Patents by Inventor Richard P. Smith

Richard P. Smith 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: 9142636
    Abstract: A III-Nitride field-effect transistor, specifically a HEMT, comprises a channel layer, a barrier layer on the channel layer, an etch stop layer on the cap layer, a dielectric layer on the etch stop layer, a gate recess that extends to the barrier layer, and a gate contact in the gate recess. The etch stop layer may reduce damage associated with forming the recessed gate by not exposing the barrier layer to dry etching. The etch stop layer in the recess is removed and the remaining etch stop layer serves as a passivation layer.
    Type: Grant
    Filed: May 13, 2013
    Date of Patent: September 22, 2015
    Assignee: Cree, Inc.
    Inventors: Scott T. Sheppard, Andrew K. Mackenzie, Scott T. Allen, Richard P. Smith
  • Publication number: 20130252386
    Abstract: A III-Nitride field-effect transistor, specifically a HEMT, comprises a channel layer, a barrier layer on the channel layer, an etch stop layer on the cap layer, a dielectric layer on the etch stop layer, a gate recess that extends to the barrier layer, and a gate contact in the gate recess. The etch stop layer may reduce damage associated with forming the recessed gate by not exposing the barrier layer to dry etching. The etch stop layer in the recess is removed and the remaining etch stop layer serves as a passivation layer.
    Type: Application
    Filed: May 13, 2013
    Publication date: September 26, 2013
    Applicant: Cree, Inc.
    Inventors: Scott T. Sheppard, Andrew K. Mackenzie, Scott T. Allen, Richard P. Smith
  • Patent number: 7855401
    Abstract: An improved field effect transistor formed in the Group III nitride material system includes a two part structure in which a chemical vapor deposited passivation layer of silicon nitride encapsulates a previously sputtered-deposited layer of silicon nitride. The sputtered layer provides some of the benefits of passivation and the chemical vapor deposited layer provides an excellent environmental barrier.
    Type: Grant
    Filed: August 28, 2007
    Date of Patent: December 21, 2010
    Assignee: Cree, Inc.
    Inventors: Scott T. Sheppard, Richard P. Smith, Zoltan Ring
  • Patent number: 6059452
    Abstract: A quick registering thermometer utilizing a sensor that has electrical resistance varying with temperature located at the tip of a probe, the sensor having relatively small thermal mass and short thermal time constant. Within seconds of contact with the patient, the circuitry communicating with the sensor determines the rate of change in resistance of the sensor and, in turn, the temperature that the sensor would reach if allowed the length of time it would need to reach equilibrium with the contact surface of the patient. Based on the equilibrium temperature determined for the surface of the patient, the circuitry calculates and registers the core body temperature.
    Type: Grant
    Filed: March 9, 1998
    Date of Patent: May 9, 2000
    Assignee: RTD Technology, Inc.
    Inventors: Richard P. Smith, Ned M. Cole, Jr., Roger B. Whitaker, Dale R. Andrews
  • Patent number: 5725308
    Abstract: A quick registering thermometer utilizing a sensor that has electrical resistance varying with temperature located at the tip of a probe, the sensor having relatively small thermal mass and short thermal time constant. Within seconds of contact with the patient, the circuitry communicating with the sensor determines the rate of change in resistance of the sensor and, in turn, the temperature that the sensor would reach if allowed the length of time it would need to reach equilibrium with the contact surface of the patient. Based on the equilibrium temperature determined for the surface of the patient, the circuitry calculates and registers the core body temperature. Included in the circuitry is an error adjustment mechanism for changing the calculated temperature as a function of the number of displays of the thermometer in a given period of time.
    Type: Grant
    Filed: December 23, 1994
    Date of Patent: March 10, 1998
    Assignee: RTD Technology, Inc.
    Inventors: Richard P. Smith, Ned M. Cole, Jr., Roger B. Whitaker, Dale R. Andrews
  • Patent number: 4885076
    Abstract: A system and method for analyzing molecular constituents of a composition sample includes: forming a solution of the sample, separating the solution by capillary electrophoresis into an eluent of constituents longitudinally separated according to their relative electrophoretic mobilities, electrospraying the eluent to form a charged spray in which the molecular constituents have a temporal distribution; and detecting or collecting the separated constituents in accordance with the temporal distribution in the spray. A first high-voltage (e.g., 5-100 KVDC) is applied to the solution. The spray is charged by applying a second high voltage (e.g., .+-.2-8 KVDC) between the eluent at the capillary exit and a cathode spaced in front of the exit. A complete electrical circuit is formed by a conductor which directly contacts the eluent at the capillary exit, or by conduction through a sheath electrode discharged in an annular sheath flow about the capillary exit.
    Type: Grant
    Filed: April 5, 1988
    Date of Patent: December 5, 1989
    Assignee: Battelle Memorial Institute
    Inventors: Richard P. Smith, Harold R. Udseth, Jose A. Olivares
  • Patent number: 4629236
    Abstract: A means for separating one coffee filter from a pack of filters employing a small device having one or more piercing elements. The handle or holder for the piercing elements fits comfortably in the hand. The strength, length, shape and size of the piercing means should be such that the elements penetrate the thickness of one paper filter without causing undue tearing, cutting or destruction of the filters while being able to withstand the lifting pressures exerted when breaking the suction and fiber adhesion of the top filter from the adjoining filter. A sheath for protecting the piercing elements may be in the form of a scoop or measuring receptacle.
    Type: Grant
    Filed: July 5, 1985
    Date of Patent: December 16, 1986
    Inventor: Richard P. Smith
  • Patent number: D294214
    Type: Grant
    Filed: June 4, 1985
    Date of Patent: February 16, 1988
    Inventor: Richard P. Smith