Patents Assigned to Moxtek
  • Patent number: 8698091
    Abstract: A semiconductor detector device, such as a PIN diode or silicon drift detector, including a substrate with an entrance window. The entrance window comprises a conductive layer, and an insulating layer disposed between the conductive layer and the substrate. The insulating layer and conductive layer cover a center portion of the surface of the substrate.
    Type: Grant
    Filed: December 14, 2011
    Date of Patent: April 15, 2014
    Assignee: Moxtek, Inc.
    Inventors: Keith W. Decker, Derek Hullinger, Mark Alan Davis
  • Publication number: 20140016197
    Abstract: A wire grid polarizer can have a repeated pattern of groups of parallel elongated wires disposed over a substrate. Each group of wires can comprise at least three wires. At least one wire at an interior of each group can be taller than outermost wires of each group. The wires can be a byproduct of an etch reaction.
    Type: Application
    Filed: September 24, 2013
    Publication date: January 16, 2014
    Applicant: Moxtek, Inc.
    Inventor: Mark Davis
  • Patent number: 8611007
    Abstract: A fine pitch wire grid polarizer can have a pitch of less than 80 nanometers and a protective layer on the wires, by anisotropically etching the wire grid polarizer to form two parallel, elongated rods substantially located at corners where the wires contacted the substrate. The rods can be polarizing elements. A wire grid polarizer can have a repeated pattern of groups of parallel elongated wires disposed over a substrate. Each group of elongated wires comprises at least three wires. At least one wire at an interior of each group can be taller by more than about 10 nm than outermost wires of each group. Wires of a wire grid polarizer can be a byproduct of an etch reaction. A multi-step wire grid polarizer can comprise a base with a plurality of parallel multi-step ribs disposed on the base and a coating disposed along vertical surfaces of the steps.
    Type: Grant
    Filed: September 2, 2011
    Date of Patent: December 17, 2013
    Assignee: Moxtek, Inc.
    Inventor: Mark Alan Davis
  • Publication number: 20130258471
    Abstract: A grid polarizer including an array of groups of parallel elongated ribs disposed over a substrate. Each group of elongated ribs can comprise at least four ribs. Tops of two center ribs, at a center of each group, can be substantially the same elevational height and can be higher by more than 10 nm than tops of outer ribs of the groups. A region between adjacent ribs can have an index of refraction substantially equal to one. Some or all of the ribs can comprise polarizing wires disposed over substrate rods.
    Type: Application
    Filed: September 27, 2012
    Publication date: October 3, 2013
    Applicant: Moxtek, Inc.
    Inventor: Mark Alan Davis
  • Patent number: 8535616
    Abstract: Light enhancement devices, applications for the light enhancement devices, and methods for making the light enhancement devices are provided. The light enhancement devices include a substrate and a film of metal disposed over the substrate, the film of metal including at least one cavity. The cavity may be of various shapes depending on the desired application.
    Type: Grant
    Filed: October 21, 2009
    Date of Patent: September 17, 2013
    Assignees: Moxtek, Inc., University of Utah Research Foundation
    Inventors: Steven M. Blair, Mohit Diwekar, Sachin Attavar, Alexander Chagovetz, Mark Alan Davis, John Dredge
  • Patent number: 8526574
    Abstract: A circuit providing reliable voltage isolation between a low and high voltage sides of a circuit while allowing AC power transfer between the low and high voltage sides of the circuit to an x-ray tube filament. Capacitors provide the isolation between the low and high voltage sides of the circuit.
    Type: Grant
    Filed: September 24, 2010
    Date of Patent: September 3, 2013
    Assignee: Moxtek, Inc.
    Inventors: Dongbing Wang, Dave Reynolds
  • Publication number: 20130223109
    Abstract: An electrical circuit as part of a reduced size power supply with improved use of electrical power can include an isolation circuit between an LC switching circuit and a load, a parallel LC energy storage circuit, and/or a dual LC switching circuit.
    Type: Application
    Filed: January 14, 2013
    Publication date: August 29, 2013
    Applicant: Moxtek, Inc.
    Inventor: Moxtek, Inc.
  • Patent number: 8498381
    Abstract: An x-ray window comprising a plurality of thin film layers stacked together, including a thin film layer and a polymer layer. The thin film layer can be diamond, graphene, diamond-like carbon, beryllium, and combinations thereof. The polymer layer can be a polyimide. A boron hydride layer may also be included.
    Type: Grant
    Filed: October 7, 2010
    Date of Patent: July 30, 2013
    Assignee: Moxtek, Inc.
    Inventors: Steven Liddiard, Brian Taylor, Keith Decker, Jason Maynard
  • Publication number: 20130136237
    Abstract: A high voltage sensing resistor disposed on a cylinder that at least partially surrounds an evacuated enclosure of an x-ray tube.
    Type: Application
    Filed: January 17, 2013
    Publication date: May 30, 2013
    Applicant: Moxtek, Inc.
    Inventor: Moxtek, Inc.
  • Publication number: 20130094629
    Abstract: An x-ray window includes a mount with a support frame and an aperture. A window film has a stack of layers including: a thin film layer comprising a material selected from the group consisting of diamond, graphene, diamond-like carbon, beryllium, and combinations thereof; a boron hydride layer; and a polymer layer. The window film, including the thin film layer, the boron hydride layer, and the polymer layer, extends across the aperture and is supported by the support frame. The window film is attached to the support frame, defining a sealed joint. The layers are capable of withstanding a differential pressure of at least 1 atmosphere. The window film is substantially transmissive to x-rays having an energy in the range of 100-20,000 electronvolts.
    Type: Application
    Filed: December 5, 2012
    Publication date: April 18, 2013
    Applicant: Moxtek, Inc.
    Inventor: Moxtek, Inc.
  • Patent number: 8314468
    Abstract: A silicon drift detector (SDD) comprising electrically isolated rings. The rings can be individually biased doped rings. One embodiment includes an SDD with a single doped ring. Some of the doped rings may not require a bias voltage. Some of the rings can be field plate rings. The field plate rings may all use the same biasing voltage as a single outer doped ring. The ring widths can vary such that the outermost ring is widest and the ring widths decrease with each subsequent ring towards the anode.
    Type: Grant
    Filed: November 12, 2009
    Date of Patent: November 20, 2012
    Assignee: Moxtek, Inc.
    Inventors: Derek Hullinger, Hideharu Matsuura, Kazuo Taniguchi, Tadashi Utaka
  • Publication number: 20120212157
    Abstract: A planar filament comprising two bonding pads and a non-linear filament connected between the two bonding pads. The planar filament may be wider in the center to increase filament life. The planar filament can form a double spiral-serpentine shape. The planar filament may be mounted on a substrate for easier handling and placement. Voltage can be used to create an electrical current through the filament, and can result in the emission of electrons from the filament. The planar filament can be utilized in an x-ray tube.
    Type: Application
    Filed: August 15, 2011
    Publication date: August 23, 2012
    Applicant: Moxtek, Inc.
    Inventors: Sterling W. Cornaby, Erik C. Bard
  • Patent number: 8248696
    Abstract: A diffusive device has an array of discrete facets which may be of a size and pattern similar to a fractal. The facet dimensions can be greater than half the wavelength of incident light such that the facets substantially diffract light. A polarizing wire-grid layer comprised of an array of elongated parallel conductive wires with a period less than half the wavelength of incident light may be disposed between, beneath, or above the facets. The wire-grid polarizes the light by substantially reflecting light having an s-polarization orientation and substantially transmitting a portion of light having a p-polarization orientation.
    Type: Grant
    Filed: June 25, 2009
    Date of Patent: August 21, 2012
    Assignee: Moxtek, Inc.
    Inventors: Michael Lines, Eric W. Gardner, Mark Davis
  • Patent number: 8247971
    Abstract: A planar filament comprising two bonding pads and a non-linear filament connected between the two bonding pads. The planar filament may be wider in the center to increase filament life. The planar filament can form a double spiral-serpentine shape. The planar filament may be mounted on a substrate for easier handling and placement. Voltage can be used to create an electrical current through the filament, and can result in the emission of electrons from the filament. The planar filament can be utilized in an x-ray tube.
    Type: Grant
    Filed: August 15, 2011
    Date of Patent: August 21, 2012
    Assignee: Moxtek, Inc.
    Inventors: Erik C. Bard, Sterling W. Cornaby
  • Patent number: 8199882
    Abstract: A radiation detector with an integrated collimator. The collimator may be deposited on an anode or cathode face of the radiation detector. An insulating material may be deposited between the collimator and the radiation detector if the collimator is deposited on the anode side. The collimator may be comprised of a single layer or of multiple layers. Patterning and etching may be used to create an aperture in the collimator to allow x-rays to impinge on a full charge collection region of the radiation detector intrinsic region.
    Type: Grant
    Filed: December 7, 2009
    Date of Patent: June 12, 2012
    Assignee: Moxtek, Inc.
    Inventor: Keith Decker
  • Publication number: 20120076276
    Abstract: A circuit providing reliable voltage isolation between a low and high voltage sides of a circuit while allowing AC power transfer between the low and high voltage sides of the circuit to an x-ray tube filament. Capacitors provide the isolation between the low and high voltage sides of the circuit.
    Type: Application
    Filed: September 24, 2010
    Publication date: March 29, 2012
    Applicant: MOXTEK, INC.
    Inventors: Dongbing Wang, Dave Reynolds
  • Patent number: 8058674
    Abstract: A 4-Terminal JFET includes a substrate having a first conduction type and an upper layer having a second, opposite, conduction type over the substrate. A gate and a source are embedded in the upper layer. A gate pad is electrically connected to the gate. A region, which has a first conduction type, is formed in the upper layer and separates the upper layer into two sections. This region reduces the overall capacitance between the gate pad and the source. Reduced overall gate to source capacitance can result in reduced noise amplification in the JFET.
    Type: Grant
    Filed: October 7, 2009
    Date of Patent: November 15, 2011
    Assignee: Moxtek, Inc.
    Inventors: Derek Hullinger, Keith Decker
  • Patent number: 8027087
    Abstract: A wire-grid polarizer includes a wire-grid layer disposed over a substrate. A plurality of contiguous dielectric-grid layers are contiguous with one another and disposed directly on top of the wire-grid layer. The plurality of contiguous dielectric-grid layers includes different materials with different indices of refraction. The array of dielectric material elements and the array of metal elements are oriented substantially parallel with one another, and the arrays having substantially equal periods.
    Type: Grant
    Filed: September 10, 2010
    Date of Patent: September 27, 2011
    Assignee: Moxtek, Inc.
    Inventors: Raymond T. Perkins, Cheng-Yuan Cheng, Douglas P. Hansen, Eric W. Gardner
  • Patent number: 7983394
    Abstract: A multiple wavelength x-ray source includes a multi-thickness target, having at least a first and a second thickness. The first thickness can substantially circumscribe the second thickness. An electron beam can be narrowed to impinge primarily upon second thickness or expanded to impinge primarily upon the first thickness while maintaining a constant direction of the beam. This invention allows the target thickness to be optimized for the desired output wavelength without the need to redirect or realign the x-rays towards the target.
    Type: Grant
    Filed: December 17, 2009
    Date of Patent: July 19, 2011
    Assignee: Moxtek, Inc.
    Inventors: Krzysztof Kozaczek, Sterling Cornaby, Steven Liddiard, Charles Jensen
  • Patent number: 7961393
    Abstract: A selectively absorptive, mulitlayer wire-grid polarizer for polarizing incident light includes a stack of thin film layers disposed over a substrate, including a wire-grid array of elongated metal elements having a period less than half the wavelength of the light. One of the layers can include a thin film layer with a refractive index greater than a refractive index of the substrate. One of the thin film layers can include a dielectric array of non-metal elements. One of the layers includes a material that is optically absorptive to the incident light.
    Type: Grant
    Filed: June 22, 2007
    Date of Patent: June 14, 2011
    Assignee: Moxtek, Inc.
    Inventors: Raymond T. Perkins, Mark A. Davis, Bin Wang, Eric W. Gardner