabrication process May. 1, 2012
8168505 Method of fabricating transistor with epitaxial layers having different germanium concentrations May. 1, 2012
8058704 Bipolar transistor Nov. 15, 2011
8022506 SOI device with more immunity from substrate voltage Sep. 20, 2011
7943969 Transistor with a plurality of layers with different Ge concentrations May. 17, 2011
7939414 Ion implantation and process sequence to form smaller base pick-up May. 10, 2011
7880272 Semiconductor device with near-surface compensation doping area and method of fabricating Feb. 1, 2011
7879706 Memory and manufacturing method thereof Feb. 1, 2011
7851890 Semiconductor device and method for manufacturing the same Dec. 14, 2010
7816706 Power semiconductor device Oct. 19, 2010
7811894 Bipolar junction transistor and manufacturing method thereof Oct. 12, 2010
7807539 Ion implantation and process sequence to form smaller base pick-up Oct. 5, 2010
7772079 Vertical organic transistor Aug. 10, 2010
7732256 Fabrication method of non-volatile memory Jun. 8, 2010
7692269 Vertical organic transistor Apr. 6, 2010
7651919 Bandgap and recombination engineered emitter layers for SiGe HBT performance optimization Jan. 26, 2010
7629211 Field effect transistor and method of forming a field effect transistor Dec. 8, 2009
7615457 Method of fabricating self-aligned bipolar transistor having tapered collector Nov. 10, 2009
7538412 Semiconductor device with a field stop zone May. 26, 2009
7495313 Germanium substrate-type materials and approach therefor Feb. 24, 2009
7495264 Semiconductor device with high dielectric constant insulating film and manufacturing method for the same Feb. 24, 2009
7485538 High performance SiGe HBT with arsenic atomic layer doping Feb. 3, 2009
7482673 Structure and method for bipolar transistor having non-uniform collector-base junction Jan. 27, 2009
7465969 Bipolar transistor and method for fabricating the same Dec. 16, 2008
7442616 Method of manufacturing a bipolar transistor and bipolar transistor thereof Oct. 28, 2008
7378325 Semiconductor device and manufacturing method thereof May. 27, 2008
7378324 Selective links in silicon hetero-junction bipolar transistors using carbon doping and method of forming same May. 27, 2008
7368361 Bipolar junction transistors and method of manufacturing the same May. 6, 2008
7364976 Selective etch for patterning a semiconductor film deposited non-selectively Apr. 29, 2008
7335547 Method for effective BiCMOS process integration Feb. 26, 2008
7271070 Method for producing transistors Sep. 18, 2007
7262483 Semiconductor device and method for manufacturing the same Aug. 28, 2007
7229861 Method for producing semiconductor device Jun. 12, 2007
7169660 Lithography-independent fabrication of small openings for forming vertical mos transistor Jan. 30, 2007
7141865 Low noise semiconductor amplifier Nov. 28, 2006
7091099 Bipolar transistor and method for fabricating the same Aug. 15, 2006
7064042 Self aligned compact bipolar junction transistor layout, and method of making same Jun. 20, 2006
7053464 System and method for providing a variable breakdown bipolar transistor May. 30, 2006
7037799 Breakdown voltage adjustment for bipolar transistors May. 2, 2006
7037798 Bipolar transistor structure with self-aligned raised extrinsic base and methods May. 2, 2006
7019383 Gallium arsenide HBT having increased performance and method for its fabrication Mar. 28, 2006
6967144 Low doped base spacer for reduction of emitter-base capacitance in bipolar transistors with selectively grown epitaxial base Nov. 22, 2005
6939772 Bipolar transistor and fabrication method thereof Sep. 6, 2005

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