Patents by Inventor John Harold Tregilgas

John Harold Tregilgas 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).

  • Intrinsic p-type HgCdTe using CdTe capping layer
    Patent number: 6114738
    Abstract: A hybrid focal plane array has Hg.sub.1-x Cd.sub.x Te junction photodiodes formed in a substrate of HgCdTe which is capped by a layer of Te-rich CdTe. Type conversion of a low metal vacancy HgCdTe substrate to p-type is performed by annealing the capped substrate at a temperature sufficient to support interdiffusion between the Te-rich CdTe capping layer and the HgCdTe substrate. Use of the CdTe capping layer with a slight excess Te maintains the surface of the HgCdTe substrate in a Te-rich phase condition.
    Type: Grant
    Filed: September 28, 1999
    Date of Patent: September 5, 2000
    Assignee: DRS FPA, L.P.
    Inventors: John Harold Tregilgas, Arthur Monroe Turner
  • Method of producing intrinsic p-type HgCdTe using CdTe capping layer
    Patent number: 6030853
    Abstract: A hybrid focal plane array has Hg.sub.1-x Cd.sub.x Te junction photodiodes formed in a substrate of HgCdTe which is capped by a layer of Te-rich CdTe. Type conversion of a low metal vacancy HgCdTe substrate to p-type is performed by annealing the capped substrate at a temperature sufficient to support interdiffusion between the Te-rich CdTe capping layer and the HgCdTe substrate. Use of the CdTe capping layer with a slight excess Te maintains the surface of the HgCdTe substrate in a Te-rich phase condition.
    Type: Grant
    Filed: August 13, 1993
    Date of Patent: February 29, 2000
    Assignee: DRS FPA, L.P.
    Inventors: John Harold Tregilgas, Arthur Monroe Turner
  • Micromechanical device with reduced load relaxation
    Patent number: 5942054
    Abstract: An improved elastic member (24) for micromechanical devices (12). The micromechanical device (12) includes a stationary member (28) and a moving member (26) which are connected together by a elastic member (24). Because of repeated and frequent movement of the moving member (26), the elastic member (24) can become permanently flexed or deformed, resulting in poor operation of the device. Aluminum alloys are formed to include oxygen, in combination with nitrogen if desired, to obtain a film with dramatically reduced load relaxation characteristics. Oxygen is added to an Argon sputter gas during deposition, and an amorphous film is produced.
    Type: Grant
    Filed: December 20, 1996
    Date of Patent: August 24, 1999
    Assignee: Texas Instruments Incorporated
    Inventors: John Harold Tregilgas, Richard Lee Knipe, Thomas William Orent, Hidekazu Yoshihara, Elliott Keith Carpenter