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Class Information
Number: 257/E33.044
Name: Active solid-state devices (e.g., transistors, solid-state diodes) > Light emitting semiconductor devices having a potential or a surface barrier, processes or apparatus peculiar to the manufacture or treatment of such devices, or of parts thereof > Device characterized by their operation (epo)
Description: This subclass is indented under subclass E33.001. This subclass is substantially the same in scope as ECLA classification H01L33/00D.










Sub-classes under this class:

Class Number Class Name Patents
257/E33.053 Characterized by field-effect operation (epo) 179
257/E33.054 Device being superluminescent diode (epo) 96
257/E33.048 Having heterojunction or graded gap (epo) 54
257/E33.052 Having mis barrier layer (epo) 26
257/E33.045 Having p-n or hi-lo junction (epo) 118
257/E33.051 Having schottky barrier (epo) 36


Patents under this class:
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Patent Number Title Of Patent Date Issued
8679866 Light emitting device and display Mar. 25, 2014
8673702 Field shield dielectric as a mask during semiconductor ink jet printing Mar. 18, 2014
8471260 Pixel structure Jun. 25, 2013
8404528 Fabricating method of pixel structure Mar. 26, 2013
8405087 Pixel structure Mar. 26, 2013
8309375 Light emitting device and display Nov. 13, 2012
8304771 Pixel structure and fabricating method thereof Nov. 6, 2012
8304801 Illuminating means Nov. 6, 2012
8294167 Light emitting diode with high electrostatic discharge and fabrication method thereof Oct. 23, 2012
8269233 Vertical ACLED structure Sep. 18, 2012
8188500 Organic light-emitting element and light-emitting device using the same May. 29, 2012
8148177 Light emitting device and display Apr. 3, 2012
8129738 Optoelectronic device with periodic grating microstructure Mar. 6, 2012
8114698 High light extraction efficiency nitride based light emitting diode by surface roughening Feb. 14, 2012
7994522 Organic light emitting element and organic light emitting device Aug. 9, 2011
7989821 Infrared source Aug. 2, 2011
7989822 Optocoupler using silicon based LEDs Aug. 2, 2011
7943484 Method for laterally cutting through a semiconductor wafer and optoelectronic component May. 17, 2011
7901959 Liquid crystal display and back light having a light emitting diode Mar. 8, 2011
7863626 Surface mountable chip Jan. 4, 2011
7855092 Device for emitting white-color light Dec. 21, 2010
7683387 Thin film transistor substrate having electrode layers that are formed on insulating layer to cover common voltage line and grounding line Mar. 23, 2010
7682848 Light emitting device with blue light LED and phosphor components Mar. 23, 2010
7632691 Surface mountable chip Dec. 15, 2009
7622385 Wiring pattern forming method, film pattern forming method, semiconductor device, electro-optical device, and electronic equipment Nov. 24, 2009
7608861 Active matrix type display having two transistors of opposite conductivity acting as a single switch for the driving transistor of a display element Oct. 27, 2009
7601985 Semiconductor light-emitting device Oct. 13, 2009
7598530 Light emitting diode with high illumination Oct. 6, 2009
7550755 Semiconductor device with tunable energy band gap Jun. 23, 2009
7439548 Surface mountable chip Oct. 21, 2008
7361970 Method for production of a buried stop zone in a semiconductor component and semiconductor component comprising a buried stop zone Apr. 22, 2008
7355220 Array substrate Apr. 8, 2008
6974945 Photosensor Dec. 13, 2005
6946674 Low-dimensional plasmon light emitting device Sep. 20, 2005
6900466 Semiconductor component for generating polychromatic electromagnetic radiation May. 31, 2005
6847057 Semiconductor light emitting devices Jan. 25, 2005
6822991 Light emitting devices including tunnel junctions Nov. 23, 2004
6806521 Integrated high performance MOS tunneling LED in ULSI technology Oct. 19, 2004
6770903 Metal-oxide-silicon device including nanometer scaled oxide structure to enhance light-emitting efficiency Aug. 3, 2004
6534798 Surface plasmon enhanced light emitting diode and method of operation for the same Mar. 18, 2003
6515308 Nitride-based VCSEL or light emitting diode with p-n tunnel junction current injection Feb. 4, 2003
6365951 Methods on constructing an avalanche light emitting diode Apr. 2, 2002
6111274 Inorganic light emitting diode Aug. 29, 2000
5949182 Light-emitting, nanometer scale, micromachined silicon tips Sep. 7, 1999
5561304 Electroluminescent silicon device Oct. 1, 1996
5451977 Self-scanning light-emitting array and a driving method of the array Sep. 19, 1995
5414282 Semiconductor optoelectronic switch and method for driving the same May. 9, 1995
5340998 Semiconductor surface light emitting and receiving heterojunction device Aug. 23, 1994
5151756 Surface emitting heterojunction light emitting diode Sep. 29, 1992
5138624 Multiwavelength LED and laser diode optical source Aug. 11, 1992

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