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Class Information
Number: 257/E33.02
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 semiconductor body (epo) > Material of active region (epo) > Comprising only group ii-vi compound (epo) > Ternary or quaternary compound (e.g., cdhgte) (epo)
Description: This subclass is indented under subclass E33.019. This subclass is substantially the same in scope as ECLA classification H01L33/00C4C2.










Sub-classes under this class:

Class Number Class Name Patents
257/E33.021 With heterojunction (epo) 98


Patents under this class:

Patent Number Title Of Patent Date Issued
8643005 Organic light emitting display device and method for manufacturing the same Feb. 4, 2014
8148731 Films and structures for metal oxide semiconductor light emitting devices and methods Apr. 3, 2012
7612432 P-type ZnS based semiconductor material having a low resistance due to its high copper content Nov. 3, 2009
7525128 Zinc-oxide-based double-heterostructure light-emitting diode Apr. 28, 2009
7462881 Method of fabricating vertical structure LEDs Dec. 9, 2008
7189996 Electron injection composition for light emitting element, light emitting element, and light emitting device Mar. 13, 2007
6987029 ZnO based compound semiconductor light emitting device and method for manufacturing the same Jan. 17, 2006
6674098 ZnO compound semiconductor light emitting element Jan. 6, 2004
6590336 Light emitting device having a polar plane piezoelectric film and manufacture thereof Jul. 8, 2003
5949081 Dynamic infrared scene projector Sep. 7, 1999
5548127 Semiconductor light emitting device and its manufacturing method Aug. 20, 1996
5540786 Light emitting material Jul. 30, 1996
5399524 Method of providing an ohmic type contact on p-type Zn(S)Se Mar. 21, 1995
5371756 Semiconductor blue-green laser diodes Dec. 6, 1994
5324963 Electroluminescent semiconductor device having chalcogenide layer and mixed crystal layer Jun. 28, 1994
5293074 Ohmic contact to p-type ZnSe Mar. 8, 1994
5250814 Semiconductor light-emitting devices Oct. 5, 1993
5140385 Light emitting element and method of manufacture Aug. 18, 1992
5091758 Semiconductor light-emitting devices Feb. 25, 1992
5068204 Method of manufacturing a light emitting element Nov. 26, 1991
5045897 Quaternary II-VI materials for photonics Sep. 3, 1991
5043774 Light-emitting semiconductor device Aug. 27, 1991
4952811 Field induced gap infrared detector Aug. 28, 1990
4868615 Semiconductor light emitting device using group I and group VII dopants Sep. 19, 1989
4689125 Fabrication of cleaved semiconductor lasers Aug. 25, 1987
4263056 Method for the manufacture of light emitting and/or photodetective diodes Apr. 21, 1981











 
 
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