Patents by Inventor Chunkau Leung

Chunkau 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).

  • Process for testing a head stack assembly
    Patent number: 7694410
    Abstract: A new fixture which is capable of holding an HAS throughout all processes so that Quasi-Static Test can be done before swaging. Also, a process for testing the HAS by means of the fixture. An embodiment method may include loading head gimbal assemblies and an actuator using an automatic loading machine; in-line dressing of the head gimbal assemblies; ultrasonic bonding of the head gimbal assemblies; testing said head gimbal assemblies in-line while quasi-static; and if an head gimbal assemblies fails to pass the testing, rejecting and reworking in-line; in-line coating of the head gimbal assemblies; ultra-violet curing of the head gimbal assemblies; in-line swaging said head gimbal assemblies and actuator to form an head stack assemblies; and visual checking and unloading of said head stack assemblies.
    Type: Grant
    Filed: November 24, 2004
    Date of Patent: April 13, 2010
    Assignee: SAE Magnetics (H.K.) Ltd.
    Inventors: Takehiro Kamigama, Huegung Wang, Yiusing Ho, Chunkau Leung, Waikong Cheung, Shinji Misawa, Jinsuo Sun, Wenxin Chang
  • Universal fixture for HSA assembly and its testing process
    Publication number: 20050091835
    Abstract: A new fixture which is capable of holding an HSA throughout all processes is invented so that Quasi-Static Test can be done before swaging. Handling operations are reduced and rework is made much easier. The invention further provides a process for testing the HSA by means of the fixture.
    Type: Application
    Filed: November 24, 2004
    Publication date: May 5, 2005
    Inventors: Takehiro Kamigama, Huegung Wang, Yiusing Ho, Chunkau Leung, Waikong Cheung, Shinji Misawa, Jinsuo Sun, Wenxin Chang
  • Universal fixture for HSA assembly and its testing process
    Patent number: 6859995
    Abstract: A new fixture which is capable of holding an HSA throughout all processes is invented so that Quasi-Static Test can be done before swaging. Handling operations are reduced and rework is made much easier. The invention further provides a process for testing the HSA by means of the fixture.
    Type: Grant
    Filed: November 13, 2002
    Date of Patent: March 1, 2005
    Assignee: Sae Magnetics (H.K.) Ltd.
    Inventors: Takehiro Kamigama, Huegung Wang, Yiusing Ho, Chunkau Leung, Waikong Cheung, Shinji Misawa, Jinsuo Sun, Wenxin Chang
  • Universal fixture for HSA assembly and its testing process
    Publication number: 20030151876
    Abstract: A new fixture which is capable of holding an HSA throughout all processes is invented so that Quasi-Static Test can be done before swaging. Handling operations are reduced and rework is made much easier. The invention further provides a process for testing the HSA by means of the fixture.
    Type: Application
    Filed: November 13, 2002
    Publication date: August 14, 2003
    Inventors: Takehiro Kamigama, Huegung Wang, Yiusing Ho, Chunkau Leung, Waikong Cheung, Shinji Misawa, Jinsuo Sun, Wenxin Chang