Patents by Inventor Chein-Ming Lee

Chein-Ming Lee 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).

  • ESD protection unit with ability to enhance trigger-on speed of low voltage triggered PNP
    Patent number: 7242561
    Abstract: The invention relates to an ESD protection with ability to enhance trigger-on speed of a low voltage Triggered PNP (LVTPNP) unit for protecting internal circuits of an integrated circuit from attack of an ESD stress. The ESD protection unit incorporates either detection circuit or power clamp circuit to efficiently trigger on a trigger node as a heavily doped region of LVTPNP devices among an I/O pad, a VDD pin and a VSS pin. As soon as the trigger node of each LVTPNP device receives a trigger signal from either the ESD detection circuit or power clamp circuit, the threshold voltage of the LVTPNP devices are capable of being therefore reduced to enhance trigger-on speed of the LVTPNP devices that discharge ESD current.
    Type: Grant
    Filed: January 12, 2005
    Date of Patent: July 10, 2007
    Assignee: Silicon Integrated System Corp.
    Inventors: Ming-Dou Ker, Chein-Ming Lee
  • ESD protection unit with ability to enhance trigger-on speed of low voltage triggered PNP
    Publication number: 20060152868
    Abstract: The invention relates to an ESD protection with ability to enhance trigger-on speed of a low voltage Triggered PNP (LVTPNP) unit for protecting internal circuits of an integrated circuit from attack of an ESD stress. The ESD protection unit incorporates either detection circuit or power clamp circuit to efficiently trigger on a trigger node as a heavily doped region of LVTPNP devices among an I/O pad, a VDD pin and a VSS pin. As soon as the trigger node of each LVTPNP device receives a trigger signal from either the ESD detection circuit or power clamp circuit, the threshold voltage of the LVTPNP devices are capable of being therefore reduced to enhance trigger-on speed of the LVTPNP devices that discharge ESD current.
    Type: Application
    Filed: January 12, 2005
    Publication date: July 13, 2006
    Inventors: Ming-Dou Ker, Chein-Ming Lee