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Class Information
Number: 257/E21.412
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) > Thin film unipolar transistor (epo) > Amorphous silicon or polysilicon transistor (epo)
Description: This subclass is indented under subclass E21.411. This subclass is substantially the same in scope as ECLA classification H01L21/336D2.










Sub-classes under this class:

Class Number Class Name Patents
257/E21.414 Lateral single gate single channel transistor with inverted structure, i.e., channel layer is formed after gate (epo) 1,123
257/E21.413 Lateral single gate single channel transistor with noninverted structure, i.e., channel layer is formed before gate (epo) 1,610


Patents under this class:
1 2 3 4 5 6

Patent Number Title Of Patent Date Issued
8669557 Thin film transistor substrate and method for fabricating the same Mar. 11, 2014
8659026 Flat panel display Feb. 25, 2014
8643009 Transistor, semiconductor device including the transistor, and manufacturing method of the transistor and the semiconductor device Feb. 4, 2014
8637844 Method for fabrication of crystalline diodes for resistive memories Jan. 28, 2014
8633487 Transistor structure, manufacturing method of transistor structure, and light emitting apparatus Jan. 21, 2014
8608971 Method of manufacturing a display substrate Dec. 17, 2013
8598584 Thin-film transistor device and method of manufacturing the same Dec. 3, 2013
8580661 Method for the hydrogenation of poly-si Nov. 12, 2013
8502229 Array substrate for display device and method of fabricating the same Aug. 6, 2013
8492770 Thin film transistor and method of manufacturing the same Jul. 23, 2013
8487312 Semiconductor device and method of manufacturing the same Jul. 16, 2013
8476124 Method of manufacturing semiconductor device Jul. 2, 2013
8450158 Method for forming microcrystalline semiconductor film and method for manufacturing semiconductor device May. 28, 2013
8431496 Semiconductor device and manufacturing method thereof Apr. 30, 2013
8426863 Thin film transistor; method of manufacturing same; and organic light emitting device including the thin film transistor Apr. 23, 2013
8420458 Semiconductor device and method of producing same Apr. 16, 2013
8415678 Semiconductor device and display device Apr. 9, 2013
8405072 Organic electro-luminescent display and method of fabricating the same Mar. 26, 2013
8389343 Method for manufacturing semiconductor device Mar. 5, 2013
8383434 Thin film transistor and manufacturing method thereof Feb. 26, 2013
8367488 Manufacturing method of flexible semiconductor device Feb. 5, 2013
8350267 Flat panel display Jan. 8, 2013
8304767 Semiconductor device and production method thereof Nov. 6, 2012
8294224 Devices and methods to improve carrier mobility Oct. 23, 2012
8278657 Transistor, semiconductor device including the transistor, and manufacturing method of the transistor and the semiconductor device Oct. 2, 2012
8247316 Method for fabricating a transistor including a polysilicon layer formed using two annealing processes Aug. 21, 2012
8247812 Transistor, semiconductor device including the transistor, and manufacturing method of the transistor and the semiconductor device Aug. 21, 2012
8247813 Display device and electronic device including the same Aug. 21, 2012
8237167 Semiconductor device and manufacturing method thereof Aug. 7, 2012
8232147 Fabricating method of a thin film transistor having a dielectric layer for inhibiting leakage current Jul. 31, 2012
8183070 Array substrate for liquid crystal display device and method of fabricating the same May. 22, 2012
8178419 Method to texture a lamina surface within a photovoltaic cell May. 15, 2012
8143117 Active device array substrate and method for fabricating the same Mar. 27, 2012
8143623 Thin film transistor and manufacturing method thereof Mar. 27, 2012
8133770 Semiconductor device and method for manufacturing the same Mar. 13, 2012
8119468 Thin film transistor and method for manufacturing the same Feb. 21, 2012
8114720 Semiconductor device and manufacturing method thereof Feb. 14, 2012
8093127 Method for forming a vertical transistor having tensile layers Jan. 10, 2012
8080450 Method of manufacturing semiconductor thin film Dec. 20, 2011
8053297 Method of fabricating a thin film transistor using joule heat from the gate electrode to form a crystallized channel region Nov. 8, 2011
8039333 Semiconductor device and method of fabricating the same Oct. 18, 2011
8039349 Methods for fabricating non-planar semiconductor devices having stress memory Oct. 18, 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
8003195 Method for manufacturing display device Aug. 23, 2011
7998800 Method for manufacturing semiconductor device Aug. 16, 2011
7989326 Thin film transistor and method of fabricating the same Aug. 2, 2011
7968389 Fabrication methods of thin film transistor substrates Jun. 28, 2011
7960295 Film transistor and method for fabricating the same Jun. 14, 2011
7955958 Method for fabrication of polycrystalline diodes for resistive memories Jun. 7, 2011

1 2 3 4 5 6










 
 
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