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Class Information
Number: 257/14
Name: Active solid-state devices (e.g., transistors, solid-state diodes) > Thin active physical layer which is (1) an active potential well layer thin enough to establish discrete quantum energy levels or (2) an active barrier layer thin enough to permit quantum mechanical tunneling or (3) an active layer thin enough to permit carrier transmission with substantially no scattering (e.g., superlattice quantum well, or ballistic transport device) > Heterojunction > Quantum well
Description: Subject matter wherein at least two heterojunctions are formed with a thin active layer of material having a relatively large carrier affinity between two materials with smaller carrier affinities, resulting in a quantum mechanical energy well located in the thin active layer with the relatively large carrier affinity.

Sub-classes under this class:

Class Number Class Name Patents
257/23 Current flow across well 150
257/25 Employing resonant tunneling 316
257/24 Field effect device 545
257/15 Superlattice 443

Patents under this class:

Patent Number Title Of Patent Date Issued
8710533 Multicolored light converting LED with minimal absorption Apr. 29, 2014
8710489 Epitaxial substrate for electronic device, in which current flows in lateral direction and method of producing the same Apr. 29, 2014
8710488 Nanowire structured photodiode with a surrounding epitaxially grown P or N layer Apr. 29, 2014
8704268 Semiconductor light emitting device Apr. 22, 2014
8704248 Coupled asymmetric quantum confinement structures Apr. 22, 2014
8704209 Photodetectors using resonance and method of making Apr. 22, 2014
8692228 Semiconductor light emitting device and wafer Apr. 8, 2014
8686401 Ultraviolet irradiation apparatus Apr. 1, 2014
8686400 Light emitting device having a light emitting structure including an interface layer Apr. 1, 2014
8685877 Doping of nanostructures Apr. 1, 2014
8680510 Method of forming compound semiconductor Mar. 25, 2014
8680508 Semiconductor light emitting device and method for manufacturing same Mar. 25, 2014
8674340 Nitride semiconductor light emitting device and fabrication method thereof Mar. 18, 2014
8674338 Semiconductor light emitting device Mar. 18, 2014
8664681 Parallel plate slot emission array Mar. 4, 2014
8659005 Staggered composition quantum well method and device Feb. 25, 2014
8659004 Light emitting diode, light emitting diode lamp, and illuminating apparatus Feb. 25, 2014
8653503 Optoelectronic device based on non-polar and semi-polar aluminum indium nitride and aluminum indium gallium nitride alloys Feb. 18, 2014
8653501 Emitting device and manufacturing method therefor Feb. 18, 2014
8648355 Semiconductor light emitting device having one or more recesses on a layer Feb. 11, 2014
8642992 Group III nitride compound semiconductor light emitting device Feb. 4, 2014
8633471 Apparatus and methods for forming a modulation doped non-planar transistor Jan. 21, 2014
8633092 Quantum well device Jan. 21, 2014
8629425 Tunable wavelength light emitting diode Jan. 14, 2014
8624269 Radiation-emitting thin-film semiconductor chip and method of producing a radiation-emitting thin film semiconductor chip Jan. 7, 2014
8614136 Techniques for fabricating janus MEMS transistors Dec. 24, 2013
8610105 Semiconductor electroluminescent device with a multiple-quantum well layer formed therein Dec. 17, 2013
8598566 Controlled quantum dot growth Dec. 3, 2013
8592800 Optical devices featuring nonpolar textured semiconductor layers Nov. 26, 2013
8587113 Thermal plate with planar thermal zones for semiconductor processing Nov. 19, 2013
8586999 Apparatus pertaining to a core of wide band-gap material having a graphene shell Nov. 19, 2013
8586965 Group III nitride semiconductor light-emitting device Nov. 19, 2013
8586964 P-type semiconductor device comprising type-2 quantum well and fabrication method thereof Nov. 19, 2013
8581229 III-V light emitting device with thin n-type region Nov. 12, 2013
8575594 Light emitting diode having a barrier layer with a superlattice structure Nov. 5, 2013
8575593 Semiconductor light emitting device and fabrication method thereof Nov. 5, 2013
8569739 Chemically-etched nanostructures and related devices Oct. 29, 2013
8569738 Semiconductor light emitting device, wafer, method for manufacturing semiconductor light emitting device, and method for manufacturing wafer Oct. 29, 2013
8569736 Light emitting diode Oct. 29, 2013
8567960 Quantum photonic imagers and methods of fabrication thereof Oct. 29, 2013
8558257 Coupled asymmetric quantum confinement structures Oct. 15, 2013
8558215 Light emitting device, light emitting device package, method of manufacturing light emitting device and lighting system Oct. 15, 2013
8551868 Irradiation assisted nucleation of quantum confinements by atomic layer deposition Oct. 8, 2013
8546805 Two-beam laser annealing with improved temperature performance Oct. 1, 2013
8541869 Cleaved facet (Ga,Al,In)N edge-emitting laser diodes grown on semipolar bulk gallium nitride substrates Sep. 24, 2013
8541770 Select devices including an open volume, memory devices and systems including same, and methods for forming same Sep. 24, 2013
8541769 Formation of a graphene layer on a large substrate Sep. 24, 2013
8541252 Abbreviated epitaxial growth mode (AGM) method for reducing cost and improving quality of LEDs and lasers Sep. 24, 2013
8530257 Band offset in alingap based light emitters to improve temperature performance Sep. 10, 2013
8525151 Apparatus and methods for improving parallel conduction in a quantum well device Sep. 3, 2013

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