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Class Information
Number: 257/E21.215
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) > Chemical or electrical treatment, e.g., electrolytic etching (epo)
Description: This subclass is indented under subclass E21.214. This subclass is substantially the same in scope as ECLA classification H01L21/306.

Sub-classes under this class:

Class Number Class Name Patents
257/E21.224 Chemical cleaning (epo) 115
257/E21.219 Chemical etching (epo) 424
257/E21.216 Electrolytic etching (epo) 124
257/E21.218 Plasma etching; reactive-ion etching (epo) 852
257/E21.231 Using mask (epo) 246
257/E21.23 With simultaneous mechanical treatment, e.g., chemical-mechanical polishing (epo) 523

Patents under this class:
1 2 3 4 5

Patent Number Title Of Patent Date Issued
8648353 Method for manufacturing silicon carbide semiconductor device and the silicon carbide semiconductor device Feb. 11, 2014
8623769 Through hole forming method, nozzle plate and MEMS device Jan. 7, 2014
8546269 Top-down nanowire thinning processes Oct. 1, 2013
8530354 Substrate processing method Sep. 10, 2013
8513129 Planarizing etch hardmask to increase pattern density and aspect ratio Aug. 20, 2013
8509277 Optical device Aug. 13, 2013
8501611 Methods of forming integrated circuit devices having electrically conductive layers therein with partially nitridated sidewalls Aug. 6, 2013
8481435 Protein repelling silicon and germanium surfaces Jul. 9, 2013
8455286 Method of making a micro-electro-mechanical-systems (MEMS) device Jun. 4, 2013
8445385 Methods for etching carbon nano-tube films for use in non-volatile memories May. 21, 2013
8426257 Method for fabricating semiconductor device Apr. 23, 2013
8426235 Method for manufacturing capacitive electromechanical transducer Apr. 23, 2013
8405185 Semiconductor device and semiconductor module including the same Mar. 26, 2013
8399359 Manufacturing method for dual damascene structure Mar. 19, 2013
8399356 Manufacturing method of semiconductor device Mar. 19, 2013
8377820 Method of forming a metallization system of a semiconductor device by using a hard mask for defining the via size Feb. 19, 2013
8357571 Methods of forming semiconductor contacts Jan. 22, 2013
8324038 Method of removing a spacer, method of manufacturing a metal-oxide-semiconductor transistor device, and metal-oxide-semiconductor transistor device Dec. 4, 2012
8304316 Semiconductor device and method of forming a semiconductor device Nov. 6, 2012
8288258 Method for producing a semiconductor Oct. 16, 2012
8283198 Resistive memory and methods of processing resistive memory Oct. 9, 2012
8263986 Optically interrogated solid state biosensors incorporating porous materials--devices Sep. 11, 2012
8237192 Light emitting diode chip with overvoltage protection Aug. 7, 2012
8232128 Method of texturing solar cell and method of manufacturing solar cell Jul. 31, 2012
8227350 Controlling diamond film surfaces and layering Jul. 24, 2012
8226840 Methods of removing silicon dioxide Jul. 24, 2012
8222150 Method of manufacturing semiconductor device, template, and method of creating pattern inspection data Jul. 17, 2012
8222056 Manufacturing method of light-emitting diode Jul. 17, 2012
8216939 Methods of forming openings Jul. 10, 2012
8163630 Method of manufacturing a semiconductor device Apr. 24, 2012
8120125 MEMS devices having overlying support structures Feb. 21, 2012
8071482 Manufacturing method of a silicon carbide semiconductor device Dec. 6, 2011
8067314 Gate trim process using either wet etch or dry etch approach to target CD for selected transistors Nov. 29, 2011
8035103 Circuit board, electronic device, and method for producing circuit board Oct. 11, 2011
8003531 Method for manufacturing flash memory device Aug. 23, 2011
7981803 Method of forming micro pattern of semiconductor device Jul. 19, 2011
7981736 Systems and devices including multi-gate transistors and methods of using, making, and operating the same Jul. 19, 2011
7928012 Integrated circuit with upstanding stylus Apr. 19, 2011
7928520 Micro-fluidic structure Apr. 19, 2011
7858426 Method of texturing solar cell and method of manufacturing solar cell Dec. 28, 2010
7858508 Semiconductor device and method of manufacturing the same Dec. 28, 2010
7855152 Method of producing active matrix substrate Dec. 21, 2010
7811938 Method for forming gaps in micromechanical device and micromechanical device Oct. 12, 2010
7795056 Semiconductor device and method of fabricating the same Sep. 14, 2010
7790493 Wafer-level, polymer-based encapsulation for microstructure devices Sep. 7, 2010
7785920 Method for making a pillar-type phase change memory element Aug. 31, 2010
7776745 Method for etching silicon-germanium in the presence of silicon Aug. 17, 2010
7768018 Polarizer based on a nanowire grid Aug. 3, 2010
7759152 MEMS thermal actuator and method of manufacture Jul. 20, 2010
7749793 Method for fabricating lateral-moving micromachined thermal bimorph Jul. 6, 2010

1 2 3 4 5

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