Patents by Inventor Wai Yuen Cheung

Wai Yuen Cheung 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: 10882298
    Abstract: A bonding apparatus comprises a movable bond head collet, a reference marker configured to move with the bond head collet, a flip head collet, first and second imaging devices and an adjusting mechanism. In use, the first imaging device captures one or more images of the reference marker and the flip head collet, and the second imaging device captures one or more images of the reference marker and the bond head collet. The adjusting mechanism aligns a position of the bond head collet with a position of the flip head collet based on an offset that is determined from the images of the flip head collet, bond head collet and reference marker. The flip head collet retrieves an electrical component and transfers the electrical component to the bond head collet at the alignment position.
    Type: Grant
    Filed: November 7, 2016
    Date of Patent: January 5, 2021
    Assignee: ASM TECHNOLOGY SINGAPORE PTE LTD
    Inventors: Shui Cheung Woo, Liang Hong Tang, Wan Yin Yau, Wai Yuen Cheung, Kui Kam Lam
  • Publication number: 20180126718
    Abstract: A bonding apparatus comprises a movable bond head collet, a reference marker configured to move with the bond head collet, a flip head collet, first and second imaging devices and an adjusting mechanism. In use, the first imaging device captures one or more images of the reference marker and the flip head collet, and the second imaging device captures one or more images of the reference marker and the bond head collet. The adjusting mechanism aligns a position of the bond head collet with a position of the flip head collet based on an offset that is determined from the images of the flip head collet, bond head collet and reference marker. The flip head collet retrieves an electrical component and transfers the electrical component to the bond head collet at the alignment position.
    Type: Application
    Filed: November 7, 2016
    Publication date: May 10, 2018
    Inventors: Shui Cheung WOO, Liang Hong TANG, Wan Yin YAU, Wai Yuen CHEUNG, Kui Kam LAM
  • Patent number: 8590143
    Abstract: An apparatus 200 for delivering semiconductor components 212 to a substrate 206a; 206b; 500a; 500b; 500c during semiconductor package manufacturing. The apparatus 200 comprises a platform 216 and a plurality of delivery modules 202a, 202b affixed to the platform 216. Each of the plurality of delivery modules 202a, 202b has a support device 204a; 204b for supporting the substrate 206a; 206b; 500a; 500b; 500c, as well as a delivery device 208a; 208b for delivering the semiconductor components 212 to the substrate 206a; 206b; 500a; 500b; 500c. In particular, heights of the support devices 204a, 204 are mutually leveled for conveying the substrate 206a; 206b; 500a; 500b; 500c between the plurality of delivery modules 202a, 202b.
    Type: Grant
    Filed: May 25, 2011
    Date of Patent: November 26, 2013
    Assignee: ASM Technology Singapore Pte. Ltd.
    Inventors: Kui Kam Lam, Yen Hsi Tang, Wai Yuen Cheung, Wing Kin Lam
  • Publication number: 20120301251
    Abstract: An apparatus 200 for delivering semiconductor components 212 to a substrate 206a; 206b; 500a; 500b; 500c during semiconductor package manufacturing is disclosed. The apparatus 200 comprises a platform 216 and a plurality of delivery modules 202a, 202b affixed to the platform 216. Each of the plurality of delivery modules 202a, 202b has a support device 204a; 204b for supporting the substrate 206a; 206b; 500a; 500b; 500c, as well as a delivery device 208a; 208b for delivering the semiconductor components 212 to the substrate 206a; 206b; 500a; 500b; 500c. In particular, heights of the support devices 204a, 204 are mutually levelled for conveying the substrate 206a; 206b; 500a; 500b; 500c between the plurality of delivery modules 202a, 202b.
    Type: Application
    Filed: May 25, 2011
    Publication date: November 29, 2012
    Applicant: ASM TECHNOLOGY SINGAPORE PTE. LTD.
    Inventors: Kui Kam LAM, Yen Hsi Tang, Wai Yuen Cheung, Wing Kin Lam
  • Patent number: 8293043
    Abstract: A die bonding apparatus and method is provided to automatically adjust a level of a die bonder to compensate for any physical changes occurring in the die bonder during bonding. A bond arm support is drivable to a bonding level to position a die onto a bonding surface, and a bond arm is slidably mounted to the bond arm support for holding and bonding the die. The bond arm is configured to be urged by the bonding surface to move relative to the bond arm support upon contact of the die onto the bonding surface. A measuring device is provided for determining a distance moved by the bond arm relative to the bond arm support during bonding, and a controller is responsive to the distance determined by the measuring device to change the bonding level to which the bond arm support is driven.
    Type: Grant
    Filed: July 24, 2006
    Date of Patent: October 23, 2012
    Assignee: ASM Assembly Automation Ltd
    Inventors: Kwok Kee Chung, Kui Kam Lam, Chi Keung Leung, Wai Yuen Cheung
  • Publication number: 20080017293
    Abstract: A die bonding apparatus and method is provided to automatically adjust a level of a die bonder to compensate for any physical changes occurring in the die bonder during bonding. A bond arm support is drivable to a bonding level to position a die onto a bonding surface, and a bond arm is slidably mounted to the bond arm support for holding and bonding the die. The bond arm is configured to be urged by the bonding surface to move relative to the bond arm support upon contact of the die onto the bonding surface. A measuring device is provided for determining a distance moved by the bond arm relative to the bond arm support during bonding, and a controller is responsive to the distance determined by the measuring device to change the bonding level to which the bond arm support is driven.
    Type: Application
    Filed: July 24, 2006
    Publication date: January 24, 2008
    Inventors: Kwok Kee Chung, Kui Kam Lam, Chi Keung Leung, Wai Yuen Cheung
  • Patent number: 6991967
    Abstract: The invention provides an apparatus for die attachment onto a substrate including non-metallic material, and metallic material that is adapted to receive a die having a eutectic coating. A heating conduit is provided through which the substrate is movable for heating the metallic material to a eutectic bonding temperature to facilitate bonding between the die and the metallic material at a die-attach position. An induction heating device at the die-attach position heats the metallic material of the substrate to the eutectic bonding temperature prior to attaching a die onto the metallic material.
    Type: Grant
    Filed: February 23, 2004
    Date of Patent: January 31, 2006
    Assignee: ASM Assembly Automation Ltd.
    Inventors: Deming Liu, Ran Fu, Kui Kam Lam, Man Chung Raymond Ng, Wai Yuen Cheung