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Class Information
Number: 257/E21.428
Name: Active solid-state devices (e.g., transistors, solid-state diodes) > Processes or apparatus adapted for manufacture or treatment of semiconductor or solid-state devices or of parts thereof (epo) > Manufacture or treatment of semiconductor device (epo) > Device having at least one potential-jump barrier or surface barrier, e.g., pn junction, depletion layer, carrier concentration layer (epo) > Device having semiconductor body comprising group iv elements or group iii-v compounds with or without impurities, e.g., doping materials (epo) > Multi-step process for the manufacture of unipolar device (epo) > Field-effect transistor (epo) > With an insulated gate (epo) > Lateral single gate silicon transistor (epo) > With a recessed gate, e.g., lateral u-mos (epo)
Description: This subclass is indented under subclass E21.424. This subclass is substantially the same in scope as ECLA classification H01L21/336H6.










Sub-classes under this class:

Class Number Class Name Patents
257/E21.43 Recessing gate by adding semiconductor material at source (s) or drain (d) location, e.g., transist or with elevated single crystal s and d (epo) 362
257/E21.429 Using etching to form recess at gate location (epo) 304


Patents under this class:
1 2 3 4

Patent Number Title Of Patent Date Issued
8642424 Replacement metal gate structure and methods of manufacture Feb. 4, 2014
8643090 Semiconductor devices and methods for manufacturing a semiconductor device Feb. 4, 2014
8536644 Semiconductor device having a buried gate and method for forming the same Sep. 17, 2013
8476701 Semiconductor device with gate electrode including a concave portion Jul. 2, 2013
8466052 Method of fabricating semiconductor device having buried wiring Jun. 18, 2013
RE44236 Method for manufacturing semiconductor device May. 21, 2013
8426273 Methods of forming field effect transistors on substrates Apr. 23, 2013
8383501 Vertical field effect transistor arrays and methods for fabrication thereof Feb. 26, 2013
8373226 Semiconductor device including a Trench-Gate Fin-FET Feb. 12, 2013
8357600 Method for fabricating buried gate using pre landing plugs Jan. 22, 2013
8217423 Structure and method for mobility enhanced MOSFETs with unalloyed silicide Jul. 10, 2012
8202795 Method of fabricating a semiconductor device having a plug Jun. 19, 2012
8159027 Semiconductor device Apr. 17, 2012
8143125 Structure and method for forming a salicide on the gate electrode of a trench-gate FET Mar. 27, 2012
8133786 Transistors with laterally extended active regions and methods of fabricating same Mar. 13, 2012
8101482 Method of fabricating semiconductor device having transistor Jan. 24, 2012
8097538 Method of manufacturing semiconductor device Jan. 17, 2012
8084327 Method for forming trench gate field effect transistor with recessed mesas using spacers Dec. 27, 2011
8076202 Method of fabricating semiconductor device Dec. 13, 2011
8058687 Split gate with different gate materials and work functions to reduce gate resistance of ultra high density MOSFET Nov. 15, 2011
8030703 Field-effect transistor and method for manufacturing a field-effect transistor Oct. 4, 2011
8012828 Recess gate transistor Sep. 6, 2011
7977189 Semiconductor device and method of manufacturing the same Jul. 12, 2011
7964488 Semiconductor device and method for fabricating the same Jun. 21, 2011
7951661 Semiconductor device and method of fabricating the same May. 31, 2011
7947559 Method of fabricating semiconductor device May. 24, 2011
7943463 Methods of semiconductor processing involving forming doped polysilicon on undoped polysilicon May. 17, 2011
7902597 Transistors with laterally extended active regions and methods of fabricating same Mar. 8, 2011
7897466 Method for manufacturing semiconductor device Mar. 1, 2011
7883969 Metal oxide semiconductor field effect transistors (MOSFETs) including recessed channel regions and methods of fabricating the same Feb. 8, 2011
7867854 Method of fabricating power semiconductor device Jan. 11, 2011
7867851 Methods of forming field effect transistors on substrates Jan. 11, 2011
7867833 Semiconductor device utilizing a metal gate material such as tungsten and method of manufacturing the same Jan. 11, 2011
7858508 Semiconductor device and method of manufacturing the same Dec. 28, 2010
7833860 Recessed gate dielectric antifuse Nov. 16, 2010
7834394 Semiconductor structure and method of fabricating the same Nov. 16, 2010
7829418 Semiconductor apparatus and method for fabricating the same Nov. 9, 2010
7804130 Self-aligned V-channel MOSFET Sep. 28, 2010
7799641 Method for forming a semiconductor device having recess channel Sep. 21, 2010
7790548 Methods of fabricating field effect transistors including recessed forked gate structures Sep. 7, 2010
7790551 Method for fabricating a transistor having a recess gate structure Sep. 7, 2010
7785964 Non-volatile semiconductor memory device and method of manufacturing the same Aug. 31, 2010
7749878 Method for manufacturing a semiconductor device Jul. 6, 2010
7750393 Non-volatile memory device with independent channel regions adjacent different sides of a common control gate Jul. 6, 2010
7745319 System and method for fabricating a fin field effect transistor Jun. 29, 2010
7696044 Method of making an array of non-volatile memory cells with floating gates formed of spacers in substrate trenches Apr. 13, 2010
7696045 Method of manufacturing semiconductor device Apr. 13, 2010
7687383 Methods of depositing electrically active doped crystalline Si-containing films Mar. 30, 2010
7678653 Method of fabricating a recess gate type transistor Mar. 16, 2010
7655522 Metal oxide semiconductor (MOS) transistor having a recessed gate electrode and methods of fabricating the same Feb. 2, 2010

1 2 3 4










 
 
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