Patents by Inventor Pak Kin Leung

Pak Kin Leung 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: 11776930
    Abstract: A die bond head apparatus has a die bond head body coupled to a die bond head motion table, a die holder motion table mounted on the die bond head body and a die holder which is operative in use to secure a semiconductor die to a substrate. The die holder is positionable by the die holder motion table independently of the die bond head motion table.
    Type: Grant
    Filed: December 16, 2019
    Date of Patent: October 3, 2023
    Assignee: ASMPT SINGAPORE PTE. LTD.
    Inventors: Chung Sheung Yung, Pak Kin Leung
  • Publication number: 20210183809
    Abstract: A die bond head apparatus has a die bond head body coupled to a die bond head motion table, a die holder motion table mounted on the die bond head body and a die holder which is operative in use to secure a semiconductor die to a substrate. The die holder is positionable by the die holder motion table independently of the die bond head motion table.
    Type: Application
    Filed: December 16, 2019
    Publication date: June 17, 2021
    Inventors: Chung Sheung YUNG, Pak Kin LEUNG
  • Patent number: 10622329
    Abstract: A cooling apparatus is provided for a bond head which has a collet to hold a semiconductor die and a heater to heat the semiconductor die held by the collet. The cooling apparatus includes a dielectric liquid supply for supplying a dielectric liquid and a gas supply for supplying a gas. A spray nozzle is located next to a surface of the heater, and is connected to both the dielectric liquid supply and the gas supply. In order to cool the heater, the spray nozzle sprays a liquid-gas mixture of the dielectric liquid and the gas towards the surface of the heater.
    Type: Grant
    Filed: October 27, 2014
    Date of Patent: April 14, 2020
    Assignee: ASM TECHNOLOGY SINGAPORE PTE LTD
    Inventors: Yi Kei Law, Pak Kin Leung, Chuek Wah Tang, Gary Peter Widdowson
  • Patent number: 10312214
    Abstract: An atomization mechanism for cooling a bond head comprises an atomization module and a conduit. In use, the atomization module receives gas and liquid from a gas supply and a liquid supply respectively to form an atomized spray and the conduit conveys the atomized spray from the atomization module to a spray inlet located at the bond head to receive the atomized spray into the bond head for cooling the bond head.
    Type: Grant
    Filed: September 8, 2016
    Date of Patent: June 4, 2019
    Assignee: ASM TECHNOLOGY SINGAPORE PTE LTD
    Inventors: Yi Kei Law, Chuek Wah Tang, Pak Kin Leung, Gary Peter Widdowson, Wing Chiu Lai, Kin Fung Yu, Jiang Wen Deng
  • Patent number: 10192847
    Abstract: A bond head comprises an insulation block, a heater plate attached to the insulation block and a collet located on the heater plate for holding a semiconductor device. The heater plate is operative to heat the semiconductor device that is held by the collet. A flow generation plate that is detachably mounted between the insulation block and the heater plate is configured to direct cooling gas from the insulation block onto the heater plate so as to rapidly cool the heater plate.
    Type: Grant
    Filed: June 12, 2014
    Date of Patent: January 29, 2019
    Assignee: ASM TECHNOLOGY SINGAPORE PTE LTD
    Inventors: Lu Ma, Cheuk Wah Tang, Pak Kin Leung
  • Publication number: 20180068973
    Abstract: An atomization mechanism for cooling a bond head comprises an atomization module and a conduit. In use, the atomization module receives gas and liquid from a gas supply and a liquid supply respectively to form an atomized spray and the conduit conveys the atomized spray from the atomization module to a spray inlet located at the bond head to receive the atomized spray into the bond head for cooling the bond head.
    Type: Application
    Filed: September 8, 2016
    Publication date: March 8, 2018
    Inventors: Yi Kei LAW, Chuek Wah TANG, Pak Kin LEUNG, Gary Peter WIDDOWSON, Wing Chiu LAI, Kin Fung YU, Jiang Wen DENG
  • Publication number: 20160116217
    Abstract: A cooling apparatus is provided for a bond head which has a collet adapted to hold a semiconductor die and a heater which is adapted to heat the semiconductor die held by the collet. The cooling apparatus comprises a dielectric liquid supply for supplying a dielectric liquid and a gas supply for supplying a gas. A spray nozzle is located next to a surface of the heater, and is operatively connected to both the dielectric liquid supply and the gas supply. In order to cool the heater, the spray nozzle is operative to spray a liquid-gas mixture comprising the dielectric liquid and the gas towards the surface of the heater.
    Type: Application
    Filed: October 27, 2014
    Publication date: April 28, 2016
    Inventors: Yi Kei LAW, Pak Kin LEUNG, Chuek Wah TANG, Gary Peter WIDDOWSON
  • Patent number: 9281290
    Abstract: A bond head for thermal compression die bonding comprises a collet operative to support a die on a first side of the collet during die bonding and a bond head heater located on a second side of the collet opposite to the first side for heating the collet and the die. A die vacuum suction hole on the bond head heater applies a vacuum suction force to hold the collet, and a collet vacuum suction hole on the bond head heater applies a vacuum suction force to hold the die. At least one vacuum distribution channel that is formed on the second side of the collet is in fluid communication with the collet vacuum suction hole and distributes the vacuum suction force across a surface of the second side of the collet for securing the collet.
    Type: Grant
    Filed: July 30, 2012
    Date of Patent: March 8, 2016
    Assignee: ASM TECHNOLOGY SINGAPORE PTE LTD
    Inventors: Kin Yik Hung, Pak Kin Leung, Cheuk Wah Tang, Chi Ping Hung, Gary Peter Widdowson
  • Publication number: 20150364440
    Abstract: A bond head comprises an insulation block, a heater plate attached to the insulation block and a collet located on the heater plate for holding a semiconductor device. The heater plate is operative to heat the semiconductor device that is held by the collet. A flow generation plate that is detachably mounted between the insulation block and the heater plate is configured to direct cooling gas from the insulation block onto the heater plate so as to rapidly cool the heater plate.
    Type: Application
    Filed: June 12, 2014
    Publication date: December 17, 2015
    Inventors: Lu MA, Cheuk Wah TANG, Pak Kin LEUNG
  • Publication number: 20140027068
    Abstract: A bond head for thermal compression die bonding comprises a collet operative to support a die on a first side of the collet during die bonding and a bond head heater located on a second side of the collet opposite to the first side for heating the collet and the die. A die vacuum suction hole on the bond head heater applies a vacuum suction force to hold the collet, and a collet vacuum suction hole on the bond head heater applies a vacuum suction force to hold the die. At least one vacuum distribution channel that is formed on the second side of the collet is in fluid communication with the collet vacuum suction hole and distributes the vacuum suction force across a surface of the second side of the collet for securing the collet.
    Type: Application
    Filed: July 30, 2012
    Publication date: January 30, 2014
    Inventors: Kin Yik HUNG, Pak Kin LEUNG, Cheuk Wah TANG, Chi Ping HUNG, Gary Peter WIDDOWSON
  • Patent number: 7667355
    Abstract: A linear motor comprising a coil assembly and a magnet assembly is provided with a cooling apparatus which comprises a segmented air knife assembly. The segmented air knife assembly has a plurality of slot openings distributed along its length which is coupled to the linear motor and it is operative to discharge cooling air into a gap between the coil assembly and magnet assembly in a discharge direction. An inclined surface extends from the plurality of slot openings and slopes at an obtuse angle away from the discharge direction of the cooling air. Each slot opening is individually configured to discharge the cooling air in the discharge direction at a sufficient velocity so as to entrain atmospheric air along the inclined surface to amplify the cooling air that is so discharged.
    Type: Grant
    Filed: January 4, 2008
    Date of Patent: February 23, 2010
    Assignee: ASM Assembly Automation Ltd.
    Inventors: Yuk Cheung Au, Kin Yik Hung, Wing Chiu Derek Lai, Pak Kin Leung, Cheuk Wah Chester Tang, Wai Lam
  • Publication number: 20090195088
    Abstract: A linear motor comprising a coil assembly and a magnet assembly is provided with a cooling apparatus which comprises a segmented air knife assembly. The segmented air knife assembly has a plurality of slot openings distributed along its length which is coupled to the linear motor and it is operative to discharge cooling air into a gap between the coil assembly and magnet assembly in a discharge direction. An inclined surface extends from the plurality of slot openings and slopes at an obtuse angle away from the discharge direction of the cooling air. Each slot opening is individually configured to discharge the cooling air in the discharge direction at a sufficient velocity so as to entrain atmospheric air along the inclined surface to amplify the cooling air that is so discharged.
    Type: Application
    Filed: January 4, 2008
    Publication date: August 6, 2009
    Inventors: Yuk Cheung AU, Kin Yik HUNG, Wing Chiu Derek LAI, Pak Kin LEUNG, Cheuk Wah Chester TANG, Wai LAM