Patents by Inventor Tsun-Kai Ko

Tsun-Kai Ko 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: 20160190409
    Abstract: This disclosure discloses a light-emitting device. The light-emitting device includes a light-emitting diode, a metal bump, and a reflective insulation layer. The light-emitting diode includes an active layer, an insulation layer formed on the active layer and having a side surface, and a pad electrically connected to the active layer. The metal bump is formed on the pad. The reflective insulation layer covers the side surface.
    Type: Application
    Filed: December 23, 2015
    Publication date: June 30, 2016
    Inventors: Jai-Tai Kuo, Min-Hsun Hsieh, Lung-Kuan Lai, Wei-Kang Cheng, Chien-Liang Liu, Yih-Hua Renn, Shou-Lung Chen, Tsun-Kai Ko, Chi-Chih Pu
  • Publication number: 20160172543
    Abstract: A light-emitting element comprises a light-emitting semiconductor stack comprising a first semiconductor layer, a second semiconductor layer on the first semiconductor layer, and a light-emitting layer between the first semiconductor layer and the second semiconductor layer; a first electrode comprising multiple contact areas and multiple extension areas, wherein the multiple contact areas are physically separated from one another; and a first conductive part and a second conductive part formed on the light-emitting semiconductor stack and respectively electrically connected to the first semiconductor layer and the second semiconductor layer, wherein the first conductive part and the second conductive part each comprises a concave-convex profile.
    Type: Application
    Filed: February 23, 2016
    Publication date: June 16, 2016
    Inventors: Schang-Jing Hon, Chao-Hsing Chen, Tsun-Kai Ko, Chien-Fu Shen, Jia-Kuen Wang, Hung-Che Chen
  • Publication number: 20160141454
    Abstract: A light-emitting element, includes a substrate; a first light-emitting stack formed on the substrate, including a triangular upper surface parallel to the substrate, and wherein the triangular upper surface has three sides and three vertexes; a first electrode formed on the first light-emitting stack and located near a first side of the three sides of the triangular upper surface; and a second electrode formed on the first light-emitting stack; including a second electrode pad near a first vertex of the three vertexes; and a second electrode extending part extending from the second electrode pad in two directions, disposed along other two sides of the three sides to surround the first electrode and stopping at the first side to form an opening.
    Type: Application
    Filed: November 12, 2015
    Publication date: May 19, 2016
    Inventors: Hsin-Ying WANG, De-Shan KUO, Wen-Hung CHUANG, Tsun-Kai KO, Chia-Chen TSAI, Chyi-Yang SHEU, Chun-Chang CHEN
  • Patent number: 9306123
    Abstract: A light-emitting element comprises a light-emitting semiconductor stack comprising a first semiconductor layer, a second semiconductor layer on the first semiconductor layer, and a light-emitting layer between the first semiconductor layer and the second semiconductor layer; a first electrode comprising an contact area and an extension electrically connected to the first semiconductor layer, wherein the extension is connected to the contact area; a second electrode on the second semiconductor layer; and a first conductive part and a second conductive part formed on the light-emitting semiconductor stack and respectively electrically connected to the first electrode and the second electrode, wherein the extension is formed beyond a projected area of the second conductive part and not covered by the first conductive part, and the contact area is covered by the first conductive part.
    Type: Grant
    Filed: August 17, 2015
    Date of Patent: April 5, 2016
    Assignee: EPISTAR CORPORATION
    Inventors: Schang-Jing Hon, Chao-Hsing Chen, Tsun-Kai Ko, Chien-Fu Shen, Jia-Kuen Wang, Hung-Che Chen
  • Patent number: 9306124
    Abstract: A light-emitting device includes a semiconductor light emitting stack and an electrode on the semiconductor light emitting stack, wherein the electrode includes a mirror layer, an adhesion layer inserted between the mirror layer and the semiconductor light emitting stack, a bonding layer, and a barrier layer inserted between the mirror layer and the bonding layer and covering the mirror layer to prevent the mirror layer from reacting with the bonding layer, wherein the barrier layer includes a first pair of different metals.
    Type: Grant
    Filed: May 17, 2012
    Date of Patent: April 5, 2016
    Assignee: EPISTAR CORPORATION
    Inventors: Ting-Chia Ko, De-Shan Kuo, Chien-Kai Chung, Tsun-Kai Ko
  • Patent number: 9269855
    Abstract: A method of manufacturing a light-emitting device comprising the steps of cutting a substrate by a laser beam to form a cavity in the substrate and generate a by-product directly on the substrate by the cutting, and removing the by-product by a chemical solution containing an acid under a predetermined cleaning temperature.
    Type: Grant
    Filed: December 4, 2013
    Date of Patent: February 23, 2016
    Assignee: EPISTAR CORPORATION
    Inventors: Chien-Kai Chung, Ya Lan Yang, Ting-Chia Ko, Tsun-Kai Ko, Jung-Min Hwang, Schang-Jing Hon, De-Shan Kuo, Chien-Fu Shen, Ta-Cheng Hsu, Min-Hsun Hsieh
  • Publication number: 20160049442
    Abstract: A light-emitting structure, comprising a substrate; a first unit and a second unit, separately formed on the substrate; a trench between the first unit and the second unit; and an electrical connection, electrically connecting the first unit and the second unit and comprising a bridging portion and a joining portion extending from the bridging portion, wherein the bridging portion is wider than the joining portion and the bridging portion is configured to cover the trench, and the joining portion is configured to cover first unit and the second unit.
    Type: Application
    Filed: October 27, 2015
    Publication date: February 18, 2016
    Inventors: Chien-Fu SHEN, Chao-Hsing CHEN, Tsun-Kai KO, Schang-Jing HON, Sheng-Jie HSU, De-Shan KUO, Hsin-Ying WANG, Chiu-Lin YAO, Chien-Fu HUANG, Hsin-Mao LIU, Chien-Kai CHUN
  • Publication number: 20160027745
    Abstract: The present disclosure provides a light emitting device including a serially-connected LED array comprising a plurality of LED cells on a substrate. The serially-connected LED array includes a first LED cell, a second LED cell, and a serially-connected LED sub-array comprising at least three LED cells intervening between the first and second LED cell; and a plurality of conducting metals formed on the LED cells to electrically connect the plurality of LED cell in series; wherein among the LED sub-array which are continuously and sequentially connected by the conducting metals, each LED cell connects to a previous LED cell by a first connecting direction and connects to a next LED cell by a second connecting direction, the first connecting direction is not parallel to the second connecting direction.
    Type: Application
    Filed: October 2, 2015
    Publication date: January 28, 2016
    Inventors: Chao Hsing CHEN, Chien Fu SHEN, Tsun Kai KO, Schang Jing HON, Hsin Mao LIU
  • Publication number: 20160005926
    Abstract: An optoelectronic device, comprising: a first semiconductor layer comprising four boundaries, a corner formed by two of the neighboring boundaries, a first surface, and a second surface opposite to the first surface; a second semiconductor layer formed on the first surface of the first semiconductor layer; a second conductive type electrode formed on the second semiconductor layer; and two first conductive type electrodes formed on the first surface, wherein the first conductive type electrodes are separated and formed a pattern.
    Type: Application
    Filed: July 6, 2015
    Publication date: January 7, 2016
    Inventors: Chao-Hsing CHEN, Jia-Kuen WANG, Chien-Chih LIAO, Tzu-Yao TSENG, Tsun-Kai KO, Chien-Fu SHEN
  • Patent number: 9231024
    Abstract: A light-emitting element includes: a substrate being a monocrystalline structure, comprising a plurality of recesses; and a plurality of first light-emitting stacks formed in the recesses respectively.
    Type: Grant
    Filed: September 23, 2011
    Date of Patent: January 5, 2016
    Assignee: EPISTAR CORPORATION
    Inventors: Ching-San Tao, Ting-Chia Ko, De-Shan Kuo, Tsun-Kai Ko
  • Patent number: 9231158
    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: Grant
    Filed: August 31, 2011
    Date of Patent: January 5, 2016
    Assignee: 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: 9231164
    Abstract: A light-emitting device comprises a first semiconductor layer; and a transparent conductive oxide layer comprising a diffusion region having a first metal material and a non-diffusion region devoid of the first metal material, wherein the non-diffusion region is closer to the first semiconductor layer than the diffusion region.
    Type: Grant
    Filed: April 12, 2013
    Date of Patent: January 5, 2016
    Assignee: EPISTAR CORPORATION
    Inventors: Ting-Chia Ko, De-Shan Kuo, Chun-Hsiang Tu, Po-Shun Chiu, Chien-Kai Chung, Hui-Chun Yeh, Min-Yen Tsai, Tsun-Kai Ko
  • Publication number: 20150357524
    Abstract: A light-emitting element comprises a light-emitting semiconductor stack comprising a first semiconductor layer, a second semiconductor layer on the first semiconductor layer, and a light-emitting layer between the first semiconductor layer and the second semiconductor layer; a first electrode comprising an contact area and an extension electrically connected to the first semiconductor layer, wherein the extension is connected to the contact area; a second electrode on the second semiconductor layer; and a first conductive part and a second conductive part formed on the light-emitting semiconductor stack and respectively electrically connected to the first electrode and the second electrode, wherein the extension is formed beyond a projected area of the second conductive part and not covered by the first conductive part, and the contact area is covered by the first conductive part.
    Type: Application
    Filed: August 17, 2015
    Publication date: December 10, 2015
    Inventors: Schang-Jing HON, Chao-Hsing CHEN, Tsun-Kai KO, Chien-Fu SHEN, Jia-Kuen WANG, Hung-Che CHEN
  • Patent number: 9196605
    Abstract: An embodiment of the present application discloses a light-emitting structure, comprising a substrate, a first unit and a second unit separately form on the substrate; a trench formed between the first unit and the second unit, and having a bottom portion exposing the substrate, a less steep sidewall and a steeper sidewall steeper than the less steep sidewall; and an electrical connection connecting the first unit and the second unit and covering the first unit, the second unit and the less steep sidewall; wherein the sidewalls directly connect to the bottom portion, and the steeper sidewall is devoid of the electrical connection covering.
    Type: Grant
    Filed: September 13, 2011
    Date of Patent: November 24, 2015
    Assignee: EPISTAR CORPORATION
    Inventors: Chien-Fu Shen, Chao-Hsing Chen, Tsun-Kai Ko, Schang-Jing Hon, Sheng-Jie Hsu, De-Shan Kuo, Hsin-Ying Wang, Chiu-Lin Yao, Chien-Fu Huang, Hsin-Mao Liu, Chien-Kai Chung
  • Patent number: D743355
    Type: Grant
    Filed: July 22, 2014
    Date of Patent: November 17, 2015
    Assignee: EPISTAR CORPORATION
    Inventors: Hsin-Ying Wang, Chien-Kai Chung, Yu-Ting Huang, Tsun-Kai Ko
  • Patent number: D748592
    Type: Grant
    Filed: March 12, 2015
    Date of Patent: February 2, 2016
    Assignee: EPISTAR CORPORATION
    Inventors: Hui-Chun Yeh, Chien-Fu Shen, Tsun-Kai Ko
  • Patent number: D750580
    Type: Grant
    Filed: October 30, 2014
    Date of Patent: March 1, 2016
    Assignee: Epistar Corporation
    Inventors: Hui-Chun Yeh, Chien-Fu Shen, Tsun-Kai Ko
  • Patent number: D752249
    Type: Grant
    Filed: September 29, 2014
    Date of Patent: March 22, 2016
    Assignee: EPISTAR CORPORATION
    Inventors: Chien-Fu Shen, Tsun-Kai Ko, Schang-Jing Hon
  • Patent number: D752527
    Type: Grant
    Filed: September 26, 2014
    Date of Patent: March 29, 2016
    Assignee: EPISTAR CORPORATION
    Inventors: Chao Hsing Chen, Tsun Kai Ko, Chien Fu Shen, Jia Kuen Wang, Chien Chih Liao, Tsung Hsun Chiang
  • Patent number: D760179
    Type: Grant
    Filed: October 22, 2014
    Date of Patent: June 28, 2016
    Assignee: EPISTAR CORPORATION
    Inventors: Chao Hsing Chen, Tsun Kai Ko, Chien Fu Shen, Jia Kuen Wang, Hung Che Chen, Chun Teng Ko, Chien Chih Liao