Patents by Inventor Tzong-Liang Tsai
Tzong-Liang Tsai has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 7804104Abstract: The invention discloses a light-emitting diode, including a substrate, a first conductive type semiconductor layer, a second conductive type semiconductor layer, a light-emitting layer and plural laminated structures. The first conductive type semiconductor layer, the light-emitting layer and the second conductive type semiconductor layer are formed on the substrate in sequence. The plural laminated structures are formed on the upper surface of the second conductive type semiconductor layer such that the upper surface is partially exposed. Each laminated structure consists of at least one first insulated layer with a high refractive index and at least one second insulated layer with a low refractive index, where the at least one first insulated layer and the at least one second insulated layer are alternately formed to obtain said each laminated structure. Thereby, light emitted from the light-emitting layer can be reflected by the laminated structures to enhance the light-extraction efficiency.Type: GrantFiled: April 10, 2009Date of Patent: September 28, 2010Assignee: Huga Optotech Inc.Inventors: Su-Hui Lin, Sheng-Hsien Hsu, Jing-Jie Dai, Tzong Liang Tsai
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Publication number: 20100237357Abstract: A light emitting device is provided which includes a substrate, a first semiconductor layer having a first region and a second region on the substrate; ac active layer is formed on the first region of the first semiconductor layer; a second semiconductor layer is formed on the active surface layer and the portion surface of the second semiconductor layer is a rough surface; a plurality of pillar structures with a hollow structure, and both of the outer surface and inner surface of the pillar structures are rough surface; a transparent conductive layer is formed to cover the plurality of pillar structures; a first electrode is formed on the transparent conductive layer; and a second electrode is formed on the second region of the first semiconductor layer.Type: ApplicationFiled: March 31, 2009Publication date: September 23, 2010Inventors: Tzong-Liang TSAI, Lin-Chieh KAO
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Publication number: 20100230706Abstract: The invention discloses a semiconductor light-emitting device, which includes a substrate, a first conductive type semiconductor material layer, a second conductive type semiconductor material layer, a light-emitting layer, a first electrode, a second electrode, and a plurality of bump structures. The first conductive type semiconductor material layer is formed on the substrate and has an upper surface which includes a first region and a second region distinct from the first region. The first electrode is formed on the first region. The light-emitting layer and the second conductive type semiconductor material layer are formed on the second region. The bump structures are formed on the upper surface of the first conductive type semiconductor material layer and between the first region and the second region. At least one recess is formed in the sidewall of each bump structure. Alternatively, the sidewall of each bump structure has a curved contour.Type: ApplicationFiled: April 6, 2010Publication date: September 16, 2010Applicant: HUGA OPTOTECH INC.Inventors: Tzong Liang Tsai, Wei-Kai Wang, Su-Hui Lin, Yi-Cun Lu
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Publication number: 20100193810Abstract: An optical device is provided which includes a first electrode; a substrate disposed on the first electrode; a plurality of multi-layer film structures disposed on the substrate, and the multi-layer film structure consisted of at least two insulated layer with different reflection index formed alternately; a first semiconductor conductive layer disposed on the substrate to cover the multi-layer film structure; an active layer disposed on the first semiconductor conductive layer; a second semiconductor conductive layer disposed on the active layer; a transparent conductive layer disposed on the second semiconductor conductive layer; and a second electrode disposed on the transparent conductive layer, thereby, the multi-layer structure can increase the light reflective effect or anti-reflective effect within the optical device to improve the light emitting effective.Type: ApplicationFiled: March 23, 2009Publication date: August 5, 2010Inventors: Tzong-Liang TSAI, Lin-Chieh Kao, Shu-Ying Yang
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Patent number: 7768027Abstract: The invention discloses a semiconductor light-emitting device, which includes a substrate, a first conductive type semiconductor material layer, a second conductive type semiconductor material layer, a light-emitting layer, a first electrode, a second electrode, and a plurality of bump structures. The first conductive type semiconductor material layer is formed on the substrate and has an upper surface which includes a first region and a second region distinct from the first region. The first electrode is formed on the first region. The light-emitting layer and the second conductive type semiconductor material layer are formed on the second region. The bump structures are formed on the upper surface of the first conductive type semiconductor material layer and between the first region and the second region. Each bump structure is made of ITO, SiO2, SiN, ZnO, polymide, BCB, SOG, InO, or SnO.Type: GrantFiled: August 1, 2008Date of Patent: August 3, 2010Assignee: Huga Optotech Inc.Inventors: Tzong-Liang Tsai, Wei-Kai Wang, Su-Hui Lin, Yi-Cun Lu
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Patent number: 7768022Abstract: A light emitting diode and its fabricating method are disclosed. A light emitting diode epitaxy structure is formed on a substrate, and then the light emitting diode epitaxy structure is etched to form a recess. The recess is then filled with a transparent dielectric material. An adhesive layer is utilized to adhere a conductive substrate and the light emitting diode epitaxy structure. Next, the substrate is removed.Type: GrantFiled: April 19, 2005Date of Patent: August 3, 2010Assignee: Epistar CorporationInventors: Tzong-Liang Tsai, Way-Jze Wen, Chang-Han Chiang, Chih-Sung Chang
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Publication number: 20100176408Abstract: The invention discloses a light-emitting diode, including a substrate, a first conductive type semiconductor layer, a second conductive type semiconductor layer, a light-emitting layer and plural laminated structures. The first conductive type semiconductor layer, the light-emitting layer and the second conductive type semiconductor layer are formed on the substrate in sequence. The plural laminated structures are formed on the upper surface of the second conductive type semiconductor layer such that the upper surface is partially exposed. Each laminated structure consists of at least one first insulated layer with a high refractive index and at least one second insulated layer with a low refractive index, where the at least one first insulated layer and the at least one second insulated layer are alternately formed to obtain said each laminated structure. Thereby, light emitted from the light-emitting layer can be reflected by the laminated structures to enhance the light-extraction efficiency.Type: ApplicationFiled: April 10, 2009Publication date: July 15, 2010Inventors: Su-Hui LIN, Sheng-Hsien Hsu, Jing-Jie Dai, Tzong Liang Tsai
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Publication number: 20100176419Abstract: The invention discloses a light-emitting diode. In an embodiment, the light-emitting diode includes a substrate, a first doping type semiconductor layer, a second doping type semiconductor layer, a light-emitting layer and plural laminated structures. The first doping type semiconductor layer, the light-emitting layer and the second doping type semiconductor layer are formed on the substrate in sequence. The plural laminated structures are formed on the top surface of the second doping type semiconductor layer such that the top surface is partially exposed. Each laminated structure consists of plural transparent insulating layers which have their respective refractive indices. Additionally, each of the laminated structures is formed in a way of upwardly stacking the transparent insulating layers in sequence with the refractive indices of the transparent insulating layers decreasing gradually, so as to enhance the light-extraction efficiency and the lighting efficiency of the light-emitting diode.Type: ApplicationFiled: April 10, 2009Publication date: July 15, 2010Inventors: Su-Hui LIN, Sheng-Hsien Hsu, Jing-Jie Dai, Tzong Liang Tsai
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Patent number: 7745837Abstract: The invention discloses a semiconductor light-emitting device and a method of fabricating the same. The semiconductor light-emitting device according to the invention includes a substrate, a first semiconductor material layer, a multi-layer structure and an ohmic electrode structure. The substrate has a first upper surface and a plurality of recesses formed on the first upper surface. The first semiconductor material layer is formed on the first upper surface of the substrate and has a second upper surface. The multi-layer structure is formed on the second upper surface of the first semiconductor material layer and includes a light-emitting region. The ohmic electrode structure is formed on the multi-layer structure. In particular, the first semiconductor material layer has a refractive index different from those of the substrate and a bottom-most layer of the multi-layer structure.Type: GrantFiled: December 7, 2007Date of Patent: June 29, 2010Assignee: Huga Optotech Inc.Inventor: Tzong-Liang Tsai
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Patent number: 7737453Abstract: Disclosed is a light emitting diode structure including a Constructive Oxide Contact Structure contact layer. The light emitting diode structure comprises a substrate, a buffer layer formed on the substrate, a lower confinement layer formed on the buffer layer, a light emitting layer formed on the lower confinement layer, an upper confinement layer formed on the light emitting layer, a Constructive Oxide Contact Structure contact layer formed on the upper confinement layer whose conducting type can be P-type, N-type, or I-type, a first electrode, and a second electrode (transparent electrode). The transparent electrode is formed on the Constructive Oxide Contact Structure contact layer as an anode of the light emitting diode. The first electrode is formed on the lower confinement layer and is spaced apart from the light emitting layer, the upper confinement layer, the contact layer, and the transparent electrode. The first electrode is used as a cathode of the light emitting diode.Type: GrantFiled: May 4, 2007Date of Patent: June 15, 2010Assignee: Huga Optotech Inc.Inventors: Tzong-Liang Tsai, Chi-Shen Lee, Ting-Kai Huang
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Publication number: 20100101496Abstract: A wafer carrier comprises a base and a shielding plate positioned on the top surface of the base in a disassembled manner. The top surface of the base is configured to retain a plurality of wafers, and the shielding plate has a plurality of openings exposing the wafers. In particular, the shielding plate shields one portion of the base other than the other portions occupied by the wafers to prevent the reaction gases from conducting the chemical reaction to generate the reactant directly on the surface of the base. Consequently, the base is isolated from the chemical reaction, and it is not necessary to replace the base before conducting the next fabrication process or to clean the reactants on the surface of the base by thermal baking or etching.Type: ApplicationFiled: December 29, 2009Publication date: April 29, 2010Applicant: HUGA OPTOTECH INC.Inventors: CHIH CHING CHENG, TZONG-LIANG TSAI
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Publication number: 20100059773Abstract: A semiconductor light-emitting device comprises a substrate, a first conductive type semiconductor layer positioned on the substrate, a light-emitting structure positioned on the first conductive type semiconductor layer, and a second conductive type semiconductor layer positioned on the light-emitting structure. The substrate includes an upper surface and a plurality of protrusions positioned on the upper surface. Each of the protrusions includes a top surface, a plurality of wall surfaces, and a plurality of inclined surfaces sandwiched between the top surface and the wall surfaces.Type: ApplicationFiled: December 3, 2008Publication date: March 11, 2010Applicant: HUGA OPTOTECH INC.Inventors: CHIH CHING CHENG, TZONG-LIANG TSAI, SHU HUI LIN
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Patent number: 7659557Abstract: The invention provides a semiconductor light-emitting device with II-V group (or II-IV-V group) compound contact layer and a method of fabricating the same. The semiconductor light-emitting device according to a preferred embodiment of the invention includes a substrate, a first conductive type semiconductor material layer, a light-emitting layer, a first electrode, a second conductive type semiconductor material layer, a II-V group (or II-IV-V group) compound contact layer, a transparent conductive layer, and a second electrode. The existence of the II-V group (or II-IV-V group) compound contact layer improves the ohmic contact between the second conductive type semiconductor material layer and the transparent conductive layer.Type: GrantFiled: May 17, 2007Date of Patent: February 9, 2010Assignee: Huga Optotech Inc.Inventors: Chiung-Chi Tsai, Tzong-Liang Tsai, Yu-Chu Li
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Patent number: 7652302Abstract: A light emitting diode and the method of the same are provided. A light emitting diode epitaxy structure is formed on a substrate, and then the light emitting diode epitaxy structure is etched to form a recess. The recess is then filled with a transparent dielectric material. An ohmic contact layer and a reflective layer are formed sequentially, and then are etched to expose the transparent dielectric material. Finally, forming an adhesive conductive complex layer to fix the ohmic contact layer and the reflective layer on the light emitting diode epitaxy structure.Type: GrantFiled: April 19, 2005Date of Patent: January 26, 2010Assignee: Epistar CorporationInventors: Tzong-Liang Tsai, Way-Jze Wen, Chang-Han Chiang, Chih-Sung Chang
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Publication number: 20090308319Abstract: A wafer carrier comprises a base and a shielding plate positioned on the top surface of the base in a disassembled manner. The top surface of the base is configured to retain a plurality of wafers, and the shielding plate has a plurality of openings exposing the wafers. In particular, the shielding plate shields one portion of the base other than the other portions occupied by the wafers to prevent the reaction gases from conducting the chemical reaction to generate the reactant directly on the surface of the base. Consequently, the base is isolated from the chemical reaction, and it is not necessary to replace the base before conducting the next fabrication process or to clean the reactants on the surface of the base by thermal baking or etching.Type: ApplicationFiled: August 19, 2008Publication date: December 17, 2009Applicant: HUGA OPTOTECH INC.Inventors: CHIH CHING CHENG, TZONG-LIANG TSAI
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Publication number: 20090212311Abstract: The invention discloses a semiconductor light-emitting device, which includes a substrate, a first conductive type semiconductor material layer, a second conductive type semiconductor material layer, a light-emitting layer, a first electrode, a second electrode, and a plurality of bump structures. The first conductive type semiconductor material layer is formed on the substrate and has an upper surface which includes a first region and a second region distinct from the first region. The first electrode is formed on the first region. The light-emitting layer and the second conductive type semiconductor material layer are formed on the second region. The bump structures are formed on the upper surface of the first conductive type semiconductor material layer and between the first region and the second region. Each bump structure is made of ITO, SiO2, SiN, ZnO, polymide, BCB, SOG, InO, or SnO.Type: ApplicationFiled: August 1, 2008Publication date: August 27, 2009Inventors: Tzong-Liang Tsai, Wei-Kai Wang, Su-Hui Lin, Yi-Cun Lu
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Publication number: 20090212276Abstract: The present invention provides a light-emitting diode (LED) device and a fabrication method thereof. The LED device has a double-layered contact layer structure with a surface of one contact layer being patterned to increase ohmic contact area of the double-layered contact layer structure to lower an operation voltage of the LED device, and hence reducing power consumption.Type: ApplicationFiled: November 19, 2008Publication date: August 27, 2009Inventors: Ming-Huang HONG, Tzong-Liang Tsai
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Publication number: 20090212312Abstract: The invention discloses a semiconductor light-emitting device, which includes a substrate, a first conductive type semiconductor material layer, a second conductive type semiconductor material layer, a light-emitting layer, a first electrode, a second electrode, and a plurality of bump structures. The first conductive type semiconductor material layer is formed on the substrate and has an upper surface which includes a first region and a second region distinct from the first region. The first electrode is formed on the first region. The light-emitting layer and the second conductive type semiconductor material layer are formed on the second region. The bump structures are formed on the upper surface of the first conductive type semiconductor material layer and between the first region and the second region. Each bump structure is made of ITO, SiO2, SiN, ZnO, polymide, BCB, SOG, InO, or SnO.Type: ApplicationFiled: November 12, 2008Publication date: August 27, 2009Inventors: Tzong-Liang TSAI, Wei-Kai Wang, Su-Hui Lin, Yi-Cun Lu
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Publication number: 20090200667Abstract: The invention provides an ohmic contact film formed between a doped semiconductor material layer and a conductive material layer of a semiconductor device. The composition of the ohmic contact film according to a preferred embodiment of the invention is represented by the general formula MxQzNy, where M represents the II group chemical element, Q represents the IV group chemical element, N represents the V group chemical element, 1?x?3, 1?y?3, 1?z?3, and x and y and z are molar numbers.Type: ApplicationFiled: April 17, 2009Publication date: August 13, 2009Inventors: Chiung-Chi TSAI, Tzong-Liang Tsai, Yu-Chu Li
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Publication number: 20090057694Abstract: The present invention provides an optoelectronic device with an epi-stacked structure, which includes a substrate, a buffer layer that is formed on the substrate, in which the buffer layer includes a first nitrogen-containing compound layer, an II/V group compound layer is provided on the first nitrogen-containing compound layer, a second nitrogen-containing compound layer is provided on the II/V group compound layer, and a third nitrogen-containing compound layer is provided on the second nitrogen-containing compound layer, an epi-stacked stricture with a multi-layer structure is formed on the buffer layer, which includes a first semiconductor conductive layer is formed on the buffer layer, an active layer is formed on the first semiconductor conductive layer, a multi-layer structure is formed between the first semiconductor conductive layer and the active layer, and a second semiconductor conductive layer is formed on the active layer.Type: ApplicationFiled: April 2, 2008Publication date: March 5, 2009Inventor: Tzong-Liang TSAI