Patents Examined by Salley C. Medley
  • Patent number: 5717560
    Abstract: A method and an apparatus protecting an integrated circuit from electrostatic discharge. In one embodiment, a method of coupling the gate of an ESD protection transistor high during an ESD event to ensure a more efficient protection device is described. The method uses static fixed parallel plate capacitances coupled to the gate of an ESD protection device to place the ESD protection device above threshold during an ESD event. The fixed parallel plate capacitances form capacitors between the gate-and-drain and gate-and-source of the ESD protection device resulting in static capacitive gate coupling which is more calculable and controllable. The ratios of the capacitances are set so as to bias the gate of the ESD protection device above threshold during an ESD event, thus allowing the ESD protection device to sink current during the ESD event.
    Type: Grant
    Filed: August 23, 1996
    Date of Patent: February 10, 1998
    Assignee: Intel Corporation
    Inventors: Brian S. Doyle, Timothy J. Maloney