Patents by Inventor Cho Wai LEUNG

Cho Wai 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: 11618231
    Abstract: A semiconductor device is located between a first die-set part and a second die-set part of a press, and the first and second die-set parts are moved relative to each other for punching and shaping the semiconductor device therebetween. At least one parameter is monitored with at least one sensor attached to the first die-set part and/or the second die-set part at different positions of the first die-set part when it is moving relative to the second die-set part. Variations of the at least one parameter at different relative positions of the first and second die-set parts are compared, and a failure is determined to have occurred when the present variation of the parameter is different from its expected variation during normal operation of the press when there is no failure.
    Type: Grant
    Filed: August 9, 2018
    Date of Patent: April 4, 2023
    Assignee: ASMPT SINGAPORE PTE, LTD.
    Inventors: Kwok Pun Law, Hong Yeung Li, Cho Wai Leung
  • Publication number: 20200047442
    Abstract: An apparatus and a method for detecting a failure in a press for punching semiconductor devices are provided, where the method comprises the steps of locating a semiconductor device between a first die-set part and a second die-set part comprised in the press, and moving the first die-set part and the second die-set part relative to each other for punching the semiconductor device therebetween.
    Type: Application
    Filed: August 9, 2018
    Publication date: February 13, 2020
    Inventors: Kwok Pun LAW, Hong Yeung LI, Cho Wai LEUNG
  • Patent number: 9387991
    Abstract: An apparatus for arranging integrated circuit receiving tubes, the apparatus including a reverse mechanism, a detection element and a discharge mechanism. In use, the reverse mechanism receives a tube and the detection element determines an orientation of the received tube. The reverse mechanism moves to allow the discharge mechanism to receive the tube from itself. If the orientation of the received tube differs from a desired orientation, the movement of the reverse mechanism changes the orientation of the tube before allowing the discharge mechanism to receive the tube. Otherwise, the orientation of the tube is maintained notwithstanding the movement of the reverse mechanism, and is subsequently received by the discharge mechanism. This helps to automatically ensure that all the tubes are received by the discharge mechanism in the same orientation.
    Type: Grant
    Filed: October 10, 2014
    Date of Patent: July 12, 2016
    Assignee: ASM TECHNOLOGY SINGAPORE PTE LTD
    Inventors: Wang Lung Tse, Chun Shing Wong, Cho Wai Leung, Ka Wing Yeung
  • Publication number: 20160101945
    Abstract: The present invention relates to an apparatus for arranging integrated circuit receiving tubes. The apparatus comprises a reverse mechanism, a detection element and a discharge mechanism. In use, the reverse mechanism receives a tube and the detection element determines an orientation of the received tube. The reverse mechanism moves to allow the discharge mechanism to receive the tube from itself. If the orientation of the received tube differs from a desired orientation, the movement of the reverse mechanism changes the orientation of the tube before allowing the discharge mechanism to receive the tube. Otherwise, the orientation of the tube is maintained notwithstanding the movement of the reverse mechanism, and is subsequently received by the discharge mechanism. This helps to automatically ensure that all the tubes are received by the discharge mechanism in the same orientation.
    Type: Application
    Filed: October 10, 2014
    Publication date: April 14, 2016
    Inventors: Wang Lung TSE, Chun Shing WONG, Cho Wai LEUNG, Ka Wing YEUNG
  • Patent number: 9193525
    Abstract: An apparatus for handling electronic components on a lead frame. The apparatus including a singulation device configured to singulate the lead frame to thereby separate the electronic components and to position the separated electronic components alternately into at least two layers along different levels; and a guide having a plurality of lanes running along a surface of the guide, the lanes being configured to transport the separated electronic components from a first end of the guide arranged adjacent to the singulation device to a second end of the guide arranged adjacent to an output area. The lanes at the first end of the guide are alternately arranged into at least two layers having respective levels to receive the electronic components from the singulation device, whereas the lanes at the second end of the guide are arranged into a single layer along a common level for transferring the electronic components to the output area.
    Type: Grant
    Filed: March 12, 2014
    Date of Patent: November 24, 2015
    Assignee: ASM TECHNOLOGY SINGAPORE PTE LTD
    Inventors: Wang Lung Tse, Chun Shing Wong, Ka Wing Yeung, Cho Wai Leung
  • Publication number: 20150259143
    Abstract: Disclosed is an apparatus for handling electronic components on a lead frame. The apparatus comprises a singulation device configured to singulate the lead frame to thereby separate the electronic components and to position the separated electronic components alternately into at least two layers along different levels; and a guide having a plurality of lanes running along a surface of the guide, the lanes being configured to transport the separated electronic components from a first end of the guide arranged adjacent to the singulation device to a second end of the guide arranged adjacent to an output area. The lanes at the first end of the guide are alternately arranged into at least two layers having respective levels to receive the electronic components from the singulation device, whereas the lanes at the second end of the guide are arranged into a single layer along a common level for transferring the electronic components to the output area. Also disclosed is a guide suitable for use with the apparatus.
    Type: Application
    Filed: March 12, 2014
    Publication date: September 17, 2015
    Inventors: Wang Lung TSE, Chun Shing WONG, Ka Wing YEUNG, Cho Wai LEUNG