Patents Examined by Gregory Mills
  • Patent number: 6743297
    Abstract: A rotary substrate processing apparatus includes a rotor 1 having a holding member for holding a plurality of semiconductor wafers W arranged at appropriate intervals and a motor 4 for rotating the rotor 1. The holding member includes open/close holding rods 3 that are moved to open or close the rotor 1 in inserting the wafers W into the rotor 1 sideways and a plurality of constant-position holding rods 2a to 2d for holding the wafers W in cooperation with the open/close holding rods 3. Among the constant-position holding rods 2a to 2d, at least one constant-position holding rod 2a is equipped with a plurality of press members 5 which move toward respective peripheral portions of the wafers W by centrifugal force due to the rotation of the rotor 1. Consequently, it becomes possible to make the wafers W follow the rotation of the rotor 1 ensurely and also possible to reduce slip between the open/close holding rods 3, the constant-position holding rods 2a to 2d and the wafers W.
    Type: Grant
    Filed: May 21, 2002
    Date of Patent: June 1, 2004
    Assignee: Tokyo Electron Limited
    Inventors: Koji Egashira, Sadayuki Fujishima, Yuji Kamikawa
  • Patent number: 6740246
    Abstract: A method for making multi-layer electronic circuit boards 64 having “blind” type apertures 28, 30 which may be selectively and electrically grounded and further having selectively formed air bridges and/or crossover circuits 45, 46.
    Type: Grant
    Filed: April 17, 2001
    Date of Patent: May 25, 2004
    Assignee: Visteon Global Tech., Inc.
    Inventors: Andrew Zachary Glovatsky, Robert Edward Belke, Marc Alan Straub, Michael George Todd
  • Patent number: 6740166
    Abstract: A semiconductor thin film deposition apparatus having at least one reactor in which a wafer is received, a gas supply portion for supplying a reaction gas or inert gas to the reactor, and an exhaust pump for exhausting gas from the reactor, characterized in that the improvement comprises an ozone supply portion for generating ozone as a gas that reacts with the reaction gas, and for supplying the ozone to the reactor.
    Type: Grant
    Filed: November 30, 2000
    Date of Patent: May 25, 2004
    Assignee: IPS, Ltd.
    Inventor: Won-sung Choi
  • Patent number: 6740247
    Abstract: The invention provides HF vapor process conditions that can be precisely controlled with a high degree of reproducibility for a wide range of starting wafer conditions. These HF vapor processes for, e.g., etching oxide on a semiconductor substrate, cleaning a contaminant on a semiconductor substrate, removing etch residue from a metal structure on a semiconductor substrate, and cleaning a metal contact region of a semiconductor substrate. In the HF vapor process, a semiconductor substrate having oxide, a contaminant, metal etch residue, or a contact region to be processed is exposed to hydrofluoric acid vapor and water vapor in a process chamber held at temperature and pressure conditions that are controlled to form on the substrate no more than a sub-monolayer of etch reactants and products produced by the vapor as the substrate is processed by the vapor.
    Type: Grant
    Filed: February 4, 2000
    Date of Patent: May 25, 2004
    Assignee: Massachusetts Institute of Technology
    Inventors: Yong-Pil Han, Herbert H. Sawin
  • Patent number: 6740194
    Abstract: An apparatus and method for modifying the surface of an object by contacting said surface with a liquid processing solution using the liquid applicator geometry and Marangoni effect (surface tension gradient-driven flow) to define and confine the dimensions of the wetted zone on said object surface. In particular, the method and apparatus involve contouring or figuring the surface of an object using an etchant solution as the wetting fluid and using real-time metrology (e.g. interferometry) to control the placement and dwell time of this wetted zone locally on the surface of said object, thereby removing material from the surface of the object in a controlled manner. One demonstrated manifestation is in the deterministic optical figuring of thin glasses by wet chemical etching using a buffered hydrofluoric acid solution and Marangoni effect.
    Type: Grant
    Filed: January 24, 2003
    Date of Patent: May 25, 2004
    Assignee: The Regents of the University of California
    Inventors: Michael C. Rushford, Jerald A. Britten
  • Patent number: 6740167
    Abstract: A device for mounting a substrate includes a susceptor as a support for the substrate to be coated. The susceptor includes an insert whose surface is at least partly formed by a metal carbide layer of a predetermined thickness. The device for mounting the substrate eliminates a contamination of the substrate during processing, such as during production of an epitaxial layer on a wafer. A method for producing the insert includes the steps of producing a metallic preform, embedding the metallic preform in a carbon-containing powder, heating the metallic preform and the carbon-containing powder to an elevated temperature, hard processing the heat-treated preform and disposing the hard-processed preform on the susceptor as an insert.
    Type: Grant
    Filed: July 31, 2000
    Date of Patent: May 25, 2004
    Assignee: SICED Electronics Development GmbH & Co., KG
    Inventors: Roland Rupp, Arno Wiedenhofer
  • Patent number: 6736930
    Abstract: A microwave plasma processing apparatus prevents the component parts of a process chamber from being influenced by heat associated with plasma, thereby improving the quality of plasma processing performed in the process chamber. A wavelength reducing member reduces a wavelength of a microwave transmitted therethrough. A slot electrode guides the microwave exiting the wavelength reducing member, the slot electrode provided adjacent to the wavelength reducing member. A first temperature control device controls a temperature of at least one of the slot electrode and component parts including the wavelength reducing member provided in the vicinity of the slot electrode. The microwave exiting the slot electrode is introduced to the process chamber so that plasma is generated by the microwave within the process chamber.
    Type: Grant
    Filed: March 28, 2000
    Date of Patent: May 18, 2004
    Assignee: Tokyo Electron Limited
    Inventor: Toshiaki Hongoh
  • Patent number: 6736926
    Abstract: A system of cleaning a CMP pad used for removing copper from a substrate, the system comprising an abrasive cleaning pad, a cleaning solution delivery system that delivers a cleaning solution, an analyzing system that monitors the characteristics of the cleaning solution optically and chemically, and a carriage that allows the analyzing system to monitor the cleaning solution at a plurality of locations on the CMP pad. The use of the abrasive cleaning pad and the cleaning solution removes contaminants from the CMP pad, and the contaminants are dissolved in the cleaning solution. By measuring the concentration of contaminants in the cleaning solution, the condition of the CMP pad can be monitored. To measure the concentration of the contaminants, changes in the refractive index and absorption of light in the cleaning solution are measured, wherein the refractive index and absorption depend on the concentration of the contaminants.
    Type: Grant
    Filed: October 9, 2001
    Date of Patent: May 18, 2004
    Assignee: Micron Technology, Inc.
    Inventors: Dinesh Chopra, Scott Meikle
  • Patent number: 6733624
    Abstract: An apparatus for holding an object to be processed, according to this invention is mounted in a plasma processing apparatus and includes a convex-shaped holder main body, first dielectric film, and second dielectric film. The holder main body has a holding portion which holds an object to be processed placed on it and a flange formed on the peripheral portion of the holding portion to fit with a focus ring. The first dielectric film attracts the object to be processed placed on the holding portion to the holder main body by a Coulomb force. The second dielectric film attracts the focus ring fitted on the flange to the holder main body by an attracting force larger than that of the first dielectric film using a Johnson-Rahbek force. The electrostatic attracting force of the focus ring for the holder main body is increased, so that the cooling effect is increased.
    Type: Grant
    Filed: January 16, 2003
    Date of Patent: May 11, 2004
    Assignee: Tokyo Electron Limited
    Inventors: Akira Koshiishi, Shinji Himori
  • Patent number: 6733829
    Abstract: A deposition ring which has a cut out on its interior circumferential edge. The deposition ring is configured to contact an edge of an electrostatic chuck and shield at least a portion of the electrostatic chuck during a deposition process wherein material is deposited onto an item, such as a semiconductor wafer, which is disposed on the electrostatic chuck. The interior circumferential edge of the deposition ring includes a surface portion which is configured to engage the edge of the electrostatic chuck, and includes the cut out portion which is configured to be spaced away and not contact the edge of the electrostatic chuck during the deposition process. As such, the deposition ring does not tend to bind with the electrostatic chuck during the deposition process.
    Type: Grant
    Filed: March 19, 2002
    Date of Patent: May 11, 2004
    Assignee: LSI Logic Corporation
    Inventors: Dave Stacey, Jonathan Allinger, Allan Vescovi
  • Patent number: 6733848
    Abstract: A thin film forming equipment and a method for forming thin films are provided which are capable of forming the thin film of high quality and of effectively preventing CVD material gas from leaking to surroundings at a low cost. The thin film equipment contains a substrate, a substrate holding device used to hold the substrate and a device used to provide an atmospheric gas to a surface of the substrate held by the substrate holding device, wherein an upper face of the substrate held by the substrate holding device and an upper face of the substrate holding device are almost on one plane.
    Type: Grant
    Filed: November 21, 2001
    Date of Patent: May 11, 2004
    Assignee: NEC Corporation
    Inventors: Yukio Morishige, Makoto Omiya
  • Patent number: 6730175
    Abstract: A substrate support assembly for supporting a substrate during processing is provided. In one embodiment, a support assembly includes a ceramic body having an embedded heating element and a base plate. The base plate and the ceramic body define a channel therebetween adapted to supply purge gas to a perimeter of a substrate disposed on the support assembly. The base plate is fastened to the body by brazing, adhering, fastening, press fitting or by mating engaging portions of a retention device such as a bayonet fitting.
    Type: Grant
    Filed: January 22, 2002
    Date of Patent: May 4, 2004
    Assignee: Applied Materials, Inc.
    Inventors: Joseph Yudovsky, Salvador P. Umotoy, Shamouil Shamouilian, Ron Rose, Rita Dukes, Xiaoxiong Yuan
  • Patent number: 6730191
    Abstract: A polishing apparatus of a semiconductor wafer by a chemical-mechanical polishing method including a polishing platen having an upper surface on which a polishing pad is attached. The polishing platen is rotated in one direction along a central axis. A plurality of coaxial polishing-dressing head assemblies each having a lower surface opposed to an upper surface of the polishing pad on the polishing platen. Each of the coaxial assemblies holds a wafer to be polished while rotating along a central axis and pressing the rotating wafers on a radial portion of the rotating polishing pad. A polishing pad dressing ring is mounted coaxially encircling each of the wafer supporting heads. The applied compression on the wafer supporting heads pushes the wafer and the coaxially mounted dressing ring against the upper surface of the polishing pad therefore polishing each wafer while dressing the polishing pad.
    Type: Grant
    Filed: June 25, 2001
    Date of Patent: May 4, 2004
    Assignee: Vanguard International Semiconductor Corporation
    Inventor: Randy (C. H.) Chang
  • Patent number: 6726533
    Abstract: In a method for polishing leads of a semiconductor package, a plurality of semiconductor packages is arranged in a certain manner. Then, the leads are automatically polished. The semiconductor packages may be masked to expose at least a part of the leads to be polished.
    Type: Grant
    Filed: November 28, 2001
    Date of Patent: April 27, 2004
    Assignee: Oki Electric Industry Co., Ltd.
    Inventor: Takeyuki Sato
  • Patent number: 6723202
    Abstract: A plasma etching apparatus includes a worktable disposed in a hermetic process chamber. The worktable has a main surface for placing a wafer thereon, and a sub-surface for placing a focus ring thereon. A cooling mechanism for supplying cold to the main surface and sub-surface is disposed in the worktable. A heat transfer medium made of conductive silicone rubber is interposed between the sub-surface and focus ring. A press mechanism presses the focus ring toward the sub-surface. The heat transfer medium improves thermal conductivity between the sub-surface and focus ring to be higher than in a case with no thermal transfer medium.
    Type: Grant
    Filed: April 24, 2001
    Date of Patent: April 20, 2004
    Assignee: Tokyo Electron Limited
    Inventors: Toshifumi Nagaiwa, Shuei Sekizawa, Kosuke Imafuku, Jun Ooyabu
  • Patent number: 6723201
    Abstract: A microchip fabrication chamber has a pedestal adapted to retain a wafer during processing steps conducted within the chamber. A lift mechanism including a plurality of lift mechanism pins engages and disengages a wafer to the pedestal. A sensor associated with the tip of at least one of the lift mechanism pins detects the presence of the wafer.
    Type: Grant
    Filed: February 21, 2002
    Date of Patent: April 20, 2004
    Assignee: Taiwan Semiconductor Manufacturing Co., Ltd.
    Inventors: Wen-Ming Chen, Wen-Chi Wang
  • Patent number: 6719849
    Abstract: A single-substrate-processing apparatus includes an airtight process chamber, in which a worktable is supported by a pedestal. A conduction structure is arranged to conduct static electricity generated on the worktable and a wafer thereon to a grounded portion outside the process chamber. The conduction structure has a conductive film formed on insulating surfaces of the worktable and the pedestal.
    Type: Grant
    Filed: May 16, 2001
    Date of Patent: April 13, 2004
    Assignee: Tokyo Electron Limited
    Inventors: Takahiro Horiguchi, Naofumi Oda
  • Patent number: 6716299
    Abstract: An invention is provided for a retaining ring for use in a chemical mechanical planarization system. The retaining ring includes an annular retaining ring capable of holding a flatted wafer in position during a CMP operation. The flatted wafer has a first corner and a second corner disposed on a flatted edge of the wafer. Also included is a plurality of profiled teeth disposed along an interior surface of the annular retaining ring. The profiled teeth are separated from each other such that the first comer and the second corner of the wafer do not contact profiled teeth simultaneously at all orientations of the wafer in the retaining ring. In addition, a surface of each tooth that contacts the wafer is inclined so as to form an angle greater than 90° relative to a polishing surface and away from the center of the wafer.
    Type: Grant
    Filed: June 28, 2002
    Date of Patent: April 6, 2004
    Assignee: Lam Research Corporation
    Inventors: Yehiel Gotkis, Aleksander Owczarz, Jeffrey Yung
  • Patent number: 6716301
    Abstract: A semiconductor manufacturing apparatus includes a unit for generating a plasma in a vacuum chamber, a wafer stage for holding a semiconductor wafer introduced into the vacuum chamber, a high frequency power supply for applying a high frequency voltage to the wafer stage, a wafer voltage probe for measuring a voltage of the semiconductor wafer at a rear surface of the semiconductor wafer, a current and voltage probe for measuring at least one of a voltage and a current applied to the wafer stage from the high frequency power supply, and a control portion. The control portion obtains an impedance from the semiconductor wafer to earth through the plasma on the basis of a voltage value of the semiconductor wafer measured by the wafer voltage probe, and a voltage value or a current value measured by the current and voltage probe, and performs a processing based on the obtained impedance.
    Type: Grant
    Filed: March 7, 2001
    Date of Patent: April 6, 2004
    Assignee: Hitachi, Ltd.
    Inventors: Seiichiro Kanno, Ryoji Nishio, Tsutomu Tetsuka, Junichi Tanaka, Hideyuki Yamamoto, Kazuyuki Ikenaga, Saburou Kanai
  • Patent number: 6716298
    Abstract: A tank is set up to hold a precise volume of acid by first adjusting an overflow pipe to establish a volume that is larger than the desired volume and then adjusting the vertical position of a volume occupying element that extends above and below the surface of the acid. The apparatus includes a drain pipe for directing the acid to a tank that holds deionized water that the acid is mixed with. The bath is used for etching a silicon dioxide layer on a semiconductor wafer.
    Type: Grant
    Filed: September 27, 2002
    Date of Patent: April 6, 2004
    Assignee: Chartered Semiconductor Manufacturing Ltd.
    Inventor: Kam Beng Chong