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: 7606735
    Abstract: Disclosed is a method of providing continuing education for keeping professionals aware and informed of developments in easily accessed categorized topical areas of interest on a for-payment basis, utilizing the Internet primarily as an audio format distribution means. The method can include a client providing attestation of access and listened-to-grasping of the information over the internet, the client making permanent library copies, and the client accessing information utilizing time and/or topic tags.
    Type: Grant
    Filed: March 9, 2004
    Date of Patent: October 20, 2009
    Inventor: James D. Welch
  • Patent number: 7522279
    Abstract: Disclosed are system for and method of analyzing the substantially the exact same point on a sample system with at least two wavelengths, or at least two ranges of wavelengths for which the focal lengths do not vary more than within an acceptable amount.
    Type: Grant
    Filed: June 5, 2006
    Date of Patent: April 21, 2009
    Assignee: J.A. Woollam Co., Inc
    Inventors: Martin M. Liphardt, Blaine D. Johs, Craig M. Herzinger, Ping He, Christopher A. Goeden, John A. Woollam, James D. Welch
  • Patent number: 7508510
    Abstract: System for and Method of analyzing a sample at substantially the exact same small spot thereon with a plurality of wavelengths using a lens system which provides the same focal length at at least two wavelengths at various positions thereof with respect to a sample, including analyzing data obtained at those wavelengths.
    Type: Grant
    Filed: December 12, 2006
    Date of Patent: March 24, 2009
    Assignee: J.A. Wooliam Co., Inc.
    Inventors: Galen L. Pfeiffer, Martin M. Liphardt, Blaine D. Johs, Craig M. Herzinger, Christopher A. Goeden, Ping He, John A. Woollam, James D. Welch
  • Patent number: 7505134
    Abstract: Systems and methodology for orienting the tip/tilt and vertical height of samples, preferably automated, as applied in ellipsometer and the like systems.
    Type: Grant
    Filed: April 21, 2006
    Date of Patent: March 17, 2009
    Assignee: J.A. Woollam Co., Inc
    Inventors: Blaine D. Johs, Ping He, Martin M. Liphardt, Christopher A. Goeden, John A. Woollam, James D. Welch
  • Patent number: 7489400
    Abstract: Application of Xenon arc-lamps to provide UV/deep UV wavelengths in spectrophotometer, reflectometer, ellipsometer, polarimeter or the like systems.
    Type: Grant
    Filed: August 3, 2006
    Date of Patent: February 10, 2009
    Assignee: J.A. Woollam Co., Inc.
    Inventors: Ping He, Martin M. Liphardt, James D. Welch
  • Patent number: 7477388
    Abstract: A system and method of preventing substrate backside reflected components in a beam of electromagnetic radiation caused to reflect from the surface of a sample in an ellipsometer or polarimeter system, involving placing a mask adjacent to the surface of the sample which allows electromagnetic radiation to access the sample over only a limited area, wherein the mask can include detector elements for collecting electromagnetic radiation reflected from the sample backside.
    Type: Grant
    Filed: May 24, 2006
    Date of Patent: January 13, 2009
    Assignee: J.A. Woollam Co., Inc.
    Inventors: Martin M. Liphardt, James D. Welch, Corey L. Bungay, John A. Woollam
  • Patent number: 7426030
    Abstract: Reflectometer, ellipsometer, polarimeter or the like system, which functionally comprise means for providing gas confined in a mini-chamber near the surface of a sample, at a location at which a beam having UV, VUV, IR and NIR wavelengths of electromagnetic radiation is caused to be impinged thereupon.
    Type: Grant
    Filed: February 10, 2007
    Date of Patent: September 16, 2008
    Assignee: J.A. Woollam Co., Inc.
    Inventors: Martin M. Liphardt, James D. Welch
  • Patent number: 7385698
    Abstract: A spectrophotometer, reflectometer, ellipsometer polarimeter or the like system having a detector means for independently intercepting electromagnetic radiation reflected from a sample frontside or backside, and methodology for pursuing less correlated determination of refractive index and thickness values.
    Type: Grant
    Filed: November 30, 2005
    Date of Patent: June 10, 2008
    Assignee: J.A. Woollam Co., Inc.
    Inventors: James D. Welch, John A. Woollam, Martin M. Liphardt
  • Patent number: 7345762
    Abstract: Disclosed are system for and method of analyzing substantially the exact same spot size on a sample system with at least two wavelengths for which the focal lengths do not vary more than within an acceptable amount.
    Type: Grant
    Filed: August 15, 2005
    Date of Patent: March 18, 2008
    Assignee: J.A. Woollam Co., Inc.
    Inventors: Martin M. Liphardt, Blaine D. Johs, John A. Woollam, Duane E. Meyer, James D. Welch
  • Patent number: 7317529
    Abstract: Systems and methods for providing and enhancing electromagnetic radiation beam radial energy homogeneity and intensity vs. wavelength content, for reliably directing electromagnetic radiation emitted by a source thereof in a common direction, for achromatically reducing spot size on a sample (eg. liquid cavity containing lenses and low aberration 1:1 imaging systems modified to perform as spatial filters), and for directing different wavelengths into different detectors, in ellipsometer, polarizer or the like systems.
    Type: Grant
    Filed: August 27, 2004
    Date of Patent: January 8, 2008
    Assignee: J.A. Woollam Co., Inc.
    Inventors: Martin M. Liphardt, Ping He, Blaine D. Johs, Galen L. Pfeiffer, James D. Welch, John A. Woollam
  • Patent number: 7283234
    Abstract: Improved methodology for monitoring deposition or removal of material to or from a process and/or wittness substrate which demonstrates a negative e1 at some wavelength. The method involves detection of changes in P-polarized electromagnetism ellipsometric DELTA at SPR Resonance Angle-of-Incidence (AOI) to monitor deposition of and/or removal of minute amounts of materials onto, or from, said process and/or witness substrate. The methodology can optionally monitor ellipsometric PSI, and involves simultaneously or sequentially applying non-P-polarized electromagnetism at the same angle of incidence, or electromagnetic radiation of any polarization at a different angle-of-incidence and wavelength to the process or wittness substrate and application of conventional ellipsometric analysis.
    Type: Grant
    Filed: December 16, 2004
    Date of Patent: October 16, 2007
    Assignee: J.A. Woollam Co., Inc.
    Inventors: John A. Woollam, Blaine D. Johs, Thomas E. Tiwald, Martin M. Liphardt, James D. Welch
  • Patent number: 7277171
    Abstract: A substantially self-contained “on-board” material system investigation system functionally mounted on a three dimensional locational system to enable positioning at desired locations on, and distances from, the surface of a large sample, including the capability to easily and conveniently change the angle-of-incidence of a beam of electromagnetic radiation onto a sample surface.
    Type: Grant
    Filed: April 14, 2005
    Date of Patent: October 2, 2007
    Assignee: J.A. Woollan Co., Inc.
    Inventors: Blaine D. Johs, Ping He, Martin M. Liphardt, Christopher A. Goeden, John A. Woollam, James D. Welch
  • Patent number: 7265838
    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 involving regression based methodology for evaluating and compensating the effects of the presence electromagnetic beam intercepting angle-of-incidence changing systems, including where desired, parameterization of calibration parameters.
    Type: Grant
    Filed: August 24, 2004
    Date of Patent: September 4, 2007
    Assignee: J.A. Woollam Co., Inc.
    Inventors: Blaine D. Johs, Ping He, Martin M. Liphardt, Christopher A. Goeden, John A. Woollam, James D. Welch
  • Patent number: 7253900
    Abstract: A spectrophotometer, ellipsometer or polarimeter or the like system with a spectroscopic source of wavelengths and a detector with multiple detector elements for simultaneous monitoring of a number of wavelengths in an environmental control chamber which optionally provides for secured sample entry, and methodology of use.
    Type: Grant
    Filed: October 9, 2004
    Date of Patent: August 7, 2007
    Assignee: J.A. Woollam Co., Inc.
    Inventors: John A. Woollam, Gregory K. Pribil, Martin M. Liphardt, James D. Welch
  • Patent number: 7215423
    Abstract: System and methodology for controlling a beam spot size where it impinges onto a sample, and/or discriminant selection and analysis of data from detector elements in a two dimensional detector array which correspond to identified regions on a sample.
    Type: Grant
    Filed: October 10, 2004
    Date of Patent: May 8, 2007
    Assignee: J.A. Woollam Co., Inc
    Inventors: Martin M. Liphardt, Blaine D. Johs, John A. Woollam, James D. Welch
  • Patent number: 7209234
    Abstract: A combined ellipsometer and oscillator system applied to a chamber for containing fluid, and method of decorrelated determination of thickness and optical constants of depostable materials present in a fluid. In use the ellipsometer determines the product of thickness and optical constant, and the oscillator system changes frequency of oscillation proportional to the thickness of material deposited upon a surface of an element therein.
    Type: Grant
    Filed: April 14, 2006
    Date of Patent: April 24, 2007
    Assignee: J.A. Woollam Co., Inc.
    Inventors: John A. Woollam, James D. Welch
  • Patent number: 7151605
    Abstract: Disclosed is methodology for obtaining data of improved precision, including detection and replacement of data determined to be suspect to provide good data over a spectroscopic range of wavelengths.
    Type: Grant
    Filed: December 11, 2004
    Date of Patent: December 19, 2006
    Assignee: J.A. Woollam Co., Inc
    Inventors: Craig M. Herzinger, Steven E. Green, Ronald A. Synowicki, James D. Welch
  • Patent number: 7057717
    Abstract: Disclosed are system for and method of analyzing the substantially the exact same point on a sample system with at least two wavelengths, or at least two ranges of wavelengths for which the focal lengths do not vary more than within an acceptable amount.
    Type: Grant
    Filed: April 30, 2003
    Date of Patent: June 6, 2006
    Assignee: J.A. Woollam Co., INC
    Inventors: Martin M. Liphardt, Blaine D. Johs, Craig M. Herzinger, Ping He, Christopher A. Goeden, John A. Woollam, James D. Welch
  • Patent number: 7030982
    Abstract: A combined ellipsometer and oscillator system and method of decorrelated determination of thickness and optical constants of deposted materials. In use the ellipsometer determines the product of thickness and optical constant, and the oscillator system changes frequency of oscillation proportional to the thickness of material deposited upon a surface of an element therein.
    Type: Grant
    Filed: December 25, 2003
    Date of Patent: April 18, 2006
    Assignee: J.A. Woollam Co., Inc.
    Inventors: John A. Woollam, James D. Welch
  • Patent number: 6930813
    Abstract: Disclosed is the application of spatial filters and beam energy homogenizing systems in ellipsometer and the like systems prior to a sample system. The purpose is to eliminate a radially outer annulus of a generally arbitrary intensity profile, so that electromagnetic beam intensity is caused to quickly decay to zero, rather than, for instance, demonstrate an irregular profile as a function of radius.
    Type: Grant
    Filed: April 29, 2003
    Date of Patent: August 16, 2005
    Assignee: J.A. Woollam Co. Inc.
    Inventors: Martin M. Liphardt, Blaine D. Johs, Craig M. Herzinger, Ping He, James D. Welch