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Class Information
Number: 257/E33.048
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) > Having heterojunction or graded gap (epo)
Description: This subclass is indented under subclass E33.044. This subclass is substantially the same in scope as ECLA classification H01L33/00D3.










Sub-classes under this class:

Class Number Class Name Patents
257/E33.05 Comprising only group ii-iv compound (epo) 13
257/E33.049 Comprising only group iii-v compound (epo) 244


Patents under this class:
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Patent Number Title Of Patent Date Issued
8653501 Emitting device and manufacturing method therefor Feb. 18, 2014
8647905 Semiconductor light emitting device and method for manufacturing same Feb. 11, 2014
8633496 Optical device and semiconductor wafer Jan. 21, 2014
8536615 Semiconductor device structures with modulated and delta doping and related methods Sep. 17, 2013
8525197 Semiconductor light emitting device and method for manufacturing same Sep. 3, 2013
8519437 Polarization doping in nitride based diodes Aug. 27, 2013
8519378 Semiconductor light-emitting element array including a semiconductor rod Aug. 27, 2013
8421195 Semiconductor devices with graded dopant regions Apr. 16, 2013
8367449 Semiconductor light-emitting apparatus and method of manufacturing the same Feb. 5, 2013
8344422 Semiconductor device Jan. 1, 2013
8304792 Semiconductor light emitting apparatus and optical print head Nov. 6, 2012
8294178 Light emitting device using compound semiconductor Oct. 23, 2012
8253215 Mesa heterojunction phototransistor and method for making same Aug. 28, 2012
8207545 Light-emitting device and display Jun. 26, 2012
8164105 Light emitting device and method for fabricating the same Apr. 24, 2012
8148714 Light-emitting device and method for producing light emitting device Apr. 3, 2012
8022389 Light source, and device Sep. 20, 2011
7919784 Semiconductor light-emitting device and method for making same Apr. 5, 2011
7683396 High power light emitting device assembly utilizing ESD protective means sandwiched between dual sub-mounts Mar. 23, 2010
7675076 Nitride-based semiconductor device of reduced voltage drop Mar. 9, 2010
7671375 Nitride-based semiconductor device of reduced voltage drop, and method of fabrication Mar. 2, 2010
7601985 Semiconductor light-emitting device Oct. 13, 2009
7592632 Light emitting device and display device using the same Sep. 22, 2009
7589347 Method for fabricating lateral semiconductor device Sep. 15, 2009
7531440 Semiconductor laser device, semiconductor laser system, optical pickup module and manufacturing for semiconductor laser system May. 12, 2009
7348602 Nitride semiconductor device Mar. 25, 2008
7148518 Group-III nitride semiconductor stack, method of manufacturing the same, and group-III nitride semiconductor device Dec. 12, 2006
5834378 Passivation of porous semiconductors for improved optoelectronic device performance and fabrication of light-emitting diode bases on same Nov. 10, 1998
5656828 Electronic component with a semiconductor composite structure Aug. 12, 1997
5646419 n-type wide bandgap semiconductors grown on a p-type layer to form hole injection pn heterojunctions and methods of fabricating the same Jul. 8, 1997
5500389 Process for formation for hetero junction structured film utilizing V grooves Mar. 19, 1996
5476812 Semiconductor heterojunction structure Dec. 19, 1995
5382812 Diamond and II-VI heterojunction semiconductor light emitting device Jan. 17, 1995
5334855 Diamond/phosphor polycrystalline led and display Aug. 2, 1994
5272355 Optoelectronic switching and display device with porous silicon Dec. 21, 1993
5228044 Ultraviolet semiconductor laser and method of manufacturing the same Jul. 13, 1993
5151756 Surface emitting heterojunction light emitting diode Sep. 29, 1992
5117267 Semiconductor heterojunction structure May. 26, 1992
5097298 Blue light emitting display element Mar. 17, 1992
5091758 Semiconductor light-emitting devices Feb. 25, 1992
5008891 Semiconductor light-emitting devices Apr. 16, 1991
4984034 Non-single-crystalline light emitting semiconductor device matrix with insulation Jan. 8, 1991
4940898 Semiconducting metal silicide radiation detectors Jul. 10, 1990
4914042 Forming a transition metal silicide radiation detector and source Apr. 3, 1990
4868614 Light emitting semiconductor device matrix with non-single-crystalline semiconductor Sep. 19, 1989
4782377 Semiconducting metal silicide radiation detectors and source Nov. 1, 1988
4665421 Photodiode comprising a resonator structure for increasing absorption May. 12, 1987
4527179 Non-single-crystal light emitting semiconductor device Jul. 2, 1985
4439399 Quaternary alloy Mar. 27, 1984
4429395 Semiconductor laser Jan. 31, 1984

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