Patents by Inventor Richard J. K. Hong

Richard J. K. Hong 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).

  • Patent number: 10134728
    Abstract: An integrated circuit may include a plurality of input/output (I/O) cells used for communicating signals, power, and ground to and from a core of the integrated circuit. The I/O cells may each include a bond pad formed in one or more top metal layers. One or more of the bond pads may be offset a predetermined distance from an I/O cell edge corresponding to a chip edge of the integrated circuit. A volume may be determined by the I/O cell edge and the predetermined distance and one or more rails may be disposed in the volume and in at least one metal layer common with at least one metal layer of the bond pad. The rails may be involved in the discharge of electrostatic discharge (ESD) current, and may reduce path resistance of the path used to discharge the ESD current.
    Type: Grant
    Filed: March 31, 2016
    Date of Patent: November 20, 2018
    Assignee: SanDisk Technologies LLC
    Inventors: Shiv Harit Mathur, Anand Sharma, Lakhdar Iguelmamene, Richard J K Hong, Rajeswara Rao Bandaru
  • Patent number: 8520351
    Abstract: Methods of the invention include an electrostatic discharge (ESD) protection method capable of detecting a slew rate of an input signal and capable of determining whether the slew rate of the input signal is greater than a threshold value. For an ESD event having a slew rate in excess of the threshold value said method generates a trigger signal which generates an activation signal that activates the ESD dissipation circuitry and that controls the length of time the dissipation circuit remains active. The method further comprises shunting the ESD energy away from a protected internal circuit. The method maintaining the shunting of the energy for a period of time sufficient to discharge of the ESD energy without damaging the protected circuitry.
    Type: Grant
    Filed: January 10, 2012
    Date of Patent: August 27, 2013
    Assignee: Sandisk Technologies Inc.
    Inventor: Richard J. K. Hong
  • Publication number: 20120127618
    Abstract: Methods of the invention include an electrostatic discharge (ESD) protection method capable of detecting a slew rate of an input signal and capable of determining whether the slew rate of the input signal is greater than a threshold value. For an ESD event having a slew rate in excess of the threshold value said method generates a trigger signal which generates an activation signal that activates the ESD dissipation circuitry and that controls the length of time the dissipation circuit remains active. The method further comprises shunting the ESD energy away from a protected internal circuit. The method maintaining the shunting of the energy for a period of time sufficient to discharge of the ESD energy without damaging the protected circuitry.
    Type: Application
    Filed: January 10, 2012
    Publication date: May 24, 2012
    Applicant: SANDISK TECHNOLOGIES INC.
    Inventor: Richard J.K. HONG
  • Patent number: 8116047
    Abstract: Methods and devices of the invention include an electrostatic discharge (ESD) protection circuit. This circuit includes rise time dependent activation circuitry capable of detecting a slew rate of an input signal and capable of determining whether the slew rate of the input signal is greater than a threshold value. For an ESD event said activation circuitry generates a trigger signal. Additionally, the activation circuitry is coupled with the ESD dissipation duration control circuitry which is further coupled with an ESD dissipation circuit. This arrangement enabling the duration control circuit to be activated by the trigger signal which responds by producing an activation signal that activates the ESD dissipation circuitry and that controls the length of time the dissipation circuit remains active. The ESD dissipation circuitry includes a shunt that redirects the ESD energy away from the protected internal circuit.
    Type: Grant
    Filed: December 18, 2008
    Date of Patent: February 14, 2012
    Assignee: SanDisk Technologies Inc.
    Inventor: Richard J. K. Hong
  • Publication number: 20100157491
    Abstract: Methods and devices of the invention include an electrostatic discharge (ESD) protection circuit. This circuit includes rise time dependent activation circuitry capable of detecting a slew rate of an input signal and capable of determining whether the slew rate of the input signal is greater than a threshold value. For an ESD event said activation circuitry generates a trigger signal. Additionally, the activation circuitry is coupled with the ESD dissipation duration control circuitry which is further coupled with an ESD dissipation circuit. This arrangement enabling the duration control circuit to be activated by the trigger signal which responds by producing an activation signal that activates the ESD dissipation circuitry and that controls the length of time the dissipation circuit remains active. The ESD dissipation circuitry includes a shunt that redirects the ESD energy away from the protected internal circuit.
    Type: Application
    Filed: December 18, 2008
    Publication date: June 24, 2010
    Applicant: SANDISK CORP.
    Inventor: Richard J.K. HONG