Patents Represented by Attorney, Agent or Law Firm Brian D. Ogonowsky
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Patent number: 6800173Abstract: 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: GrantFiled: July 9, 2001Date of Patent: October 5, 2004Assignee: Novellus Systems, Inc.Inventors: Tony P. Chiang, Karl F. Leeser, Jeffrey A. Brown, Jason E. Babcoke
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Patent number: 6791636Abstract: 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: GrantFiled: May 10, 2001Date of Patent: September 14, 2004Assignee: Lumilecs Lighting U.S., LLCInventors: Steven PĂ olini, Gerard Harbers, Wayne L. Snyder
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Patent number: 6776713Abstract: 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: GrantFiled: November 26, 2002Date of Patent: August 17, 2004Assignee: Atronic International GmbHInventor: Michael Gauselmann
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Patent number: 6768525Abstract: 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: GrantFiled: December 1, 2000Date of Patent: July 27, 2004Assignee: Lumileds Lighting U.S. LLCInventors: Steven Paolini, Gerard Harbers, Wayne L. Snyder
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Patent number: 6676513Abstract: 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: GrantFiled: September 9, 2002Date of Patent: January 13, 2004Assignee: Atronic International GmbHInventor: Michael Gauselmann
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Patent number: 6642618Abstract: 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: GrantFiled: June 11, 2001Date of Patent: November 4, 2003Assignee: Lumileds Lighting U.S., LLCInventors: Takaaki Yagi, Takeshi Tamura, Fusanori Arakane
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Patent number: 6630201Abstract: 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: GrantFiled: October 24, 2001Date of Patent: October 7, 2003Assignee: Angstron Systems, Inc.Inventors: Tony P. Chiang, Karl F. Leeser, Jeffrey A. Brown, Jason E. Babcoke
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Patent number: 6576488Abstract: 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: GrantFiled: June 11, 2001Date of Patent: June 10, 2003Assignee: Lumileds Lighting U.S., LLCInventors: William David Collins, III, Michael R. Krames, Godefridus Johannes Verhoeckx, Nicolaas Joseph Martin van Leth
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Patent number: 6574328Abstract: 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: GrantFiled: May 4, 2000Date of Patent: June 3, 2003Assignee: Telemaze, Inc.Inventors: Samuel F. Wood, Margaret Susan Asprey, Jerry A. Klein
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Patent number: 6569704Abstract: 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: GrantFiled: November 21, 2000Date of Patent: May 27, 2003Assignee: Lumileds Lighting U.S., LLCInventors: Tetsuya Takeuchi, Norihide Yamada, Hiroshi Amano, Isamu Akasaki
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Patent number: 6570190Abstract: 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: GrantFiled: December 6, 2000Date of Patent: May 27, 2003Assignee: Lumileds Lighting, U.S., LLCInventors: Michael R Krames, Fred A Kish, Jr., Tun S Tan
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Patent number: 6547249Abstract: 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: GrantFiled: March 29, 2001Date of Patent: April 15, 2003Assignee: Lumileds Lighting U.S., LLCInventors: William David Collins, III, Jerome Chandra Bhat, Daniel Alexander Steigerwald
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Patent number: 6537513Abstract: 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: GrantFiled: April 27, 2000Date of Patent: March 25, 2003Assignee: Lumileds Lighting U.S., LLCInventors: Hiroshi Amano, Tetsuya Takeuchi, Isamu Akasaki
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Patent number: 6537838Abstract: 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: GrantFiled: June 11, 2001Date of Patent: March 25, 2003Assignee: Limileds Lighting, U.S., LLCInventor: Stephen A. Stockman
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Patent number: 6534791Abstract: 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: GrantFiled: September 6, 2001Date of Patent: March 18, 2003Assignee: Lumileds Lighting U.S., LLCInventors: Nobuaki Hayashi, Tetsuya Takeuchi, Hiroshi Amano, Isamu Akasaki
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Patent number: 6532288Abstract: 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: GrantFiled: May 4, 2000Date of Patent: March 11, 2003Assignee: Telemaze, Inc.Inventors: Samuel F. Wood, Margaret Susan Asprey, Jerry A. Klein
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Patent number: 6529596Abstract: 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: GrantFiled: May 4, 2000Date of Patent: March 4, 2003Assignee: Telemaze, Inc.Inventors: Margaret Susan Asprey, Samuel F. Wood, Jerry A. Klein
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Patent number: 6526082Abstract: 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: GrantFiled: June 2, 2000Date of Patent: February 25, 2003Assignee: Lumileds Lighting U.S., LLCInventors: Scott W. Corzine, Richard P. Schneider, Jr., Ghulam Hasnain
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Patent number: 6518079Abstract: 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: GrantFiled: December 20, 2000Date of Patent: February 11, 2003Assignee: Lumileds Lighting, U.S., LLCInventor: William R. Imler
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Patent number: 6504301Abstract: 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: GrantFiled: September 3, 1999Date of Patent: January 7, 2003Assignee: LumiLeds Lighting, U.S., LLCInventor: Christopher H. Lowery