Patents Represented by Attorney, Agent or Law Firm Brian D. Ogonowsky
  • Patent number: 6800173
    Abstract: A deposition system in accordance with one embodiment of the present invention includes a process chamber, a stationary pedestal for supporting a substrate in the process chamber, and a moveable shield forming at least a portion of an enclosure defining the process chamber. Motion of the shield with respect to the stationary pedestal controls a variable gas conductance path for gases flowing through the process chamber thereby modulating the pressure of the process chamber with respect to an external volume. The moveable shield in accordance with an embodiment of the present invention may include several gas channel openings for introducing various process gases into the process chamber. In some embodiments, the moveable shield may alternatively or additionally include an interior cooling or heating channel for temperature control.
    Type: Grant
    Filed: July 9, 2001
    Date of Patent: October 5, 2004
    Assignee: Novellus Systems, Inc.
    Inventors: Tony P. Chiang, Karl F. Leeser, Jeffrey A. Brown, Jason E. Babcoke
  • Patent number: 6791636
    Abstract: In one embodiment, a color, transmissive LCD uses red, green, and blue LEDs as the light source. The red LED is optically coupled to a first edge of a rectangular light guide; the green LED is optically coupled to a second edge of the light guide; and the blue LED is optically coupled to a third edge of the light guide. Three sets of deformities in the light guide selectively direct the R, G, and B light out of the front surface of the light guide. The R, G, and B LEDs are constantly on and there is no color filtering. In another embodiment, a blue light LED is optically coupled to one or more edges of a light guide, and phosphor strips are placed on a surface of the light guide coinciding with the red and green pixel columns. Deformities below the red and green phosphor strips and below the blue pixel areas direct blue light to the backs of the phosphor strips and to the blue pixel areas. If an ultraviolet light LED is used, phosphor strips for the blue pixel areas would also be used.
    Type: Grant
    Filed: May 10, 2001
    Date of Patent: September 14, 2004
    Assignee: Lumilecs Lighting U.S., LLC
    Inventors: Steven PĂ olini, Gerard Harbers, Wayne L. Snyder
  • Patent number: 6776713
    Abstract: In one embodiment of the invention, a game involves the player playing against a gaming machine's computer such that a victory by the player in the game grants an award to the player. In one particular game, the player and computer compete to build a structure created from objects. The player and computer alternate turns. The player chooses from a number of icons, each representing a hidden object, with the hope of choosing the tallest object, and the computer randomly selects an object. The player attempts to build a structure above a winning height before the computer's structure reaches the winning height. Along the way, the player is given various options, such as the option to change positions with the computer, the option to buy an object, or other types of options.
    Type: Grant
    Filed: November 26, 2002
    Date of Patent: August 17, 2004
    Assignee: Atronic International GmbH
    Inventor: Michael Gauselmann
  • Patent number: 6768525
    Abstract: A color, transmissive LCD is described herein which uses red, green, and blue LEDs as the light source. The R, G, and B LEDs are coupled to separate light guides, one light guide for each color. These light guides may take the form of three overlying plastic or glass sheets. In another embodiment, thin fiber optic cables arranged parallel to each other on a supporting surface are used as the light guides, and each fiber optic cable is optically coupled to only one R, G, or B LED in a repeating pattern. The light guides contain deformities to emit light coinciding with the positions of the red, green, and blue pixels. The R, G, and B LEDs are constantly on, and there is no color filtering.
    Type: Grant
    Filed: December 1, 2000
    Date of Patent: July 27, 2004
    Assignee: Lumileds Lighting U.S. LLC
    Inventors: Steven Paolini, Gerard Harbers, Wayne L. Snyder
  • Patent number: 6676513
    Abstract: The gaming device displays an array of randomly selected symbols. In one embodiment, only a first jackpot can be awarded to a player if a first bet is made, and both the first jackpot and a second jackpot can be awarded to the player if a higher bet is made. In one embodiment, the first jackpot is associated with all pay lines that are evaluated from left to right, and the second jackpot B is associated with all pay lines that are evaluated from right to left. The amounts in both jackpots are displayed to the player. Additionally, all non-jackpot awards according to the winning symbol combinations from left to right and right to left are granted to the player, depending on the amount of the bet. Due to certain features of the game, the player can exercise strategy in making the appropriate bet.
    Type: Grant
    Filed: September 9, 2002
    Date of Patent: January 13, 2004
    Assignee: Atronic International GmbH
    Inventor: Michael Gauselmann
  • Patent number: 6642618
    Abstract: A light-emitting device comprises a substrate, electrical terminals disposed on a top side of the substrate, and a light-emitting semiconductor device disposed above the substrate. The light-emitting semiconductor device has a bottom side oriented to face toward the top side of the substrate. Electrodes are disposed on the bottom side of the light-emitting semiconductor device and electrically connected to the terminals on the substrate. A glass layer is arranged in a path of output light emitted by the light-emitting semiconductor device. The glass layer contains fluorescent material that converts at least a portion of the output light to converted light having a wavelength different from a wavelength of the output light. The fluorescent material may include SrS:Eu2+ that emits red light and (Sr, Ba, Ca)Ga2S4:Eu2+ that emits green light.
    Type: Grant
    Filed: June 11, 2001
    Date of Patent: November 4, 2003
    Assignee: Lumileds Lighting U.S., LLC
    Inventors: Takaaki Yagi, Takeshi Tamura, Fusanori Arakane
  • Patent number: 6630201
    Abstract: A method for conducting an ALD process to deposit layers on a substrate which includes an electrostatic chuck (ESC) to retain the substrate. Electrode(s) in the chuck assembly are used to induce a voltage on the substrate to promote precursor adsorption on the substrate.
    Type: Grant
    Filed: October 24, 2001
    Date of Patent: October 7, 2003
    Assignee: Angstron Systems, Inc.
    Inventors: Tony P. Chiang, Karl F. Leeser, Jeffrey A. Brown, Jason E. Babcoke
  • Patent number: 6576488
    Abstract: Presented is a method of conformally coating a light emitting semiconductor structure with a phosphor layer to produce a substantially uniform white light. A light emitting semiconductor structure is coupled to a submount, a first bias voltage is applied to the submount, and a second bias voltage is applied to a solution of charged phosphor particles. The charged phosphor particles deposit on the conductive surfaces of the light emitting semiconductor structure. If the light emitting semiconductor structure includes a nonconductive substrate, the light emitting semiconductor structure is coated with an electroconductive material to induce phosphor deposition. The electrophoretic deposition of the phosphor particles creates a phosphor layer of uniform thickness that produces uniform white light without colored rings.
    Type: Grant
    Filed: June 11, 2001
    Date of Patent: June 10, 2003
    Assignee: Lumileds Lighting U.S., LLC
    Inventors: William David Collins, III, Michael R. Krames, Godefridus Johannes Verhoeckx, Nicolaas Joseph Martin van Leth
  • Patent number: 6574328
    Abstract: In one embodiment, the system includes a processor (referred to herein as a tandem access controller) connected to the PSTN which would allow anyone to directly provision, that is to say set-up and make immediate changes to, the configuration of his or her phone line. In another embodiment, a tandem access controller (TAC) subsystem is connected internally to the PSTN in a local service area. The TAC provides features, selected by the subscriber, to all edge switches connected to the PSTN tandem switch. In one embodiment, the TAC is controlled by the subscriber using the web.
    Type: Grant
    Filed: May 4, 2000
    Date of Patent: June 3, 2003
    Assignee: Telemaze, Inc.
    Inventors: Samuel F. Wood, Margaret Susan Asprey, Jerry A. Klein
  • Patent number: 6569704
    Abstract: An optical semiconductor device having a plurality of GaN-based semiconductor layers containing a strained quantum well layer in which the strained quantum well layer has a piezoelectric field that depends on the orientation of the strained quantum well layer when the quantum layer is grown. In the present invention, the strained quantum well layer is grown with an orientation at which the piezoelectric field is less than the maximum value of the piezoelectric field strength as a function of the orientation. In devices having GaN-based semiconductor layers with a wurtzite crystal structure, the growth orientation of the strained quantum well layer is tilted at least 1° from the {0001} direction of the wurtzite crystal structure. In devices having GaN-based semiconductor layers with a zincblende crystal structure, the growth orientation of the strained quantum well layer is tilted at least 1° from the {111} direction of the zincblende crystal structure.
    Type: Grant
    Filed: November 21, 2000
    Date of Patent: May 27, 2003
    Assignee: Lumileds Lighting U.S., LLC
    Inventors: Tetsuya Takeuchi, Norihide Yamada, Hiroshi Amano, Isamu Akasaki
  • Patent number: 6570190
    Abstract: The invention is a method for designing semiconductor light emitting devices such that the side surfaces (surfaces not parallel to the epitaxial layers) are formed at preferred angles relative to vertical (normal to the plane of the light-emitting active layer) to improve light extraction efficiency and increase total light output efficiency. Device designs are chosen to improve efficiency without resorting to excessive active area-yield loss due to shaping. As such, these designs are suitable for low-cost, high-volume manufacturing of semiconductor light-emitting devices with improved characteristics.
    Type: Grant
    Filed: December 6, 2000
    Date of Patent: May 27, 2003
    Assignee: Lumileds Lighting, U.S., LLC
    Inventors: Michael R Krames, Fred A Kish, Jr., Tun S Tan
  • Patent number: 6547249
    Abstract: Series or parallel LED arrays are formed on a highly resistive substrate, such that both the p- and n-contacts for the array are on the same side of the array. The individual LEDs are electrically isolated from each other by trenches or by ion implantation. Interconnects deposited on the array connects the contacts of the individual LEDs in the array. In some embodiments, the LEDs are III-nitride devices formed on sapphire substrates. In one embodiment, two LEDs formed on a single substrate are connected in antiparallel to form a monolithic electrostatic discharge protection circuit. In one embodiment, multiple LEDs formed on a single substrate are connected in series . In one embodiment, multiple LEDs formed on a single substrate are connected in parallel. In some embodiments, a layer of phosphor covers a portion of the substrate on which one or more individual LEDs is formed.
    Type: Grant
    Filed: March 29, 2001
    Date of Patent: April 15, 2003
    Assignee: Lumileds Lighting U.S., LLC
    Inventors: William David Collins, III, Jerome Chandra Bhat, Daniel Alexander Steigerwald
  • Patent number: 6537838
    Abstract: To allow hydrogen to out-diffuse from a buried Group III-nitride compound semiconductor p-type layer, the wafer is etched to form trenches in the p-type layer to expose sides of the p-type layer. After the etch, the wafer is then annealed. The duration and temperature of the anneal depend upon the spacing of the exposed sides of the p-type layer and the thickness of the p-type layer. The hydrogen diffuses easily through the p-type layer and out the sides exposed by the trenches. The result is a buried p-type layer that is more highly conductive than had the trenches not been formed prior to the anneal. In another embodiment, a surface of an acceptor-doped Group III-V p-type layer is covered with an overlying n-type layer. A portion of the n-type layer is etched to expose the surface of the p-type layer. An anneal is then carried out to out-diffuse hydrogen from the exposed surface of the p-type layer to increase the conductivity of the p-type layer.
    Type: Grant
    Filed: June 11, 2001
    Date of Patent: March 25, 2003
    Assignee: Limileds Lighting, U.S., LLC
    Inventor: Stephen A. Stockman
  • Patent number: 6537513
    Abstract: A substrate for fabricating semiconductor devices based on Group III semiconductors and the method for making the same. A substrate according to the present invention includes a base substrate, a first buffer layer, and a first single crystal layer. The first buffer layer includes a Group III material deposited on the base substrate at a temperature below that at which the Group III material crystallizes. The Group III material is crystallized by heating the buffer layer to a temperature above that at which the Group III material crystallizes to form a single crystal after the Group III material has been deposited. The first single crystal layer includes a Group III-V semiconducting material deposited on the first buffer layer at a temperature above that at which the Group III semiconducting material crystallizes. In one embodiment of the present invention, a second buffer layer and a second single crystal layer are deposited on the first single crystal layer.
    Type: Grant
    Filed: April 27, 2000
    Date of Patent: March 25, 2003
    Assignee: Lumileds Lighting U.S., LLC
    Inventors: Hiroshi Amano, Tetsuya Takeuchi, Isamu Akasaki
  • Patent number: 6534791
    Abstract: A nitride semiconductor epitaxial substrate includes a low-temperature-deposited buffer layer, the composition of which is AlxGa1−xN, where 0≦x≦1, and a single crystalline layer, the composition of which is AlyGa1−yN, where 0>y≦1. The single crystalline layer is deposited directly over the low-temperature-deposited buffer layer, wherein the buffer layer has a mole fraction x satisfying (y−0.3)≦x>y.
    Type: Grant
    Filed: September 6, 2001
    Date of Patent: March 18, 2003
    Assignee: Lumileds Lighting U.S., LLC
    Inventors: Nobuaki Hayashi, Tetsuya Takeuchi, Hiroshi Amano, Isamu Akasaki
  • Patent number: 6532288
    Abstract: In one embodiment, the system includes a processor (referred to herein as a tandem access controller) connected to the PSTN which would allow anyone to directly provision, that is to say set-up and make immediate changes to, the configuration of his or her phone line. In another embodiment, a tandem access controller (TAC) subsystem is connected internally to the PSTN in a local service area. The TAC provides features, selected by the subscriber, to all edge switches connected to the PSTN tandem switch. In one embodiment, the TAC is controlled by the subscriber using the web.
    Type: Grant
    Filed: May 4, 2000
    Date of Patent: March 11, 2003
    Assignee: Telemaze, Inc.
    Inventors: Samuel F. Wood, Margaret Susan Asprey, Jerry A. Klein
  • Patent number: 6529596
    Abstract: In one embodiment, the system includes a processor (referred to herein as a tandem access controller) connected to the PSTN which would allow anyone to directly provision, that is to say set-up and make immediate changes to, the configuration of his or her phone line. In another embodiment, a tandem access controller (TAC) subsystem is connected internally to the PSTN in a local service area. The TAC provides features, selected by the subscriber, to all edge switches connected to the PSTN tandem switch. In one embodiment, the TAC is controlled by the subscriber using the web.
    Type: Grant
    Filed: May 4, 2000
    Date of Patent: March 4, 2003
    Assignee: Telemaze, Inc.
    Inventors: Margaret Susan Asprey, Samuel F. Wood, Jerry A. Klein
  • Patent number: 6526082
    Abstract: A light-generating device such as a laser or LED. A light-generating device according to the present invention includes a first n-electrode layer in contact with a first n-contact layer, the first n-contact layer including an n-doped semiconductor. Light is generated by the recombination of holes and electrons in an n-p active layer. The n-p active layer includes a first p-doped layer in contact with a first n-doped layer, the first n-doped layer being connected electrically with the first n-contact layer. A p-n reverse-biased tunnel diode constructed from a second p-doped layer in contact with a second n-doped layer is connected electrically such that the second p-doped layer is connected electrically with the first p-layer. A second n-contact layer constructed from an n-doped semiconductor material is connected electrically to the second n-doped layer. A second n-electrode layer is placed in contact with the second n-contact layer.
    Type: Grant
    Filed: June 2, 2000
    Date of Patent: February 25, 2003
    Assignee: Lumileds Lighting U.S., LLC
    Inventors: Scott W. Corzine, Richard P. Schneider, Jr., Ghulam Hasnain
  • Patent number: 6518079
    Abstract: A method for separating semiconductor devices is disclosed. The method includes providing a substrate having one or more epitaxial layers formed thereon, forming trenches in the one or more epitaxial layers, forming scribe lines in a surface of the substrate, wherein the locations of the scribe lines correspond to the locations of the trenches, and separating the semiconductor devices by cracking the wafer along the scribe lines.
    Type: Grant
    Filed: December 20, 2000
    Date of Patent: February 11, 2003
    Assignee: Lumileds Lighting, U.S., LLC
    Inventor: William R. Imler
  • Patent number: 6504301
    Abstract: An LED package and a method of fabricating the LED package utilize a prefabricated fluorescent member that contains a fluorescent material that can be separately tested for optical properties before assembly to ensure the proper performance of the LED package with respect to the color of the output light. The LED package includes one or more LED dies that operate as the light source of the package. Preferably, the fluorescent material included in the prefabricated fluorescent member and the LED dies of the LED package are selectively chosen, so that output light generated by the LED package duplicates natural white light. In a first embodiment of the invention, the prefabricated fluorescent member is a substantially planar plate having a disk-like shape. In a second embodiment, the prefabricated fluorescent member is a non-planar disk that conforms to and is attached to the inner surface of a concave lens.
    Type: Grant
    Filed: September 3, 1999
    Date of Patent: January 7, 2003
    Assignee: LumiLeds Lighting, U.S., LLC
    Inventor: Christopher H. Lowery