Patents by Inventor In Chang Hwang

In Chang Hwang 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).

  • Patent number: 9841841
    Abstract: A touch controller includes a driving signal transmitter and a sensing signal receiver. The driving signal transmitter is configured to generate a driving signal by spreading a frequency of an input signal to a first frequency and a second frequency. The first frequency is higher than a preset carrier frequency and the second frequency is less than the carrier frequency. The driving signal transmitter inputs the driving signal to a touch panel. The sensing signal receiver is configured to receive a sensing signal generated in the touch panel based on the driving signal and generate touch data based on the sensing signal.
    Type: Grant
    Filed: December 22, 2015
    Date of Patent: December 12, 2017
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventor: Hee-Chang Hwang
  • Publication number: 20170330843
    Abstract: An advanced moisture resistant structure of compound semiconductor integrated circuit comprises a compound semiconductor substrate, a compound semiconductor epitaxial structure, a compound semiconductor integrated circuit and a moisture barrier layer. The compound semiconductor epitaxial structure is formed on the compound semiconductor substrate. The compound semiconductor integrated circuit is foimed on the compound semiconductor epitaxial structure. The moisture barrier layer is formed on the compound semiconductor integrated circuit. The moisture barrier layer is made of A12O3. The thickness of the moisture barrier layer is greater than or equal to 400 ? and less than or equal to 1000 ? so as to enhance the moisture resistant ability of the compound semiconductor integrated circuit.
    Type: Application
    Filed: August 22, 2016
    Publication date: November 16, 2017
    Inventors: Chang Hwang Hua, Winson Shao
  • Publication number: 20170222011
    Abstract: An improved gate metal structure for compound semiconductor devices comprises sequentially a compound semiconductor substrate, a Schottky barrier layer, an insulating layer and a gate metal. The insulating layer has a gate recess. The surrounding and the bottom of the gate recess are defined by the insulating layer and the Schottky barrier layer respectively. The gate metal includes a contact layer formed on the insulating layer, covering the gate recess and contacted with the Schottky barrier layer at the bottom of the gate recess; a first diffusion barrier layer formed on the contact layer; a second diffusion barrier layer formed on the first diffusion barrier layer; and a conduct layer formed on the second diffusion barrier layer. Thereby the reliability of the compound semiconductor devices is enhanced.
    Type: Application
    Filed: April 26, 2016
    Publication date: August 3, 2017
    Inventors: Chang-Hwang HUA, Kai-Sin CHO, Walter Tony WOHLMUTH
  • Patent number: 9704829
    Abstract: A stacked structure comprises a semiconductor chip which includes a substrate having at least one substrate via hole penetrating through the substrate; at least one backside metal layer formed on a backside of the substrate covering an inner surface of the substrate via hole and at least part of the backside of the substrate; at least one front-side metal layer formed on the front-side of the substrate and electrically connected to the at least one backside metal layer on a top of at least one of the at least one substrate via hole; at least one electronic device formed on the front-side of the substrate and electrically connected to the at least one front-side metal layer; and at least one metal bump formed on at least one of the backside metal layer and the front-side metal layer.
    Type: Grant
    Filed: October 14, 2015
    Date of Patent: July 11, 2017
    Assignee: Win Semiconductor Corp.
    Inventors: Chang-Hwang Hua, Chih-Hsien Lin
  • Publication number: 20170194451
    Abstract: A Schottky barrier semiconductor device having a nanoscale film interface comprises a Schottky barrier layer and a metal electrode; wherein a nanoscale film interface layer is formed on a top surface of the Schottky barrier layer, a thickness of the nanoscale film interface layer is greater than 3 ? and smaller than 20 ?, the nanoscale film interface layer is made of at least one oxide; the metal electrode is formed on the nanoscale film interface layer and contacted with the nanoscale film interface layer.
    Type: Application
    Filed: April 26, 2016
    Publication date: July 6, 2017
    Inventors: Chang-Hwang HUA, Winson SHAO
  • Patent number: 9673186
    Abstract: The present invention relates to a compound semiconductor integrated circuit chip having a front and/or back surface metal layer used for electrical connection to an external circuit. The compound semiconductor integrated circuit chip (first chip) comprises a substrate, an electronic device layer, and a dielectric layer. A first metal layer is formed on the front side of the dielectric layer, and a third metal layer is formed on the back side of the substrate. The first and third metal layer are made essentially of Cu and used for the connection to other electronic circuits. A second chip may be mounted on the first chip with electrical connection made with the first or the third metal layer that extends over the electronic device in the first chip in the three-dimensional manner to make the electrical connection between the two chips having connection nodes away from each other.
    Type: Grant
    Filed: March 31, 2015
    Date of Patent: June 6, 2017
    Assignee: WIN SEMICONDUCTORS CORP.
    Inventors: Shinichiro Takatani, Hsien-Fu Hsiao, Cheng-Kuo Lin, Chang-Hwang Hua
  • Publication number: 20170084592
    Abstract: The present invention relates to a compound semiconductor integrated circuit chip having a front and/or back surface metal layer used for electrical connection to an external circuit. The compound semiconductor integrated circuit chip (first chip) comprises a substrate, an electronic device layer, and a dielectric layer. A first metal layer is formed on the front side of the dielectric layer, and a third metal layer is formed on the back side of the substrate. The first and third metal layer are made essentially of Cu and used for the connection to other electronic circuits. A second chip may be mounted on the first chip with electrical connection made with the first or the third metal layer that extends over the electronic device in the first chip in the three-dimensional manner to make the electrical connection between the two chips having connection nodes away from each other.
    Type: Application
    Filed: December 6, 2016
    Publication date: March 23, 2017
    Inventors: Shinichiro TAKATANI, Hsien-Fu Hsiao, Cheng-Kuo LIN, Chang-Hwang HUA
  • Patent number: 9548276
    Abstract: An improved structure of backside copper metallization for semiconductor devices and a fabrication method thereof, wherein the improved structure comprises sequentially from top to bottom an active layer, a substrate, a backside metal seed layer, a high-temperature sustaining buffer layer, a backside metal layer and at least one oxidation resistant layer, wherein the backside metal seed layer contains Pd and P, the high-temperature sustaining buffer layer is made of Ni, Ag or Ni alloys, and the backside metal layer is made of Cu. The semiconductor chip using the structure provided by the present invention can sustain high-temperature operations.
    Type: Grant
    Filed: September 29, 2015
    Date of Patent: January 17, 2017
    Assignee: WIN SEMICONDUCTORS CORP.
    Inventors: Jason Chen, Chang-Hwang Hua, Wen Chu
  • Publication number: 20160202839
    Abstract: A touch controller includes a driving signal transmitter and a sensing signal receiver. The driving signal transmitter is configured to generate a driving signal by spreading a frequency of an input signal to a first frequency and a second frequency. The first frequency is higher than a preset carrier frequency and the second frequency is less than the carrier frequency. The driving signal transmitter inputs the driving signal to a touch panel. The sensing signal receiver is configured to receive a sensing signal generated in the touch panel based on the driving signal and generate touch data based on the sensing signal.
    Type: Application
    Filed: December 22, 2015
    Publication date: July 14, 2016
    Inventor: HEE-CHANG HWANG
  • Publication number: 20160159252
    Abstract: An apparatus for reclining a rear seat for a vehicle includes a cushion frame having a front end and a rear end, respectively, and rotatably mounted to a floor through a link. The cushion frame is connected to the floor via a motor driver to rotationally move forward as the motor driver operates. A back frame has a lower end rotatably mounted to the rear end of the cushion frame and an upper end having a connector connected to a vehicle body. A fastener is fixedly mounted to the vehicle body and adjacent to the upper end of the back frame. The fastener is rotatably connected to the connector.
    Type: Application
    Filed: March 24, 2015
    Publication date: June 9, 2016
    Inventors: Chan Ho JEONG, Sang Uk YU, Jung Sang YOU, Seon Chae NA, Myung Soo LEE, In Chang HWANG
  • Publication number: 20160035707
    Abstract: A stacked structure comprises a semiconductor chip which includes a substrate having at least one substrate via hole penetrating through the substrate; at least one backside metal layer formed on a backside of the substrate covering an inner surface of the substrate via hole and at least part of the backside of the substrate; at least one front-side metal layer formed on the front-side of the substrate and electrically connected to the at least one backside metal layer on a top of at least one of the at least one substrate via hole; at least one electronic device formed on the front-side of the substrate and electrically connected to the at least one front-side metal layer; and at least one metal bump formed on at least one of the backside metal layer and the front-side metal layer.
    Type: Application
    Filed: October 14, 2015
    Publication date: February 4, 2016
    Inventors: Chang-Hwang HUA, Chih-Hsien LIN
  • Publication number: 20160020178
    Abstract: An improved structure of backside copper metallization for semiconductor devices and a fabrication method thereof, wherein the improved structure comprises sequentially from top to bottom an active layer, a substrate, a backside metal seed layer, a high-temperature sustaining buffer layer, a backside metal layer and at least one oxidation resistant layer, wherein the backside metal seed layer contains Pd and P, the high-temperature sustaining buffer layer is made of Ni, Ag or Ni alloys, and the backside metal layer is made of Cu. The semiconductor chip using the structure provided by the present invention can sustain high-temperature operations.
    Type: Application
    Filed: September 29, 2015
    Publication date: January 21, 2016
    Inventors: JASON CHEN, CHANG-HWANG HUA, WEN CHU
  • Patent number: 9190374
    Abstract: A structure of a semiconductor chip with substrate via holes and metal bumps and a fabrication method thereof. The structure comprises a substrate, at least one backside metal layer, at least one first metal layer, at least one electronic device, and at least one metal bump. The substrate has at least one substrate via hole penetrating through the substrate. The at least one first metal layer and electronic device are formed on the front side of the substrate. The at least one metal bump is formed on the at least one first metal layer. The at least one backside metal layer is formed on the backside of the substrate covering the inner surface of the substrate via hole and at least part of the backside of the substrate and connected to the first metal layer on the top of the substrate via hole.
    Type: Grant
    Filed: August 16, 2013
    Date of Patent: November 17, 2015
    Assignee: WIN SEMICONDUCTORS CORP.
    Inventors: Chang-Hwang Hua, Chih-Hsien Lin
  • Publication number: 20150318342
    Abstract: A high breakdown voltage metal-insulator-metal capacitor for compound semiconductor integrated circuit comprises a substrate, an isolation layer, a first metal layer, a dielectric layer, an adhesion layer and a second metal layer. The dielectric layer is formed by alternately stacking plural HfO2 layers and plural SiO2 layers. The thickness of each layer of the plural HfO2 layers is between 30 ? to 100 ? so as to reduce the leakage current, enhance the breakdown voltage and increase the capacitance density of each layer of the plural HfO2 layers. And the total thickness of the dielectric layer is thicker than 500 ? such that the breakdown voltage of the capacitor is higher than 50V.
    Type: Application
    Filed: July 17, 2014
    Publication date: November 5, 2015
    Inventors: Chang-Hwang HUA, Winson SHAO, Ben HSU, Wen CHU
  • Patent number: 9178007
    Abstract: A high breakdown voltage metal-insulator-metal capacitor for compound semiconductor integrated circuit comprises a substrate, an isolation layer, a first metal layer, a dielectric layer, an adhesion layer and a second metal layer. The dielectric layer is formed by alternately stacking plural HfO2 layers and plural SiO2 layers. The thickness of each layer of the plural HfO2 layers is between 30 ? to 100 ? so as to reduce the leakage current, enhance the breakdown voltage and increase the capacitance density of each layer of the plural HfO2 layers. And the total thickness of the dielectric layer is thicker than 500 ? such that the breakdown voltage of the capacitor is higher than 50 V.
    Type: Grant
    Filed: July 17, 2014
    Date of Patent: November 3, 2015
    Assignee: WIN SEMICONDUCTORS CORP.
    Inventors: Chang-Hwang Hua, Winson Shao, Ben Hsu, Wen Chu
  • Publication number: 20150206870
    Abstract: The present invention relates to a compound semiconductor integrated circuit chip having a front and/or back surface metal layer used for electrical connection to an external circuit. The compound semiconductor integrated circuit chip (first chip) comprises a substrate, an electronic device layer, and a dielectric layer. A first metal layer is formed on the front side of the dielectric layer, and a third metal layer is formed on the back side of the substrate. The first and third metal layer are made essentially of Cu and used for the connection to other electronic circuits. A second chip may be mounted on the first chip with electrical connection made with the first or the third metal layer that extends over the electronic device in the first chip in the three-dimensional manner to make the electrical connection between the two chips having connection nodes away from each other.
    Type: Application
    Filed: March 31, 2015
    Publication date: July 23, 2015
    Inventors: Shinichiro TAKATANI, Hsien-Fu HSIAO, Cheng-Kuo LIN, Chang-Hwang HUA
  • Publication number: 20150162788
    Abstract: A rotor core assembly for a reluctance motor and a manufacturing method of the same, wherein the rotor core assembly has multiple silicon steel laminations and a nonmagnetic material. The silicon steel laminations are axially stacked, and each silicon steel lamination has multiple magnetic flux sections. Each magnetic flux section has multiple arcuate grooves and multiple salient poles. The arcuate grooves are concentrically arranged. The salient poles protrude into the grooves. The nonmagnetic material is disposed in the grooves, and is wrapped around the salient poles, which enables the silicon steel laminations to remain securely assembled together. The salient poles are disposed in the grooves to avoid ruining the magnetic line of force. As a result, the rotor core assembly can keep rigidity of the assembled silicon steel laminations, and can keep the integrity of the magnetic circuit.
    Type: Application
    Filed: December 2, 2014
    Publication date: June 11, 2015
    Inventors: Hsing-Chih TSAI, Hsin-Te WANG, Shou-Chang HWANG, Guang-Miao HUANG, Rong-Bin LIN, Ming-Hung CHIEN, Chih-Yuan YANG
  • Publication number: 20150138145
    Abstract: A touch screen controller, a touch screen system, and a display apparatus including the same includes a touch data generator that supplies a first transmission signal to a first sensing line, supplies a second transmission signal to a second sensing line adjacent to the first sensing line, receives differential touch signals from the first and second sensing lines, and performs an arithmetic operation on the differential touch signals to generate a single-ended touch signal, and a control logic that calculates touch coordinates by using the single-ended touch signal from the touch data generator. At least one of phases and frequencies of the first and second transmission signals have different values.
    Type: Application
    Filed: November 4, 2014
    Publication date: May 21, 2015
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Hee-chang Hwang, Yoon-kyung Choi, Ki-duk Kim, Jong-seon Kim, Jong-kang Park
  • Patent number: 8911551
    Abstract: An electroless plating apparatus and method designed specifically for plating at least one semiconductor wafer are disclosed. The apparatus comprises a container, a wafer holder, an electrolyte supplying unit, and an ultrasonic-vibration unit. The container is provided with at least an inlet and used for containing electrolyte. The wafer holder is provided within the container. The electrolyte supplying unit is used to supply the electrolyte into the container via the inlet. The ultrasonic-vibration unit consisting of at least one frequency ultrasonic transducer is disposed in the container for producing a uniform flow of electrolyte in the container. Thereby, the wafers can be uniformly plated, especially for wafers with fine via-holes or trench structures.
    Type: Grant
    Filed: August 2, 2011
    Date of Patent: December 16, 2014
    Assignee: Win Semiconductor Corp.
    Inventors: Jason Chen, Nakano Liu, Winson Shao, Wen Chu, Chang-Hwang Hua
  • Patent number: 8835283
    Abstract: A fabrication method for producing semiconductor chips with enhanced die strength comprises following steps: forming a semiconductor wafer with enhanced die strength by comprising the substrate, the active layer on the front side of the substrate and the backside metal layer on the backside of the substrate, wherein at least one integrated circuit forms in the active layer; forming a protection layer on a front side of the semiconductor wafer; dicing the semiconductor wafer by at least one laser dicing process and removing the laser dicing residues and removing said protection layer by at least one etching process, whereby plural semiconductor chips with enhanced die strength are produced, and wherein the backside metal layer of said semiconductor chip fully covers the backside of said semiconductor chip after dicing.
    Type: Grant
    Filed: August 20, 2013
    Date of Patent: September 16, 2014
    Assignee: WIN Semiconductors Corp.
    Inventor: Chang-Hwang Hua