Patents by Inventor Cheng-Ta Kuo

Cheng-Ta Kuo 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).

  • Publication number: 20140231858
    Abstract: A LED sub-mount includes a substrate body and a plurality of first electrical-conductive layers. The substrate body has a first surface. The first electrical-conductive layers are positioned on the first surface of the substrate body, wherein the first surface between every adjacent two of the first electrical-conductive layers has an adhesive-filling groove.
    Type: Application
    Filed: February 7, 2014
    Publication date: August 21, 2014
    Applicant: Lextar Electronics Corporation
    Inventors: Chia-En Lee, Cheng-Ta Kuo, Der-Ling Hsia
  • Patent number: 8729525
    Abstract: The present application relates to an opto-electronic device. The opto-electronic device includes an n-cladding layer, a p-cladding layer and a multi-quantum well structure. The multi-quantum well structure is located between the p-cladding layer and the n-cladding layer, and includes a plurality of barrier layers, a plurality of well layers and a barrier tuning layer. The barrier tuning layer is made by doping the barrier layer adjacent to the p-cladding layer with an impurity therein for changing an energy barrier thereof to improve the light extraction efficiency of the opto-electronic device.
    Type: Grant
    Filed: August 25, 2009
    Date of Patent: May 20, 2014
    Assignee: Epistar Corporation
    Inventors: Jui-Yi Chu, Cheng-Ta Kuo, Yu-Pin Hsu, Chun-Kai Wang, Hsin-Hsien Wu, Yi-Chieh Lin
  • Patent number: 8487317
    Abstract: This invention discloses a GaN semiconductor device comprising a substrate; a metal-rich nitride compound thin film on the substrate; a buffer layer formed on the metal-rich nitride compound thin film, and a semiconductor stack layer on the buffer layer wherein the metal-dominated nitride compound thin film covers a partial upper surface of the substrate. Because metal-rich nitride compound is amorphous, the epitaxial growth direction of the buffer layer grows upwards in the beginning and then turns laterally, and the epitaxy defects of the buffer layer also bend with the epitaxial growth direction of the buffer layer. Therefore, the probability of the epitaxial defects extending to the semiconductor stack layer is reduced and the reliability of the GaN semiconductor device is improved.
    Type: Grant
    Filed: March 27, 2009
    Date of Patent: July 16, 2013
    Assignee: Epistar Corporation
    Inventors: Yi-Chieh Lin, Cheng-Ta Kuo, Yu-Pin Hsu, Chi-Ming Tsai
  • Patent number: 8445327
    Abstract: A wafer-level packaging process of a light-emitting diode is provided. First, a semiconductor stacked layer is formed on a growth substrate. A plurality of barrier patterns and a plurality of reflective layers are then formed on the semiconductor stacked layer, wherein each reflective layer is surrounded by one of the barrier patterns. A first bonding layer is then formed on the semiconductor stacked layer to cover the barrier patterns and the reflective layers. Thereafter, a carrying substrate having a plurality of second bonding layers and a plurality of conductive plugs electrically insulated from each other is provided, and the first bonding layer is bonded with the second bonding layer. The semiconductor stacked layer is then separated from the growth substrate. Next, the semiconductor stacked layer is patterned to form a plurality of semiconductor stacked patterns. Next, each semiconductor stacked pattern is electrically connected to the conductive plug.
    Type: Grant
    Filed: February 23, 2012
    Date of Patent: May 21, 2013
    Assignee: Lextar Electronics Corp.
    Inventors: Chia-En Lee, Cheng-Ta Kuo, Der-Ling Hsia
  • Patent number: 8415683
    Abstract: The present invention provides a manufacturing method of an LED chip. First, a device layer is formed on a growth substrate, wherein the device layer has a first surface connected to the growth substrate and a second surface. Next, a plurality of first trenches are formed on the second surface of the device layer. Then, a protection layer is formed on the side walls of the first trenches. After that, the second surface is bonded with a supporting substrate and the device layer is then separated from the growth substrate. Further, a plurality of second trenches corresponding to the first trenches are formed in the device layer to form a plurality of LEDs, wherein the second trenches extend from the first surface to the bottom portions of the first trenches. Furthermore, a plurality of electrodes are formed on the first surface of the device layer.
    Type: Grant
    Filed: May 12, 2009
    Date of Patent: April 9, 2013
    Assignee: Lextar Electronics Corp.
    Inventors: Chia-En Lee, Cheng-Ta Kuo, Der-Ling Hsia
  • Patent number: 8278681
    Abstract: A wafer-level packaging process of a light-emitting diode is provided. First, a semiconductor stacked layer is formed on a growth substrate. A plurality of barrier patterns and a plurality of reflective layers are then formed on the semiconductor stacked layer, wherein each reflective layer is surrounded by one of the barrier patterns. A first bonding layer is then formed on the semiconductor stacked layer to cover the barrier patterns and the reflective layers. Thereafter, a carrying substrate having a plurality of second bonding layers and a plurality of conductive plugs electrically insulated from each other is provided, and the first bonding layer is bonded with the second bonding layer. The semiconductor stacked layer is then separated from the growth substrate. Next, the semiconductor stacked layer is patterned to form a plurality of semiconductor stacked patterns. Next, each semiconductor stacked pattern is electrically connected to the conductive plug.
    Type: Grant
    Filed: May 20, 2009
    Date of Patent: October 2, 2012
    Assignee: Lextar Electronics Corp.
    Inventors: Chia-En Lee, Cheng-Ta Kuo, Der-Ling Hsia
  • Publication number: 20120211794
    Abstract: This disclosure discloses a light-emitting device. The light-emitting device comprises: a light-emitting stack having an upper surface and a lower surface; a pad, arranged on the upper surface, comprising: a first bonding region; and a second bonding region physically connected to the first bonding region through a connecting region having a connecting width; a first electrode connected to the first bonding region; a second electrode connected to the second bonding region; and a third electrode extending from the pad and arranged between the first electrode and the second electrode. At least one of the first electrode, the second electrode, and the third electrode has a width smaller than the connecting width.
    Type: Application
    Filed: April 30, 2012
    Publication date: August 23, 2012
    Applicant: EPISTAR CORPORATION
    Inventors: Chien-Fu SHEN, Cheng-Ta Kuo, Wei-Shou Chen, Tsung-Hsien Liu, Yi-Wen Ku, Min-Hsun Hsieh
  • Publication number: 20120168768
    Abstract: A semiconductor structure is provided. The semiconductor structure includes: a substrate; one or more semiconductor device layers formed on the substrate; and one or more lattice breaking areas formed on the surface of the substrate between the semiconductor device layers. The invention also provides a method for fabricating a semiconductor structure.
    Type: Application
    Filed: December 29, 2011
    Publication date: July 5, 2012
    Applicant: LEXTAR ELECTRONICS CORPORATION
    Inventors: Kuo-Lung FANG, Chi-Wen KUO, Cheng-Ta KUO
  • Publication number: 20120164768
    Abstract: A wafer-level packaging process of a light-emitting diode is provided. First, a semiconductor stacked layer is formed on a growth substrate. A plurality of barrier patterns and a plurality of reflective layers are then formed on the semiconductor stacked layer, wherein each reflective layer is surrounded by one of the barrier patterns. A first bonding layer is then formed on the semiconductor stacked layer to cover the barrier patterns and the reflective layers. Thereafter, a carrying substrate having a plurality of second bonding layers and a plurality of conductive plugs electrically insulated from each other is provided, and the first bonding layer is bonded with the second bonding layer. The semiconductor stacked layer is then separated from the growth substrate. Next, the semiconductor stacked layer is patterned to form a plurality of semiconductor stacked patterns. Next, each semiconductor stacked pattern is electrically connected to the conductive plug.
    Type: Application
    Filed: February 23, 2012
    Publication date: June 28, 2012
    Applicant: LEXTAR ELECTRONICS CORP.
    Inventors: Chia-En Lee, Cheng-Ta Kuo, Der-Ling Hsia
  • Patent number: 8188505
    Abstract: A light-emitting device comprises a substrate, an epitaxial structure formed on the substrate including a first semiconductor layer, a second semiconductor layer, and a light-emitting layer formed between the first semiconductor layer and the second semiconductor layer. A trench is formed in the epitaxial structure to expose a part of side surface of the epitaxial structure and a part of surface of the first semiconductor layer, so that a first conductive structure is formed on the part of surface of the first semiconductor layer in the trench, and a second conductive structure is formed on the second semiconductor layer. The first conductive structure includes a first electrode and a first pad electrically contacted with each other. The second conductive structure includes a second electrode and a second pad electrically contacted with each other. Furthermore, the area of at least one of the first pad and the second pad is between 1.5×104?m2 and 6.2×104 ?m2.
    Type: Grant
    Filed: November 21, 2008
    Date of Patent: May 29, 2012
    Assignee: Epistar Corporation
    Inventors: Chien-Fu Shen, Cheng-Ta Kuo, Wei-Shou Chen, Tsung-Hsien Liu, Yi-Wen Ku, Min-Hsun Hsieh
  • Publication number: 20110312113
    Abstract: A light-emitting diode (LED) structure and a method for manufacturing the LED structure are disclosed for promoting the recognition rate of LED chips, wherein a roughness degree of the surface under a first electrode pad of a first conductivity type is made similar to that of the surface under a second electrode pad of a second conductivity type, so that the luster shown from the first electrode pad can be similar to that from the second electrode pad, thus resolving the poor recognition problem of wire-bonding machines caused by different lusters from the first and second electrode pads.
    Type: Application
    Filed: August 31, 2011
    Publication date: December 22, 2011
    Applicant: EPISTAR CORPORATION
    Inventors: Cheng-Ta Kuo, Kuo-Hui Yu, Chao-Hsing Chen, Tsun-Kai Ko, Chi-Ming Huang, Shih-Wei Yen, Chien-Kai Chung
  • Patent number: 8076686
    Abstract: A light-emitting diode and the manufacturing method thereof are disclosed. The manufacturing method includes the steps of: sequentially forming a bonding layer, a geometric pattern layer, a reflection layer, an epitaxial structure and a first electrode on a permanent substrate, wherein the geometric pattern layer has a periodic structure; and forming a second electrode on one side of the permanent substrate.
    Type: Grant
    Filed: March 10, 2008
    Date of Patent: December 13, 2011
    Assignee: Epistar Corporation
    Inventors: Kuo-Hui Yu, Yu-Cheng Yang, An-Ru Lin, Tsun-Kai Ko, Wei-Shou Chen, Yi-Wen Ku, Cheng-Ta Kuo
  • Patent number: 8012777
    Abstract: A packaging process of a light emitting diode (LED) is provided. First, an LED chip is bonded with a carrier to electrically connect to each other. After that, the carrier is heated to raise the temperature thereof. Next, an encapsulant is formed on the heated carrier by a dispensing process to encapsulate the LED chip, wherein the viscosity of the encapsulant before contacting the carrier is lower than that of the encapsulant after contacting the carrier. Thereafter, the encapsulant is cured.
    Type: Grant
    Filed: July 2, 2009
    Date of Patent: September 6, 2011
    Assignee: Lextar Electronics Corp.
    Inventors: Wen-Sung Chang, Cheng-Ta Kuo
  • Patent number: 8008680
    Abstract: A light-emitting diode (LED) device and manufacturing methods thereof are provided, wherein the LED device comprises a substrate, a first type conductivity semiconductor layer, an active layer, a second type conductivity semiconductor layer, a transparent conductive oxide stack structure, a first electrode, and a second electrode. The first semiconductor layer on the substrate has a first portion and a second portion. The active layer and the second semiconductor layer are subsequently set on the first portion. The transparent conductive oxide stack structure on the second semiconductor layer has at least two resistant interfaces. The first electrode is above the second portion, and the second electrode is above the transparent conductive oxide stack structure.
    Type: Grant
    Filed: September 21, 2010
    Date of Patent: August 30, 2011
    Assignee: Epistar Corporation
    Inventors: Kuo-Hui Yu, Yu-Cheng Yang, Cheng-Ta Kuo
  • Patent number: 7935981
    Abstract: A light emitting diode (LED) package includes a carrier, an LED chip, an encapsulant, a plurality of phosphor particles, and a plurality of anti-humidity particles. The LED chip is disposed on and electrically connected to the carrier. The encapsulant encapsulates the LED chip. The phosphor particles and the anti-humidity particles are distributed within the encapsulant. A first light emitted from the LED chip excites the phosphor particles to emit a second light. Some of the anti-humidity particles are adhered onto a surface of the phosphor particles, while the other anti-humidity particles are not adhered onto the surface of the phosphor particles. The anti-humidity particles absorb H2O so as to avoid H2O from being reacted with the phosphor particles. The LED package of the present application has favorable water resistance.
    Type: Grant
    Filed: July 6, 2009
    Date of Patent: May 3, 2011
    Assignee: Lextar Electronics Corp.
    Inventors: Yu-Chun Lee, Ya-Hsien Chang, Cheng-Ta Kuo
  • Publication number: 20110057207
    Abstract: An white-light emitting device including a carrier, light emitting diode (LED) chips, and a wavelength converting material is provided. The LED chips are disposed on and electrically connected to the carrier. An equivalent wavelength of the first light emitted from the LED chips and divided into groups is ?. A variation of peak wavelengths of the LED chips in one group is smaller than 5 nm. ? meets an equation: ? = ? 1 n ? ( ? ? ? i × Ni × Ki ) ? 1 n ? Ni × Ki n is an integer equal to or larger than 2. ?i, Ni, and Ki are respectively an average peak wavelength, an quantity, and an average output efficiency of the LED chips in one group. The variation of ?i in different groups is ??i. 5 nm???i?30 nm. The wavelength converting material is excited by the first light to emit a second light. The first light and the second light are mixed to generate a white light.
    Type: Application
    Filed: October 28, 2009
    Publication date: March 10, 2011
    Applicant: LEXTAR ELECTRONICS CORP.
    Inventors: Feng-Cheng Su, Cheng-Ta Kuo, Chih-Hao Yang
  • Patent number: 7902562
    Abstract: A light-emitting diode device (LED) device and manufacturing methods thereof are provided, wherein the LED device comprises a substrate, a first n-type semiconductor layer, an n-type three-dimensional electron cloud structure, a second n-type semiconductor layer, an active layer and a p-type semiconductor layer. The first n-type semiconductor layer, the n-type three-dimensional electron cloud structure, the second n-type semiconductor layer, the active layer and the p-type semiconductor layer are subsequently grown on the substrate.
    Type: Grant
    Filed: August 18, 2008
    Date of Patent: March 8, 2011
    Assignee: Epistar Corporation
    Inventors: Cheng-Ta Kuo, Yu-Pin Hsu, Chun-Kai Wang, Jui-Yi Chu, Tsung-Kuang Chen
  • Patent number: 7888162
    Abstract: This application discloses a method of manufacturing a photoelectronic device comprising steps of providing a semiconductor stack layer, forming at least one metal adhesive on the semiconductor stack layer by a printing technology, forming an electrode by heating the metal adhesive to remove the solvent in the metal adhesive, wherein an ohmic contact is formed between the electrode and the semiconductor stack layer.
    Type: Grant
    Filed: July 29, 2009
    Date of Patent: February 15, 2011
    Assignee: Epistar Corporation
    Inventors: Yu-Ling Chin, Li-Pin Jou, Yu-Chih Yang, Yu-Cheng Yang, Wei-Shou Chen, Cheng-Ta Kuo
  • Publication number: 20110006701
    Abstract: A light-emitting diode (LED) device and manufacturing methods thereof are provided, wherein the LED device comprises a substrate, a first type conductivity semiconductor layer, an active layer, a second type conductivity semiconductor layer, a transparent conductive oxide stack structure, a first electrode, and a second electrode. The first semiconductor layer on the substrate has a first portion and a second portion. The active layer and the second semiconductor layer are subsequently set on the first portion. The transparent conductive oxide stack structure on the second semiconductor layer has at least two resistant interfaces. The first electrode is above the second portion, and the second electrode is above the transparent conductive oxide stack structure.
    Type: Application
    Filed: September 21, 2010
    Publication date: January 13, 2011
    Inventors: Kuo-Hui YU, Yu-Cheng YANG, Cheng-Ta KUO
  • Patent number: 7821026
    Abstract: A light-emitting diode (LED) device and manufacturing methods thereof are provided, wherein the LED device comprises a substrate, a first type conductivity semiconductor layer, an active layer, a second type conductivity semiconductor layer, a transparent conductive oxide stack structure, a first electrode, and a second electrode. The first semiconductor layer on the substrate has a first portion and a second portion. The active layer and the second semiconductor layer are subsequently set on the first portion. The transparent conductive oxide stack structure on the second semiconductor layer has at least two resistant interfaces. The first electrode is above the second portion, and the second electrode is above the transparent conductive oxide stack structure.
    Type: Grant
    Filed: September 8, 2008
    Date of Patent: October 26, 2010
    Assignee: Epistar Corporation
    Inventors: Kuo-Hui Yu, Yu-Cheng Yang, Cheng-Ta Kuo