Patents by Inventor Yiju Zhang

Yiju Zhang 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).

  • Chemical-enhanced package singulation process
    Patent number: 7553700
    Abstract: Singulation of individual electronic packages fabricated as part of a common matrix, is accomplished by mask patterning and chemical exposure in combination with physical sawing. In one embodiment of a singulation process in accordance with the present invention, an initial, shallow saw cut into inter-package regions of the matrix exposes underlying metal to subsequent chemical etching steps. In an alternative embodiment, a separate photoresist mask may be patterned over the matrix to selectively expose metal in inter-package regions to chemical etching.
    Type: Grant
    Filed: May 11, 2004
    Date of Patent: June 30, 2009
    Assignee: GEM Services, Inc.
    Inventors: Hamza Yilmaz, Anthony Chia, Xiaoguang Zeng, Wong Hie Ming, Liming Wang, Yiju Zhang
  • Chemical-enhanced package singulation process
    Publication number: 20050255634
    Abstract: Singulation of individual electronic packages fabricated as part of a common matrix, is accomplished by mask patterning and chemical exposure in combination with physical sawing. In one embodiment of a singulation process in accordance with the present invention, an initial, shallow saw cut into inter-package regions of the matrix exposes underlying metal to subsequent chemical etching steps. In an alternative embodiment, a separate photoresist mask may be patterned over the matrix to selectively expose metal in inter-package regions to chemical etching.
    Type: Application
    Filed: May 11, 2004
    Publication date: November 17, 2005
    Applicant: GEM Services, Inc.
    Inventors: Hamza Yilmaz, Anthony Chia, Xiaoguang Zeng, Wong Ming, Liming Wang, Yiju Zhang