Patents by Inventor Shenchu Zhang

Shenchu 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).

  • Cleaning system for very small semiconductor spherical-shaped objects
    Patent number: 6235126
    Abstract: A system and method for cleaning very small spherical shaped semiconductor devices is disclosed. The system includes an enclosure for housing a pair of rollers. The enclosure also includes a fluid inlet for receiving a cleaning agent and a product inlet for receiving the spherical shaped semiconductor device. A motor rotates one or both of the rollers. In operation, the spherical shaped semiconductor device and the cleaning agent are provided into the enclosure. The device passes to the pair of rollers and is cleaned by the cleaning agent and the rotating rollers. Once cleaned, the spherical shaped device and cleaning agent pass into a separator and the device is fully cleaned.
    Type: Grant
    Filed: February 2, 1999
    Date of Patent: May 22, 2001
    Assignee: Ball Semiconductor, Inc.
    Inventor: Shenchu Zhang