Patents by Inventor James D. Welch

James D. Welch 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: 6859278
    Abstract: Disclosed is a system for enabling easy sequential setting of different Angles-of-Incidence of a beam of electromagnetic radiation to a surface of a sample system, and to regression based methodology for evaluating and compensating the effects of the presence of electromagnetic beam intercepting angle-of-incidence changing systems, including where desired, parameterization of calibration parameters.
    Type: Grant
    Filed: January 15, 2002
    Date of Patent: February 22, 2005
    Assignee: J.A. Woollam Co. Inc.
    Inventors: Blaine D. Johs, Ping He, Martin M. Liphardt, Christopher A. Goeden, John A. Woollam, James D. Welch
  • Publication number: 20040004262
    Abstract: Semiconductor devices formed in fully or partially compensated semiconductor, (substrate or epi-layer), including minimal current flow voltage switching devices with at least one junction which is rectifying when the semiconductor is caused to be N or P-type by the presence of applied gate voltage field induced carriers, such as inverting and non-inverting gate voltage channel induced semiconductor single devices with operating characteristics similar to conventional multiple device CMOS systems.
    Type: Application
    Filed: June 26, 2003
    Publication date: January 8, 2004
    Inventor: James D. Welch
  • Patent number: 6624493
    Abstract: Disclosed are semiconductor devices including at least one junction which is rectifying whether the semiconductor is caused to be N or P-type, by the presence of applied gate voltage field induced carriers in essentially intrinsic, essentially homogeneously simultaneously containing both N and P-type metallurgical dopants at substantially equal doping levels, essentially homogeneously simultaneously containing both N and P-type metallurgical dopants at different doping levels, and containing a single metallurgical doping type, and functional combinations thereof. In particular, inverting and non-inverting gate voltage channel induced semiconductor single devices with operating characteristics similar to conventional multiple device CMOS systems, which can be operated as modulators, are disclosed as are a non-latching SCR and an approach to blocking parasitic currents utilizing material(s) which form rectifying junctions with both N and P-type semiconductor whether metallurigically or field induced.
    Type: Grant
    Filed: November 20, 2000
    Date of Patent: September 23, 2003
    Inventor: James D. Welch
  • Patent number: 6590655
    Abstract: Disclosed are systems for, and methods of controlling radial energy density profiles in, and/or cross-section dimensioning of electromagnetic beams in polarimeters, ellipsometers, reflectometers and spectrophotometers.
    Type: Grant
    Filed: April 23, 2001
    Date of Patent: July 8, 2003
    Assignee: J.A. Woollam Co. Inc.
    Inventors: James D. Welch, Blaine D. Johs, Martin M. Liphardt, Ping He
  • Publication number: 20010033377
    Abstract: Disclosed are systems for, and methods of controlling radial energy density profiles in, and/or cross-section dimensioning of electromagnetic beams in polarimeters, ellipsometers, reflectometers and spectrophotometers.
    Type: Application
    Filed: April 23, 2001
    Publication date: October 25, 2001
    Inventors: James D. Welch, Blaine D. Johs, Martin M. Liphardt, Ping He
  • Patent number: 6268636
    Abstract: Disclosed are semiconductor devices including at least one junction which is rectifying whether the semiconductor is caused to be N or P-type, by the presence of field induced carriers. In particular, inverting and non-inverting gate voltage channel induced semiconductor single devices with operating characteristics similar to conventional multiple device CMOS systems, which can be operated as modulators, are disclosed as are a non-latching SCR and an approach to blocking parasitic currents. Operation of the gate voltage channel induced semiconductor single devices with operating characteristics similar to multiple device CMOS systems under typical bias schemes is described, and simple demonstrative five mask fabrication procedures for the inverting and non-inverting gate voltage channel induced semiconductor single devices with operating characteristics similar to multiple device CMOS systems are also presented.
    Type: Grant
    Filed: February 8, 1999
    Date of Patent: July 31, 2001
    Inventor: James D. Welch
  • Patent number: 6091128
    Abstract: Disclosed are semiconductor systems, such as integrated circuits utilizing Schotky barrier and/or diffused junction technology, which semiconductor systems incorporate material(s) that form rectifying junctions in both metallurgically and/or field induced N and P-type doping regions, and methods of their use. Disclosed are Schottky barrier based inverting and non-inverting gate voltage channel induced semiconductor single devices with operating characteristics similar to multiple device CMOS systems and which can be operated as modulators, N and P-channel MOSFETS and CMOS formed therefrom, and (MOS) gate voltage controlled rectification direction and gate voltage controlled switching devices, and use of such material(s) to block parasitic current flow pathways. Simple demonstrative five mask fabrication procedures for inverting and non-inverting gate voltage channel induced semiconductor single devices with operating characteristics similar to multiple device CMOS systems are also presented.
    Type: Grant
    Filed: March 3, 1998
    Date of Patent: July 18, 2000
    Inventor: James D. Welch
  • Patent number: 5760449
    Abstract: Complementary Metal Oxide Semiconductor (CMOS) Schottky barrier Field Effect Transistor systems, which are a seriesed combination of N and P-Channel MOSFETS, in which Source Schottky barrier junctions of the N and P-Channel Schottky barrier MOSFETS are electically interconnected, (rather than the Drains as in conventional diffused junction CMOS), which Schottky barrier MOSFET system demonstrates Regenerative Inverting Switching Characteristics in use are disclosed. Both the N and P-Channel Schottky barrier MOSFET devices are unique in that they provide operational Drain Current vs. Drain to Source voltage as a function of Gate voltage only where the polarities of the Drain voltage and Gate voltage are opposite, referenced to the Source as a common terminal, and where the polarity of the voltage applied to the Gate is appropriate to cause Channel inversion.
    Type: Grant
    Filed: December 26, 1995
    Date of Patent: June 2, 1998
    Inventor: James D. Welch
  • Patent number: 5663584
    Abstract: (MOS) device systems-utilizing Schottky barrier source and drain to channel region junctions are disclosed. Experimentally derived results which demonstrate operation of fabricated N-channel and P-channel Schottky barrier (MOSFET) devices, and of fabricated single devices with operational characteristics similar to (CMOS) and to a non-latching (SRC) are reported. Use of essentially non-rectifying Schottky barriers in (MOS) structures involving highly doped and the like and intrinsic semiconductor to allow non-rectifying interconnection of, and electrical accessing of device regions is also disclosed. Insulator effected low leakage current device geometries and fabrication procedures therefore are taught.
    Type: Grant
    Filed: December 29, 1994
    Date of Patent: September 2, 1997
    Inventor: James D. Welch
  • Patent number: 4696093
    Abstract: A method for fabricating MOSFET devices by a one mask, one etch process utilizing vacuum deposited chromium, silicon upon which is grown SiO.sub.2 and an anneal process. An optional optimizing ion implantation and activating anneal step is also disclosed, as are two, and three, mask and etch procedures.
    Type: Grant
    Filed: June 9, 1986
    Date of Patent: September 29, 1987
    Inventor: James D. Welch
  • Patent number: 4623919
    Abstract: A method and system for making possible enforceable subscription available electromagnetically transmitted communications. Mailable receiver tuning components are described which serve to make receivers operable in the presence of a control signal, said signal being comodulated with an information signal.
    Type: Grant
    Filed: August 11, 1983
    Date of Patent: November 18, 1986
    Inventor: James D. Welch
  • Patent number: D441816
    Type: Grant
    Filed: May 16, 2000
    Date of Patent: May 8, 2001
    Assignee: GetaGadget, Inc.
    Inventor: James D. Welch
  • Patent number: D441817
    Type: Grant
    Filed: May 16, 2000
    Date of Patent: May 8, 2001
    Assignee: GetaGadget, Inc.
    Inventor: James D. Welch
  • Patent number: D259514
    Type: Grant
    Filed: September 1, 1978
    Date of Patent: June 9, 1981
    Inventor: James D. Welch
  • Patent number: D317363
    Type: Grant
    Filed: July 29, 1988
    Date of Patent: June 4, 1991
    Inventor: James D. Welch