Patents by Inventor KeenYip Koh

KeenYip Koh 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).

  • Photoresist delivery system including control valve and associated methods
    Patent number: 9091924
    Abstract: A photoresist delivery system includes a photoresist pump, a photoresist reservoir coupled to the photoresist pump, and a photoresist container. A control valve is between the photoresist reservoir and the photoresist container and is movable from a closed position to an open position upon engagement of the photoresist container with the photoresist reservoir to replenish photoresist therein.
    Type: Grant
    Filed: September 24, 2012
    Date of Patent: July 28, 2015
    Assignee: STMICROELECTRONICS PTE LTD
    Inventors: Gino George, KeenYip Koh, CheeChiang Lee, Ditto Adnan
  • PHOTORESIST DELIVERY SYSTEM INCLUDING CONTROL VALVE AND ASSOCIATED METHODS
    Publication number: 20140083557
    Abstract: A photoresist delivery system includes a photoresist pump, a photoresist reservoir coupled to the photoresist pump, and a photoresist container. A control valve is between the photoresist reservoir and the photoresist container and is movable from a closed position to an open position upon engagement of the photoresist container with the photoresist reservoir to replenish photoresist therein.
    Type: Application
    Filed: September 24, 2012
    Publication date: March 27, 2014
    Applicant: STMicroelectronics Pte Ltd.
    Inventors: Gino GEORGE, KeenYip Koh, CheeChiang LEE, Ditto ADNAN