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Class Information
Number: 257/E21.177
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) > Manufacture of electrode on semiconductor body using process other than by epitaxial growth, diffusion of impurities, alloying of impurity materials, or radiation bombardment (epo) > Manufacture or post-treatment of electrode having a capacitive structure, i.e., gate structure for field-effect device (epo) > Mos-gate structure (epo)
Description: This subclass is indented under subclass E21.176. This subclass is substantially the same in scope as ECLA classification H01L21/28B2.

Sub-classes under this class:

Class Number Class Name Patents
257/E21.179 Floating or plural gate structure (epo) 302
257/E21.183 For charge-coupled device (epo) 6
257/E21.18 Gate structure with charge-trapping insulator (epo) 87
257/E21.178 Joint-gate structure (epo) 5
257/E21.182 On semiconductor body comprising group iv element excluding non-elemental si, e.g., ge, c, diamond, silicon compound or compound, such as sic or sige (epo) 73
257/E21.181 On semiconductor body not comprising group iv element, e.g., group iii-v compound (epo) 3

Patents under this class:
1 2

Patent Number Title Of Patent Date Issued
8647952 Encapsulation of closely spaced gate electrode structures Feb. 11, 2014
8637369 Method for manufacturing an integrated power device having gate structures within trenches Jan. 28, 2014
8624324 Connecting through vias to devices Jan. 7, 2014
8609482 Enhancing interface characteristics between a channel semiconductor alloy and a gate dielectric by an oxidation process Dec. 17, 2013
8575012 Semiconductor device production method and semiconductor device Nov. 5, 2013
8501608 Method for processing semiconductor device Aug. 6, 2013
8492259 Method of forming metal gate structure Jul. 23, 2013
8440560 Method for fabricating tungsten line and method for fabricating gate of semiconductor device using the same May. 14, 2013
8404535 Metal gate transistor and method for fabricating the same Mar. 26, 2013
8399344 Method for adjusting the threshold voltage of a gate stack of a PMOS device Mar. 19, 2013
8309449 Semiconductor device and method for forming the same Nov. 13, 2012
8298885 Semiconductor device comprising metal gates and a silicon containing resistor formed on an isolation structure Oct. 30, 2012
8298888 Creating integrated circuit capacitance from gate array structures Oct. 30, 2012
8293631 Semiconductor devices having tensile and/or compressive stress and methods of manufacturing Oct. 23, 2012
8283218 Production methods of a patterned thin film, semiconductor element, and circuit substrate using fluid resist material Oct. 9, 2012
8274111 Method for fabricating a semiconductor memory device having a buried word line structure Sep. 25, 2012
8252675 Methods of forming CMOS transistors with high conductivity gate electrodes Aug. 28, 2012
8232152 Removing method of a hard mask Jul. 31, 2012
8198633 Stress transfer enhancement in transistors by a late gate re-crystallization Jun. 12, 2012
8178914 Method of fabricating back-illuminated imaging sensors May. 15, 2012
8174064 Semiconductor device and method for forming the same May. 8, 2012
8134205 Layout structure of power MOS transistor Mar. 13, 2012
8124515 Gate etch optimization through silicon dopant profile change Feb. 28, 2012
8076729 Semiconductor device having a dual gate electrode and methods of making the same Dec. 13, 2011
8053346 Semiconductor device and method of forming gate and metal line thereof with dummy pattern and auxiliary pattern Nov. 8, 2011
8026162 Method of manufacturing layer-stacked wiring Sep. 27, 2011
7985638 Method of manufacturing semiconductor device Jul. 26, 2011
7985652 Metal stress memorization technology Jul. 26, 2011
7964918 Semiconductor device and method for manufacturing the same Jun. 21, 2011
7943446 Method of producing semiconductor device and semiconductor device May. 17, 2011
7943500 Semiconductor device and method of manufacturing the same May. 17, 2011
7915110 MOS transistor manufacturing Mar. 29, 2011
7892933 Semiconductor device and method of manufacturing semiconductor device Feb. 22, 2011
7892961 Methods for forming MOS devices with metal-inserted polysilicon gate stack Feb. 22, 2011
7871916 Transistor gate electrode having conductor material layer Jan. 18, 2011
7871914 Methods of fabricating semiconductor devices with enlarged recessed gate electrodes Jan. 18, 2011
7863677 Semiconductor device and method of fabricating the same Jan. 4, 2011
7858460 Passivation of wide band-gap based semiconductor devices with hydrogen-free sputtered nitrides Dec. 28, 2010
7851834 Cascode current mirror and method Dec. 14, 2010
7829403 Method for fabricating semiconductor device Nov. 9, 2010
7807558 Method of fabricating a semiconductor device Oct. 5, 2010
7799624 Method of forming a thin film component Sep. 21, 2010
7790627 Semiconductor device, method of manufacturing the same, and method of manufacturing metal compound thin film Sep. 7, 2010
7791148 Semiconductor device Sep. 7, 2010
7713828 Semiconductor device and method of forming the same May. 11, 2010
7678678 Method to chemically remove metal impurities from polycide gate sidewalls Mar. 16, 2010
7659199 Air break for improved silicide formation with composite caps Feb. 9, 2010
7638851 Semiconductor device in peripheral circuit region using a dummy gate Dec. 29, 2009
7622342 Method of fabricating back-illuminated imaging sensors Nov. 24, 2009
7611978 Method for forming gate electrode of semiconductor device Nov. 3, 2009

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