EPIVALLEY CO., LTD. Patent applications |
Patent application number | Title | Published |
20110233603 | SEMICONDUCTOR LIGHT-EMITTING DEVICE - The present disclosure relates to a semiconductor light-emitting device including: a plurality of semiconductor layers having a first semiconductor layer with a first conductivity, a second semiconductor layer with a second conductivity different from the first conductivity, and an active layer interposed between the first semiconductor layer and the second semiconductor layer and generating light by recombination of electrons and holes; a bonding pad electrically connected to the plurality of semiconductor layers; a first electrode spread over the plurality of semiconductor layers; and a second electrode extended from the bonding pad to the first electrode and electrically connecting the bonding pad to the first electrode. | 09-29-2011 |
20110062487 | SEMICONDUCTOR LIGHT EMITTING DEVICE - The present disclosure relates to a semiconductor light emitting device, the semiconductor light emitting device comprising: a plurality of openings positioned between first electrode and second electrode, the plurality of openings defining a first opening region for suppressing current flow between the first electrode and the second electrode and a second opening region for relatively less suppressing current flow than the first opening region. | 03-17-2011 |
20110001158 | III-NITRIDE SEMICONDUCTOR LIGHT EMITTING DEVICE - The present disclosure relates to a Ill-nitride semiconductor light emitting device, comprising: a substrate with a plurality of protrusions formed thereon, each of the plurality of protrusions having three acute portions and three obtuse portions; and a plurality of Ill-nitride semiconductor layers formed over the substrate and including an active layer for generating light by recombination of electrons and holes. | 01-06-2011 |
20100289431 | Dimming Control Method for Display - The present disclosure provides a dimming control method for a display having a light-emitting device which includes: a first light-emitting body including an active layer generating a first light by recombination of electrons and holes; and a second light-emitting body excited by the first light and emitting a second light having a longer wavelength than the first light, the dimming control method including: controlling the power which will be supplied to the light-emitting device according to a dimming request; and adjusting the brightness of the display according to the controlled power using the second light-emitting body containing a first fluorescent material having a characteristic that chromaticity coordinates are shifted in a first direction according to the power control and a second fluorescent material having a characteristic that chromaticity coordinates are shifted in a second direction opposite to the first direction according to the power control. | 11-18-2010 |
20100289036 | III-NITRIDE SEMICONDUCTOR LIGHT EMITTING DEVICE AND METHOD FOR MANUFACTURING THE SAME - The present invention provides a Ill-nitride semiconductor light emitting device and a method for manufacturing the same including: a substrate; a plurality of Ill-nitride semiconductor layers formed on the substrate, and provided with an active layer generating light by recombination of electrons and holes; a boundary surface defined between the substrate and the plurality of Ill-nitride semiconductor layers; and a pair of slant surfaces formed from the boundary surface on the substrate and the plurality of Ill-nitride semiconductor layers so as to emit light generated in the active layer to the outside. | 11-18-2010 |
20100140656 | Semiconductor Light-Emitting Device - The present disclosure relates to a semiconductor light-emitting device generating light by recombination of electrons and holes. The semiconductor light-emitting device includes: a first bonding electrode and a second bonding electrode supplying the current for the recombination of the electrons and holes; a first branch electrode and a second branch electrode extended from the first bonding electrode; and a third branch electrode extended from the second bonding electrode, located between the first branch electrode and the second branch electrode, and having a first interval from the first branch electrode and a second interval smaller than the first interval from the second branch electrode. The second branch electrode is located farther from the center of the light-emitting device than the first branch electrode, and the second branch electrode is located farther from the center of the light-emitting device than the third branch electrode. | 06-10-2010 |
20100133579 | III-Nitride Semiconductor Light Emitting Device - The present disclosure relates to a III-nitride semiconductor light-emitting device including: a plurality of III-nitride semiconductor layers having a first III-nitride semiconductor layer having a first conductivity type, a second III-nitride semiconductor layer having a second conductivity type different from the first conductivity type, and an active layer disposed between the first III-nitride semiconductor layer and the second III-nitride semiconductor layer and generating light by recombination of electrons and holes; a bonding pad electrically connected to the plurality of III-nitride semiconductor layers; a protection film disposed over the bonding pad; and a buffer pad disposed between the bonding pad and the protection film and formed to expose the bonding pad. | 06-03-2010 |
20100127239 | III-Nitride Semiconductor Light Emitting Device - The present disclosure relates to a III-nitride semiconductor light-emitting device including an n-type nitride semiconductor layer, a p-type nitride semiconductor layer doped with a p-type dopant, an active layer disposed between the n-type nitride semiconductor layer and the p-type nitride semiconductor layer and including a quantum well layer to generate light by recombination of electrons and holes, and a diffusion barrier layer disposed between the quantum well layer and the p-type nitride semiconductor layer to be in contact with both layers, having a surface formed to make the interface with the p-type nitride semiconductor layer smooth, and to prevent diffusion of the p-type dopant into the quantum well layer. | 05-27-2010 |
20100102353 | III-Nitride Semiconductor Light Emitting Device - The present disclosure relates to a III-nitride semiconductor light-emitting device including a substrate, a plurality of III-nitride semiconductor layers positioned on the substrate and including an active layer which generates light by recombination of electrons and holes, and a surface scattering the light generated in the active layer, the scattering surface including a first surface which is etched and a second surface which caps the first surface. | 04-29-2010 |
20100102352 | III-Nitride Semiconductor Light Emitting Device - The present disclosure relates to a III-nitride semiconductor light-emitting device including a substrate with a scattering zone formed therein, and a plurality of III-nitride semiconductor layers including a first III-nitride semiconductor layer formed over the substrate and having a first conductivity type, a second III-nitride semiconductor layer formed over the first III-nitride semiconductor layer and having a second conductivity type different from the first conductivity type, and an active layer disposed between the first III-nitride semiconductor layer and the second III-nitride semiconductor layer and generating light by recombination of electrons and holes. | 04-29-2010 |
20100102351 | Semiconductor Light Emitting Device and Method of Manufacturing the Same - The present disclosure relates to a semiconductor light-emitting device and a method of manufacturing the same, and more particularly, to a III-nitride semiconductor light-emitting device which improves external quantum efficiency by forming an irregular portion on a surface of a semiconductor layer by a protrusion formed on a substrate, and a method of manufacturing the same. | 04-29-2010 |
20100102338 | III-Nitride Semiconductor Light Emitting Device - The present disclosure relates to a III-nitride semiconductor light-emitting device including a substrate, a plurality of III-nitride semiconductor layers including a first nitride semiconductor layer formed over the substrate and having a first conductivity type, a second nitride semiconductor layer formed over the first nitride semiconductor layer and having a second conductivity type different from the first conductivity type, and an active layer disposed between the first nitride semiconductor layer and the second nitride semiconductor layer and generating light by recombination of electrons and holes, and an opening formed along the plurality of III-nitride semiconductor layers from the substrate, and including a first scattering surface scattering the light generated in the active layer and a second scattering surface having a different slope from that of the first scattering surface. | 04-29-2010 |
20100096651 | III-Nitride Semiconductor Light Emitting Device - The present disclosure relates to a III-nitride semiconductor light-emitting device including a substrate with a first groove and a second groove formed therein, the substrate including a first surface and a second surface opposite to the first surface, a plurality of III-nitride semiconductor layers including a first semiconductor layer formed over the first surface of the substrate, a second semiconductor layer formed over the first III-nitride semiconductor layer, and an active layer disposed between the first and second III-nitride semiconductor layers and generating light by recombination of electrons and holes, a first opening formed on the first groove, a second opening formed on the second groove, a first electrode electrically connected from the second surface to the first III-nitride semiconductor layer through the first groove, and a second electrode electrically connected from the second surface to the second III-nitride semiconductor layer through the second groove and the second opening. | 04-22-2010 |
20090283789 | Semiconductor Light Emitting Device - The present disclosure relates to a semiconductor light emitting device which generates light by recombination of electrons and holes, and which includes: a first finger electrode for supplying one of the electrons and holes, a second finger electrode supplying the other of the electrons and holes, and spaced apart from the first finger electrode at a first interval; and a third finger electrode electrically connected to the first finger electrode, and spaced apart from the second finger electrode at a second interval which is smaller than the first interval. | 11-19-2009 |
20090166662 | III-Nitride Semiconductor Light Emitting Device - The present disclosure relates to a III-nitride semiconductor light emitting device comprising: a plurality of III-nitride semiconductor layers with an active layer generating light by recombination of holes and electrons; and a branch electrode provided with an arm extended from the p-side bonding pad toward the n-side electrode and two fingers branched off toward the n-side electrode from the arm. | 07-02-2009 |
20090152578 | III-Nitride Semiconductor Light Emitting Device - The present disclosure relates to a III-nitride semiconductor light emitting device which improves external quantum efficiency by using a p-type nitride semiconductor layer with a rough surface, the p-type nitride semiconductor layer including: a first nitride semiconductor layer with a first doping concentration, a second nitride semiconductor layer with a second doping concentration lower than the first doping concentration and with the rough surface, and a third nitride semiconductor layer with a higher doping concentration than a second doping concentration. | 06-18-2009 |
20090085057 | III-Nitride Semiconductor Light Emitting Device - The present disclosure relates to a III-nitride semiconductor light emitting device, and more particularly, to a III-nitride semiconductor light emitting device which can facilitate current spreading and improve electrostatic discharge characteristic by providing an undoped GaN layer with a thickness over 100 Å in an n-side contact layer. | 04-02-2009 |
20090085054 | III-Nitride Semiconductor Light Emitting Device - The present disclosure relates to a III-nitride semiconductor light emitting device, and more particularly, to a III-nitride semiconductor light emitting device which can facilitate current spreading and improve electrostatic discharge characteristic by providing an undoped GaN layer with a thickness over 300 Å in an n-side contact layer. | 04-02-2009 |
20090032835 | III-NITRIDE SEMICONDUCTOR LIGHT EMITTING DEVICE - The present disclosure provides a III-nitride semiconductor light emitting device, including: a plurality of III-nitride semiconductor layers including an active layer for generating light by recombination of electrons and holes; and a substrate used to grow the plurality of III-nitride semiconductor layers, and including a protrusion with two opposite sides rounded. | 02-05-2009 |
20090020771 | III-Nitride Semiconductor Light Emitting Device And Method For Manufacturing The Same - The present disclosure relates to an III-nitride compound semiconductor light emitting device and a method of manufacturing the same. The III-nitride compound semiconductor light emitting device includes a substrate with a groove formed therein, a plurality of nitride compound semiconductor layers being grown on the substrate, and including an active layer for generating light by recombination of electron and hole, and an opening formed on the groove along the plurality of nitride compound semiconductor layers. | 01-22-2009 |
20080315240 | III-Nitride Semiconductor light Emitting Device - The present disclosure relates to an III-nitride semiconductor light emitting device, particularly, an electrode structure thereof. The III-nitride semiconductor light emitting device includes a substrate, a plurality of III-nitride semiconductor layers grown on the substrate, and composed of a first III-nitride semiconductor layer with first conductivity, a second III-nitride semiconductor layer with second conductivity different from the first conductivity, and an active layer positioned between the first III-nitride semiconductor layer and the second III-nitride semiconductor layer, for generating light by recombination of electrons and holes, and a hole passing through the substrate and the plurality of III-nitride semiconductor layers. | 12-25-2008 |
20080283865 | III-Nitride Compound Semiconductor Light Emitting Device - The present invention relates a III-nitride compound semiconductor light emitting device in which a first layer composed of a carbon-containing compound layer, such as an n-type or p-type silicon carbide (SiC), silicon carbon nitride (SiCN) or carbon nitride layer (CN) layer, is formed on the p-type III-nitride semiconductor layer of the existing III-nitride semiconductor light emitting device, and a second layer composed of a III-nitride semiconductor layer with a given thickness is formed on the first layer. | 11-20-2008 |