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Class Information
Number: 257/E21.305
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) > Treatment of semiconductor body using process other than deposition of semiconductor material on a substrate, diffusion or alloying of impurity material, or radiation treatment (epo) > To change their surface-physical characteristics or shape, e.g., etching, polishing, cutting (epo) > Deposition/post-treatment of noninsulating, e.g., conductive - or resistive - layers on insulating layers (epo) > Post treatment (epo) > Physical or chemical etching of layer, e.g., to produce a patterned layer from pre-deposited extensive layer (epo)
Description: This subclass is indented under subclass E21.3 This subclass is substantially the same in scope as ECLA classification H01L21/3213.

Sub-classes under this class:

Class Number Class Name Patents
257/E21.306 By physical means only (epo) 57
257/E21.308 By chemical means only (epo) 13
257/E21.314 Using mask (epo) 778

Patents under this class:
1 2

Patent Number Title Of Patent Date Issued
8647981 Methods of forming patterns, and methods of forming integrated circuitry Feb. 11, 2014
8592321 Method for fabricating an aperture Nov. 26, 2013
8569080 Method for packaging light emitting diode Oct. 29, 2013
8569180 Method and structure of wafer level encapsulation of integrated circuits with cavity Oct. 29, 2013
8546265 Method, apparatus and program for manufacturing silicon structure Oct. 1, 2013
8530327 Nitride shallow trench isolation (STI) structures and methods for forming the same Sep. 10, 2013
8492278 Method of forming a plurality of spaced features Jul. 23, 2013
8450172 Non-insulating stressed material layers in a contact level of semiconductor devices May. 28, 2013
8399894 Semiconductor light emitting device Mar. 19, 2013
8362553 Multifunctional tape Jan. 29, 2013
8338291 Producing transistor including multiple reentrant profiles Dec. 25, 2012
8338282 Method for encapsulating a microcomponent using a mechanically reinforced cap Dec. 25, 2012
8298954 Sidewall image transfer process employing a cap material layer for a metal nitride layer Oct. 30, 2012
8217476 Micromechanical component and method for the manufacture thereof Jul. 10, 2012
8168508 Method of isolating nanowires from a substrate May. 1, 2012
8168520 Method of manufacturing semiconductor device May. 1, 2012
8143082 Wafer bonding of micro-electro mechanical systems to active circuitry Mar. 27, 2012
8017956 Semiconductor light emitting device Sep. 13, 2011
8012811 Methods of forming features in integrated circuits Sep. 6, 2011
8013330 Compound for organic electroluminescent device and organic electroluminescent device Sep. 6, 2011
8008657 Compound for organic electroluminescent device and organic electroluminescent device Aug. 30, 2011
8003539 Integrated assist features for epitaxial growth Aug. 23, 2011
7981772 Methods of fabricating nanostructures Jul. 19, 2011
7977168 Method for manufacturing semiconductor device Jul. 12, 2011
7977211 Method for reducing the thickness of substrates Jul. 12, 2011
7947548 Multifunctional tape May. 24, 2011
7915736 Microfeature workpieces and methods for forming interconnects in microfeature workpieces Mar. 29, 2011
7892977 Hard mask patterns of a semiconductor device and a method for forming the same Feb. 22, 2011
7867902 Methods of forming a contact structure Jan. 11, 2011
7843025 Micromechanical semiconductor sensor Nov. 30, 2010
7709274 Method for forming an RuOx electrode and structure May. 4, 2010
7666789 Method of manufacturing a variable resistance structure and method of manufacturing a phase-change memory device using the same Feb. 23, 2010
7651896 Method for manufacturing semiconductor device Jan. 26, 2010
7648902 Manufacturing method of redistribution circuit structure Jan. 19, 2010
7629245 Method of forming non-volatile memory device Dec. 8, 2009
7582568 Method of forming a phase changeable structure Sep. 1, 2009
7498209 Etching tape and method of fabricating array substrate for liquid crystal display using the same Mar. 3, 2009
7494839 Method for manufacturing a membrane sensor Feb. 24, 2009
7482281 Substrate processing method Jan. 27, 2009
7442644 Method for manufacturing nitride semiconductor wafer or nitride semiconductor device; nitride semiconductor wafer or nitride semiconductor device made by the same; and laser irradiating appara Oct. 28, 2008
7439184 Method of making comb-teeth electrode pair Oct. 21, 2008
7419906 Method for manufacturing a through conductor Sep. 2, 2008
7416977 Method for manufacturing display device, liquid crystal television, and EL television Aug. 26, 2008
7393768 Etching of structures with high topography Jul. 1, 2008
7368395 Method for fabricating a nano-imprinting mold May. 6, 2008
7297636 Methods for fabricating device features having small dimensions Nov. 20, 2007
7262134 Microfeature workpieces and methods for forming interconnects in microfeature workpieces Aug. 28, 2007
7250335 Methods of fabricating integrated circuit devices including self-aligned contacts with increased alignment margin Jul. 31, 2007
7169711 Method of using carbon spacers for critical dimension (CD) reduction Jan. 30, 2007
7132366 Method for fabricating semiconductor components using conductive layer and grooves Nov. 7, 2006

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