Patents by Inventor Pan-kai Liu

Pan-kai Liu 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).

  • Semiconductor process recording apparatus
    Patent number: 6755933
    Abstract: A semiconductor process recording apparatus comprises a buffer circuit and a endpoint recording device. The input terminal of the buffer circuit is connected to an external endpoint apparatus for receiving a first signal output from the endpoint apparatus. The output terminal of the buffer circuit is connected to the endpoint recording device for outputting a second signal representative of the first signal in response to the first signal. When receiving the second signal, the endpoint recording device outputs a feedback signal to the buffer circuit on the basis of the second signal. Because the feedback signal is blocked by the buffer circuit, the external endpoint apparatus is protected from the damage caused by the feedback signal, thereby greatly reducing the production cost and rate of semiconductor manufacturing.
    Type: Grant
    Filed: April 19, 2002
    Date of Patent: June 29, 2004
    Assignee: Macronix International Co., Ltd.
    Inventors: Hung-hsiang Wang, Wei-chen Chen, Shuenn-chuan Yu, Pan-kai Liu, Andy Lin, Hsin-chen Liu
  • Semiconductor process recording apparatus
    Publication number: 20030196758
    Abstract: A semiconductor process recording apparatus comprises a buffer circuit and a endpoint recording device. The input terminal of the buffer circuit is connected to an external endpoint apparatus for receiving a first signal output from the endpoint apparatus. The output terminal of the buffer circuit is connected to the endpoint recording device for outputting a second signal representative of the first signal in response to the first signal. When receiving the second signal, the endpoint recording device outputs a feedback signal to the buffer circuit on the basis of the second signal. Because the feedback signal is blocked by the buffer circuit, the external endpoint apparatus is protected from the damage caused by the feedback signal, thereby greatly reducing the production cost and rate of semiconductor manufacturing.
    Type: Application
    Filed: April 19, 2002
    Publication date: October 23, 2003
    Inventors: Hung-Hsiang Wang, Wei-Chen Chen, Shuenn-Chuan Yu, Pan-Kai Liu, Andy Lin, Hsin-Chen Liu