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: 20210210659
    Abstract: A light-emitting device includes a semiconductor stack including a first semiconductor layer, a second semiconductor layer, and an active layer between the first semiconductor layer and the second semiconductor layer; one or multiple vias penetrating the active layer and the second semiconductor layer to expose the first semiconductor layer; a first contact layer covering the one or multiple vias; a third insulating layer including a first group of one or multiple third insulating openings on the second semiconductor layer to expose the first contact layer; a first pad on the semiconductor stack and covering the first group of one or multiple third insulating openings; and a second pad on the semiconductor stack and separated from the first pad with a distance, wherein the second pad is formed at a position other than positions of the one or multiple vias in a top view of the light-emitting device.
    Type: Application
    Filed: March 19, 2021
    Publication date: July 8, 2021
    Inventors: Chao-Hsing CHEN, Jia-Kuen WANG, Tzu-Yao TSENG, Bo-Jiun HU, Tsung-Hsun CHIANG, Wen-Hung CHUANG, Kuan-Yi LEE, Yu-Ling LIN, Chien-Fu SHEN, Tsun-Kai KO
  • Publication number: 20210202797
    Abstract: A light-emitting element includes a substrate including a first side, a second side and a third side connecting the first side and the second side; a light-emitting semiconductor stack on the substrate and including a first semiconductor layer, a second semiconductor layer, and a light-emitting layer between the first semiconductor layer and the second semiconductor layer; a first electrode on the first semiconductor layer and including a contact area and a first extension area; a second electrode on the second semiconductor layer; a protection layer on the light-emitting semiconductor stack and including a first through hole exposing the first electrode and a second through hole exposing the second electrode; a first conductive part on the protection layer and electrically connected to the first electrode; and a second conductive part on the protection layer and electrically connected to the second electrode, wherein the second conductive part comprises a projected area on the light-emitting semiconductor st
    Type: Application
    Filed: February 25, 2021
    Publication date: July 1, 2021
    Inventors: Schang-Jing HON, Chao-Hsing CHEN, Tsun-Kai KO, Chien-Fu SHEN, Jia-Kuen WANG, Hung-Che CHEN
  • Publication number: 20210183942
    Abstract: A light-emitting device, includes a substrate with a top surface; a first light-emitting structure unit and a second light-emitting structure unit separately formed on the top surface and adjacent to each other, and wherein the first light-emitting structure unit includes a first sidewall and a second sidewall; a trench between the first and the second light-emitting structure units; and an electrical connection arranged on the first sidewall and the second light-emitting structure unit, and electrically connecting the first light-emitting structure unit and the second light-emitting structure unit; wherein the first sidewall connects to the top surface; wherein the first sidewall faces the second light-emitting structure units, and the second sidewall is not between the first light-emitting structure unit and the second light-emitting structure unit; and wherein the second sidewall is steeper than the first sidewall.
    Type: Application
    Filed: February 8, 2021
    Publication date: June 17, 2021
    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: 11011679
    Abstract: An optoelectronic device, comprising a first semiconductor layer comprising four boundaries comprising two longer sides and two shorter sides; a second semiconductor layer formed on the first semiconductor layer; and a plurality of first conductive type electrodes formed on the first semiconductor layer, wherein one first part of the plurality of first conductive type electrodes is formed on a corner constituted by one of the two longer sides and one of the two shorter sides, and wherein one fourth part of the plurality of first conductive type electrodes is formed along the one of the two longer sides, the one fourth part of the plurality of first conductive type electrodes comprises a head portion and a tail portion, the head portion comprises a width larger than that of the tail portion.
    Type: Grant
    Filed: December 4, 2019
    Date of Patent: May 18, 2021
    Assignee: EPISTAR CORPORATION
    Inventors: Chao-Hsing Chen, Jia-Kuen Wang, Chien-Chih Liao, Tzu-Yao Tseng, Tsun-Kai Ko, Chien-Fu Shen
  • Patent number: 10985295
    Abstract: A light-emitting device comprises a semiconductor stack comprising a first semiconductor layer, a second semiconductor layer, and an active layer formed between the first semiconductor layer and the second semiconductor layer; a first contact layer on the first semiconductor layer; a second contact layer on the second semiconductor layer, wherein the first contact layer and the second contact layer comprise a metal material other than gold (Au) or copper (Cu); a first pad on the semiconductor stack; a second pad on the semiconductor stack.
    Type: Grant
    Filed: June 3, 2020
    Date of Patent: April 20, 2021
    Assignee: EPISTAR CORPORATION
    Inventors: Chao-Hsing Chen, Jia-Kuen Wang, Tzu-Yao Tseng, Bo-Jiun Hu, Tsung-Hsun Chiang, Wen-Hung Chuang, Kuan-Yi Lee, Yu-Ling Lin, Chien-Fu Shen, Tsun-Kai Ko
  • Patent number: 10964847
    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 reflective layer formed on the light-emitting semiconductor stack; a barrier layer formed on the reflective stack; a protection layer formed on the barrier layer, comprising a first through hole and a second through hole; a first height balancer filled in the first through hole and formed on the protection layer; a second height balancer filled in the second through hole and formed on the protection layer; and a conductive contact layer comprising a first conductive part formed on the first height balancer and a second conductive part formed on the second height balancer.
    Type: Grant
    Filed: June 19, 2019
    Date of Patent: March 30, 2021
    Assignee: EPISTAR CORPORATION
    Inventors: Schang-Jing Hon, Chao-Hsing Chen, Tsun-Kai Ko, Chien-Fu Shen, Jia-Kuen Wang, Hung-Che Chen
  • Patent number: 10950652
    Abstract: Disclosed herein is a light-emitting device.
    Type: Grant
    Filed: July 17, 2018
    Date of Patent: March 16, 2021
    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
  • Publication number: 20200295233
    Abstract: A light-emitting device comprises a semiconductor stack comprising a first semiconductor layer, a second semiconductor layer, and an active layer formed between the first semiconductor layer and the second semiconductor layer; a first contact layer on the first semiconductor layer; a second contact layer on the second semiconductor layer, wherein the first contact layer and the second contact layer comprise a metal material other than gold (Au) or copper (Cu); a first pad on the semiconductor stack; a second pad on the semiconductor stack.
    Type: Application
    Filed: June 3, 2020
    Publication date: September 17, 2020
    Inventors: Chao-Hsing CHEN, Jia-Kuen WANG, Tzu-Yao TSENG, Bo-Jiun HU, Tsung-Hsun CHIANG, Wen-Hung CHUANG, Kuan-Yi LEE, Yu-Ling LIN, Chien-Fu SHEN, Tsun-Kai KO
  • Patent number: 10680138
    Abstract: A light-emitting device comprises a semiconductor stack comprising a first semiconductor layer, a second semiconductor layer, and an active layer formed between the first semiconductor layer and the second semiconductor layer; a first pad on the semiconductor stack; a second pad on the semiconductor stack, wherein the first pad and the second pad are separated from each other with a distance, which define a region between the first pad and the second pad on the semiconductor stack; and multiple vias penetrating the active layer to expose the first semiconductor layer, wherein the first pad and the second pad are formed on regions other than the multiple vias.
    Type: Grant
    Filed: April 15, 2019
    Date of Patent: June 9, 2020
    Assignee: EPISTAR CORPORATION
    Inventors: Chao-Hsing Chen, Jia-Kuen Wang, Tzu-Yao Tseng, Bo-Jiun Hu, Tsung-Hsun Chiang, Wen-Hung Chuang, Kuan-Yi Lee, Yu-Ling Lin, Chien-Fu Shen, Tsun-Kai Ko
  • Publication number: 20200111935
    Abstract: An optoelectronic device, comprising a first semiconductor layer comprising four boundaries comprising two longer sides and two shorter sides; a second semiconductor layer formed on the first semiconductor layer; and a plurality of first conductive type electrodes formed on the first semiconductor layer, wherein one first part of the plurality of first conductive type electrodes is formed on a corner constituted by one of the two longer sides and one of the two shorter sides, and wherein one fourth part of the plurality of first conductive type electrodes is formed along the one of the two longer sides, the one fourth part of the plurality of first conductive type electrodes comprises a head portion and a tail portion, the head portion comprises a width larger than that of the tail portion.
    Type: Application
    Filed: December 4, 2019
    Publication date: April 9, 2020
    Inventors: Chao-Hsing CHEN, Jia-Kuen WANG, Chien-Chih LIAO, Tzu-Yao TSENG, Tsun-Kai KO, Chien-Fu SHEN
  • Patent number: 10546824
    Abstract: The present disclosure provides a light emitting device including an LED array including a plurality of LED cells connected in series disposed on a single substrate; wherein each LED cell includes a first edge, a second edge, a third edge, and a fourth edge, and wherein the LED array includes a first LED and a second LED, the first edge of the first LED is adjacent to the third edge of the second LED; a first trench, disposed between the first LED cell and the second LED; and a first conducting metal, disposed on the first trench, the first edge of the first LED and the third edge of the second LED, and electrically connecting the first LED and the second LED in series; wherein the first LED and/or the second LED includes a round corner in a top view.
    Type: Grant
    Filed: January 26, 2018
    Date of Patent: January 28, 2020
    Assignee: EPISTAR CORPORATION
    Inventors: Chao Hsing Chen, Chien Fu Shen, Tsun Kai Ko, Schang Jing Hon, Hsin Mao Liu
  • Patent number: 10529893
    Abstract: An optoelectronic device, comprising a first semiconductor layer comprising four boundaries comprising two longer sides and two shorter sides; a second semiconductor layer formed on the first semiconductor layer; and a plurality of first conductive type electrodes formed on the first semiconductor layer, wherein one first part of the plurality of first conductive type electrodes is formed on a corner constituted by one of the two longer sides and one of the two shorter sides, and wherein one fourth part of the plurality of first conductive type electrodes is formed along the one of the two longer sides, the one fourth part of the plurality of first conductive type electrodes comprises a head portion and a tail portion, the head portion comprises a width larger than that of the tail portion.
    Type: Grant
    Filed: November 21, 2017
    Date of Patent: January 7, 2020
    Assignee: EPISTAR CORPORATION
    Inventors: Chao-Hsing Chen, Jia-Kuen Wang, Chien-Chih Liao, Tzu-Yao Tseng, Tsun-Kai Ko, Chien-Fu Shen
  • Patent number: 10529895
    Abstract: An optoelectronic semiconductor device comprises a substrate; a semiconductor system including a first conductivity layer and a second conductivity layer, wherein the second conductivity layer comprises a top surface, and in a top view of the semiconductor system, an outline of the first conductivity layer surrounds an outline of the second conductivity layer; a first electrical connector on the first conductivity layer; a second electrical connector comprising a top view shape and directly contacting the second conductivity layer; a contact layer contacting the top surface of the second conductivity layer and having an outer perimeter at an inner side of the outline of the second conductivity layer in the top view of the semiconductor system; and a discontinuous region contacting the top surface of the second conductivity layer, wherein the contact layer covers a top surface and sidewalls of the discontinuous region.
    Type: Grant
    Filed: December 12, 2017
    Date of Patent: January 7, 2020
    Assignee: EPISTAR CORPORATION
    Inventors: Tsun-Kai Ko, Schang-Jing Hon, Chien-Kai Chung, Hui-Chun Yeh, An-Ju Lin, Chien-Fu Shen, Chen Ou
  • Patent number: 10490598
    Abstract: A light-emitting structure, comprising: a first light-emitting structure unit and a second light-emitting structure unit, adjacent to and spaced apart from each other; and an electrical connection arranged on the first light-emitting structure unit and the second light-emitting structure unit, and electrically connecting the first light-emitting structure unit and the second light emitting structure unit; wherein the first light-emitting structure unit comprises a first side surface and a second side surface; wherein the first side surface is between the first and the second light-emitting structure units, and the second side surface is not between the first light-emitting structure unit and the second light-emitting structure unit; and wherein the first side surface is inclined and a slope of the first side surface is gentler than a slope of the second side surface.
    Type: Grant
    Filed: May 25, 2017
    Date of Patent: November 26, 2019
    Assignee: EPISTAR CORPORATION
    Inventors: Jhih-Yong Yang, Hui-chun Yeh, Chien-Fu Shen, Tsun-Kai Ko
  • Publication number: 20190312179
    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 reflective layer formed on the light-emitting semiconductor stack; a barrier layer formed on the reflective stack; a protection layer formed on the barrier layer, comprising a first through hole and a second through hole; a first height balancer filled in the first through hole and formed on the protection layer; a second height balancer filled in the second through hole and formed on the protection layer; and a conductive contact layer comprising a first conductive part formed on the first height balancer and a second conductive part formed on the second height balancer.
    Type: Application
    Filed: June 19, 2019
    Publication date: October 10, 2019
    Inventors: Schang-Jing HON, Chao-Hsing CHEN, Tsun-Kai KO, Chien-Fu SHEN, Jia-Kuen WANG, Hung-Che CHEN
  • Patent number: 10396243
    Abstract: A light-emitting device includes: a rectangular shape with a first side, a second side opposite to the first side, and a third side connecting the first side and the second side; a light-emitting stack, comprising a lower semiconductor layer, an upper semiconductor layer, and an active layer between the lower semiconductor layer and the upper semiconductor layer; a first electrode formed on the lower semiconductor layer, comprising a first electrode pad and a first extension electrode; a second electrode formed on the upper semiconductor layer, comprising a second electrode pad and a second extension electrode; and a first current blocking layer formed between the lower semiconductor layer and the first electrode pad, wherein the first current blocking layer comprises a top surface and side surfaces; wherein the first electrode pad covers the top surface and the side surfaces of the first current blocking layer and contacts the lower semiconductor layer.
    Type: Grant
    Filed: July 9, 2018
    Date of Patent: August 27, 2019
    Assignee: Epistar Corporation
    Inventors: Chien-Kai Chung, Po-Shun Chiu, Hsin-Ying Wang, De-Shan Kuo, Tsun-Kai Ko, Yu-Ting Huang
  • Publication number: 20190245116
    Abstract: A light-emitting device comprises a semiconductor stack comprising a first semiconductor layer, a second semiconductor layer, and an active layer formed between the first semiconductor layer and the second semiconductor layer; a first pad on the semiconductor stack; a second pad on the semiconductor stack, wherein the first pad and the second pad are separated from each other with a distance, which define a region between the first pad and the second pad on the semiconductor stack; and multiple vias penetrating the active layer to expose the first semiconductor layer, wherein the first pad and the second pad are formed on regions other than the multiple vias.
    Type: Application
    Filed: April 15, 2019
    Publication date: August 8, 2019
    Inventors: Chao-Hsing CHEN, Jia-Kuen WANG, Tzu-Yao TSENG, Bo-Jiun HU, Tsung-Hsun CHIANG, Wen-Hung CHUANG, Kuan-Yi LEE, Yu-Ling LIN, Chien-Fu SHEN, Tsun-Kai KO
  • Patent number: 10374130
    Abstract: A light-emitting element comprises a substrate; a light-emitting semiconductor stack on the substrate, the 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 on the first semiconductor layer; a reflective layer formed on the light-emitting semiconductor stack; a protection layer formed on the light-emitting semiconductor stack; and a conductive contact layer formed on the light-emitting semiconductor stack, wherein each layer above the substrate comprises a side surface inclined to a top surface of the substrate.
    Type: Grant
    Filed: September 28, 2016
    Date of Patent: August 6, 2019
    Assignee: EPISTAR CORPORATION
    Inventors: Schang-Jing Hon, Chao-Hsing Chen, Tsun-Kai Ko, Chien-Fu Shen, Jia-Kuen Wang, Hung-Che Chen
  • Patent number: 10340431
    Abstract: This disclosure discloses a light-emitting device. The light-emitting device includes a light-emitting diode, a pad electrically connected to the active layer, a metal bump formed on the pad, and a reflective insulation layer. The metal bump has a first side surface and a first bottom surface, wherein the first bottom surface comprises a curved boundary, a longer axis, and a shorter axis. The reflective insulation layer is directly contacting the first side surface, and exposing the first bottom surface.
    Type: Grant
    Filed: January 10, 2018
    Date of Patent: July 2, 2019
    Assignee: EPISTAR CORPORATION
    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
  • Patent number: 10297723
    Abstract: A light-emitting device comprises a semiconductor stack comprising a first semiconductor layer, a second semiconductor layer, and an active layer formed between the first semiconductor layer and the second semiconductor layer; a first pad on the semiconductor stack; a second pad on the semiconductor stack, wherein the first pad and the second pad are separated from each other with a distance, which define a region between the first pad and the second pad on the semiconductor stack; and multiple vias penetrating the active layer to expose the first semiconductor layer, wherein the first pad and the second pad are formed on regions other than the multiple vias.
    Type: Grant
    Filed: April 9, 2018
    Date of Patent: May 21, 2019
    Assignee: EPISTAR CORPORATION
    Inventors: Chao-Hsing Chen, Jia-Kuen Wang, Tzu-Yao Tseng, Bo-Jiun Hu, Tsung-Hsun Chiang, Wen-Hung Chuang, Kuan-Yi Lee, Yu-Ling Lin, Chien-Fu Shen, Tsun-Kai Ko