Patents Examined by Rakesh K Dhingra
  • Patent number: 7544269
    Abstract: A plasma processing system including a plasma chamber (120) having a substrate holder (128) and a monitoring system (130). The monitoring system (130) includes a microwave mirror (140) having a concave surface (142) located opposite the holder (128) and a power source (160) is coupled thereto that produces a microwave signal perpendicular to a wafer plane (129) of the holder (128). A detector (170) is coupled to the mirror (140) and measures a vacuum resonance voltage of the signal within the chamber (120). A control system (180) is provided that measures a first voltage during a vacuum condition and a second voltage during a plasma condition and determines an electron density from a difference between the second voltage and the first voltage. The processing system (110) can include a plurality of monitoring systems (130a, 130b, 130c) having mirrors (140a, 140b, 140c) provided in a spatial array located opposite the substrate holder (128).
    Type: Grant
    Filed: October 24, 2002
    Date of Patent: June 9, 2009
    Assignee: Tokyo Electron Limited
    Inventor: Eric J. Strang
  • Patent number: 7527016
    Abstract: An apparatus, which performs a plasma process on a target substrate by using plasma, includes first and second electrodes in a process chamber to oppose each other. An RF field, which turns a process gas into plasma by excitation, is formed between the first and second electrodes. An RF power supply, which supplies RF power, is connected to the first or second electrode through a matching circuit. The matching circuit automatically performs input impedance matching relative to the RF power. A variable impedance setting section is connected to a predetermined member, which is electrically coupled with the plasma, through an interconnection. The impedance setting section sets a backward-direction impedance against an RF component input to the predetermined member from the plasma. A controller supplies a control signal concerning a preset value of the backward-direction impedance to the impedance setting section.
    Type: Grant
    Filed: July 10, 2003
    Date of Patent: May 5, 2009
    Assignee: Tokyo Electron Limited
    Inventors: Yohei Yamazawa, Manabu Iwata, Chishio Koshimizu, Fumihiko Higuchi, Akitaka Shimizu, Asao Yamashita, Nobuhiro Iwama, Tsutomu Higashiura, Dongsheng Zhang, Michiko Nakaya, Norikazu Murakami
  • Patent number: 7527706
    Abstract: According to the present invention, with an object of minimizing damage to a dielectric plate and a metal vessel and improving efficiency of plasma processing, a resin layer is disposed in an area where the dielectric plate and the process vessel face each other. This can reduce particles and damage ascribable to a difference in thermal expansion coefficient between the dielectric plate and the metal process vessel. Moreover, the occurrence of local discharge in an electric field boundary such as an edge portion of the dielectric plate is inhibited, resulting in improved efficiency of plasma processing such as film deposition of an oxide film.
    Type: Grant
    Filed: April 8, 2005
    Date of Patent: May 5, 2009
    Assignee: Tokyo Electron Limited
    Inventor: Osamu Morita
  • Patent number: 7520956
    Abstract: An on-wafer monitoring system is placed at a position of a substrate to be treated in a plasma treatment device. The on-wafer monitoring system includes various sensors, a data I/O unit for optically inputting/outputting data to/from outside, and an internal power source unit for supplying power to them. The on-wafer data I/O unit is connected to a laser diode (LD) and a photo diode (PD) which are optical I/O units installed outside. The data I/O unit receives an instruction from outside and transmits monitored data to outside. Sensors arranged on the substrate are an ion energy analyzer, a VUV photon detector, and a radical ion species emission spectrophotometer.
    Type: Grant
    Filed: February 3, 2003
    Date of Patent: April 21, 2009
    Assignee: Tohoku Techno Arch Co., Ltd.
    Inventors: Seiji Samukawa, Tadashi Shinmura, Mitsuru Okigawa
  • Patent number: 7520244
    Abstract: A plasma treatment apparatus for thin-film deposition includes a reactor chamber; a pair of parallel-plate electrodes disposed inside the chamber; and a radio-frequency power supply system used for transmitting radio-frequency power to one of the parallel-plate electrodes via multiple supply points provided on the one of the parallel-electrodes. The radio-frequency power supply system includes a radio-frequency transmission unit which includes an inlet transmission path and multiple branches branched off from the inlet transmission path multiple times. Each branch is connected to the supply point and has a substantially equal characteristic impedance value.
    Type: Grant
    Filed: March 23, 2004
    Date of Patent: April 21, 2009
    Assignee: ASM Japan K.K.
    Inventors: Takayuki Yamagishi, Hiroki Arai, Kiyoshi Satoh
  • Patent number: 7513954
    Abstract: A plasma processing apparatus includes a processing container for receiving a substrate to be processed and processing the substrate by a plasma of a processing gas, a substrate mounting table, installed in the processing container, for mounting the substrate thereon, and a gas supplying unit for supplying the processing gas into the processing container. Here, the substrate mounting table includes a mounting table main body formed of an insulator component. Here, an electrode is embedded inside the mounting table main body, a high frequency power supply for supplying a high frequency power is connected to the electrode, and one or more exposed electrodes are installed to be exposed toward the outside of the mounting table main body and electrically connected to the electrode in the mounting table main body.
    Type: Grant
    Filed: July 24, 2002
    Date of Patent: April 7, 2009
    Assignee: Tokyo Electron Limited
    Inventors: Hachishiro Iizuka, Taro Ikeda
  • Patent number: 7506609
    Abstract: In an arrangement for generating a local electron-cyclotron-microwave-low pressure plasma at a certain location within a gas-filled process chamber, a microwave supply means providing a microwave beam and a plasma localization unit generating a magnetic field are provided such that the magnetic field and the microwave beam intersect each other in the process chamber. The microwaves are uncoupled onto a concave reflection structure from the focal point thereof so that the microwave beam generated is essentially parallel. An arrangement for generating a magnetic field is movable along the microwave beam axis so that a cross volume between the microwave beam and the magnetic field can be moved along the beam axis whereby the conditions for electron cyclotron resonance are adjustable by displacement of the magnetic field.
    Type: Grant
    Filed: May 17, 2004
    Date of Patent: March 24, 2009
    Assignee: Forschungszentrum Karlsruhe GmbH
    Inventors: Sven Ulrich, Michael Stüber, Harald Leiste, Lorenz Niederberger, Konrad Sell, Martina Lattemann, Roland Loos
  • Patent number: 7485204
    Abstract: An ECR plasma source of the invention is constructed of: a plasma generating chamber (10) having a generally rectangular section in a plane normal to a plasma flow; magnetic coils (20, 21) wound in generally rectangular shapes in a plane normal to the plasma flow; and a direct introduction type or branching and binding introduction type waveguide (30) or microwave cavity resonator. Microwaves are transmitted into the plasma generating chamber (10) from a plurality of openings (34) which are formed in such side faces in the waveguide (30) or the microwave cavity resonator as correspond to in-phase microwave portions. Moreover, an ECR plasma device comprises the aforementioned ECR plasma source and a sample moving mechanism for moving a large-sized sample.
    Type: Grant
    Filed: April 9, 2003
    Date of Patent: February 3, 2009
    Assignee: MES AFTY Corporation
    Inventors: Seitaro Matsuo, Toshiyuki Nozaki, Fumio Tanaka
  • Patent number: 7478609
    Abstract: A plasma processing apparatus and a processing apparatus having a widened process condition range allowing plasma generation are obtained by increasing microwave propagation efficiency. The plasma processing apparatus includes a processing chamber where plasma processing is performed, and microwave introducer for introducing microwaves into the processing chamber. The microwave introducer includes a dielectric member transmitting the microwaves. The dielectric member has a shape in cross section in a direction approximately perpendicular to a transmitting direction of the microwaves through the dielectric member that allows transmission of the microwaves of substantially a single mode. The dielectric member has a thickness T in the transmitting direction that satisfies a condition of (?×(2m+0.7)/4)?T?(?×(2m+1.3)/4), where ? is a wavelength of the microwaves of the single mode transmitted through the dielectric member and m is an arbitrary integer.
    Type: Grant
    Filed: October 11, 2002
    Date of Patent: January 20, 2009
    Assignees: Sharp Kabushiki Kaisha, Tadahiro OHMI
    Inventors: Naoko Yamamoto, I'atsushi Yamamoto, Masaki Hirayama, I'adahiro Ohmi
  • Patent number: 7449071
    Abstract: A wafer holder for supporting a wafer within a CVD processing chamber includes a vertically moveable lift ring configured to support the bottom peripheral surface of the wafer, and an inner plug having a top flat surface configured to support the wafer during wafer processing. The lift ring has a central aperture configured to closely surround the inner plug. When a wafer is to be loaded onto the wafer holder, the lift ring is elevated above the inner plug. The wafer is loaded onto the lift ring in the elevated position. Then, the lift ring is maintained in the elevated position for a time period sufficient to allow the wafer temperature to rise to a level that is sufficient to significantly reduce or even substantially prevent thermal shock to the wafer when the wafer is brought into contact with the inner plug. The lift ring is then lowered into surrounding engagement with the inner plug. This is the wafer processing position of the wafer holder.
    Type: Grant
    Filed: July 30, 2004
    Date of Patent: November 11, 2008
    Assignee: ASM America, Inc.
    Inventors: Ravinder K. Aggarwal, Tony J. Keeton, Matthew G. Goodman
  • Patent number: 7441513
    Abstract: An apparatus for plasma polymerize coating of medical devices, such as stents, is disclosed. A method for forming plasma-polymerized coating for implantable medical devices is also disclosed.
    Type: Grant
    Filed: September 26, 2003
    Date of Patent: October 28, 2008
    Assignee: Advanced Cardiovascular Systems, Inc.
    Inventors: Shamim M. Malik, Charles D. Claude, Connie S. Kwok, Michael Seegmiller
  • Patent number: 7442273
    Abstract: A hybrid coupled plasma type apparatus includes: a chamber having a gas-injecting unit; an electrostatic chuck in the chamber; an insulating plate over the gas-injecting unit; a high frequency generator; an impedance matching circuit connected to the high frequency generator; first and second antennas connected to the impedance matching circuit in parallel, a power of the high frequency generator being supplied to the first and second antennas; an electrode of a plate shape connected to one of the first and second antennas in serial, the power of the high frequency generator being supplied to the electrode; and a power distributor between the high frequency generator and one of the first and second antennas.
    Type: Grant
    Filed: July 14, 2004
    Date of Patent: October 28, 2008
    Assignee: Jusung Engineering Co., Ltd.
    Inventors: Gi-Chung Kwon, Hong-Young Chang, Yong-Kwan Lee
  • Patent number: 7442272
    Abstract: An apparatus for improving the density and uniformity of plasma in the manufacture of a semiconductor device features a plasma chamber having a complex geometry that causes plasma density to be increased at the periphery or edge of a semiconductor wafer being processed, thereby compensating for a plasma density that is typically more concentrated at the center of the semiconductor wafer. By mounting a target semiconductor wafer in a chamber region that has a cross-sectional area that is smaller than a cross-sectional area of a plasma source chamber region, a predetermine flow of generated plasma from the source becomes concentrated as it moves toward the semiconductor wafer, particularly at the periphery of the semiconductor wafer. This provides a more uniform plasma density across the entire surface of the target semiconductor wafer than has heretofore been available.
    Type: Grant
    Filed: June 25, 2004
    Date of Patent: October 28, 2008
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Jeong-sic Jeon, Jin Hong
  • Patent number: 7442275
    Abstract: In many processes used in fabricating semiconductors the wafer is seated on the top surface of a pedestal and heated in a high energy process step, such as plasma etching. The pedestal, chuck or platen may be cooling but the wafer gradually heats until the process can no longer continue. Where large, e.g. 300 mm diameter, wafers are being processed the temperature level across the wafer is difficult to maintain substantially constant. In this system and method the lateral temperature distribution is equalized by a heat sink structure in a chamber immediately under the wafer support on top of the pedestal. A number of spatially distributed wicking posts extend downwardly from a layer of wicking material across the top of the chamber, into a pool of a vaporizable liquid. At hot spots, vaporized liquid is generated and transported to adjacent condensation posts extending up from the liquid. The system thus passively extracts heat to equalize temperatures while recirculating liquid and assuring adequate supply.
    Type: Grant
    Filed: February 22, 2006
    Date of Patent: October 28, 2008
    Assignee: Advanced Thermal Sciences
    Inventor: Kenneth W. Cowans
  • Patent number: 7434537
    Abstract: An apparatus for coating objects having a single microwave source, two or more coating chambers, and an impedance structure or a waveguide structure. The coating chambers are connected to the single microwave source. The impedance structure or waveguide structure divides the microwave energy in order to generate plasmas in the coating chambers.
    Type: Grant
    Filed: August 7, 2002
    Date of Patent: October 14, 2008
    Assignee: Schott AG
    Inventors: Stephan Behle, Lars Bewig, Thomas Küpper, Wolfram Maring, Christoph Mölle, Marten Walther
  • Patent number: 7430985
    Abstract: Plasma processing equipment capable of increasing the heat resistance of a wave guide by using a high dielectric material, comprising a processing container 44 formed to allow vacuuming, a loading table 46 installed in the processing container for placing a processed body W thereon, a microwave transmission plate 72 installed in an opening part at the ceiling of the processing container, a flat antenna member 76 for feeding microwave into the processing container through the microwave transmission plate, a shield cover body 80 earthed so as to cover the upper part of the flat antenna member, and a waveguide 90 for feeding the microwave from a microwave generating source to the flat antenna member, characterized in that the waveguide is formed of a high dielectric waveguide 94 using the high dielectric material, whereby the heat resistance of the waveguide can be increased.
    Type: Grant
    Filed: January 27, 2003
    Date of Patent: October 7, 2008
    Assignee: Tokyo Electron Limited
    Inventor: Shigeru Kasai
  • Patent number: 7431772
    Abstract: A gas distributor distributes a gas across a surface of a substrate processing chamber. The gas distributor has a hub, a baffle extending radially outward from the hub, a first set of vanes and a second set of vanes. In one version, the hub has a gas inlet and a gas outlet. The baffle has an opposing first and second surfaces. First vanes are on the first surface of the baffle and direct gas across chamber surfaces. In one version, the first vanes comprise arcuate plates that curve and taper outward from the hub. Second vanes are on the second surface of the baffle and direct gas across the second surface of the baffle. In one version, a gas feed-through tube in the hub can allow a gas to bypass the first and second set of vanes.
    Type: Grant
    Filed: March 9, 2004
    Date of Patent: October 7, 2008
    Assignee: Applied Materials, Inc.
    Inventors: Laxman Murugesh, Padmanabhan Krishnaraj, Carl Dunham
  • Patent number: 7426900
    Abstract: An integrated electrostatic inductively-coupled (i-ESIC) device is provided for plasma processing that may be used as a primary or secondary source for generating a plasma to prepare substrates for, and to process substrates by applying, dielectric and conductive coatings. The i-ESIC device is practical for processing advanced semiconductor devices and integrated circuits that require uniform and dense plasma. The invention may be embodied in an apparatus that contains a substrate support, typically including an electrostatic chuck, that controls ion energy by capacitively coupling RF power to the plasma and generating voltage bias on the wafer relative to the plasma potential. An integrated inductive coupling element is provided at the perimeter of the substrate support that increases plasma density at the perimeter of the wafer, compensating for the radial loss of charged particles toward chamber walls, to produce uniform plasma density above the processed wafer.
    Type: Grant
    Filed: November 19, 2003
    Date of Patent: September 23, 2008
    Assignee: Tokyo Electron Limited
    Inventor: Jozef Brcka
  • Patent number: 7422653
    Abstract: A vacuum chamber having a gate valve including a chamber housing defining an internal vacuum region and first and second openings through the chamber housing and a gate valve secured to the chamber housing. The gate valve includes a sealing door located in the processing region and configured to seal the first opening in the chamber housing; a vertical actuator located outside the chamber housing; a one-sided horizontal actuator located within the processing region and connected to the sealing door; and a valve shaft extending through the second opening in the chamber housing and connecting the vertical actuator to the one-sided horizontal actuator.
    Type: Grant
    Filed: July 13, 2004
    Date of Patent: September 9, 2008
    Assignee: Applied Materials, Inc.
    Inventors: Jeff Blahnik, Joe Kraus, Mike Rice
  • Patent number: 7422637
    Abstract: An apparatus and method for performing uniform gas flow in a processing chamber is provided. In one embodiment, an apparatus is an edge ring that includes an annular body having an annular seal projecting therefrom is provided. The seal is coupled to a side of the annular body opposite a side adapted to seat on the substrate support. In another embodiment, a processing system is provided that includes a chamber body, a lid, a substrate support and a plurality of flow control orifices. The lid is disposed on the chamber body and defining an interior volume therewith. The substrate support is disposed in the interior volume and at least partially defines a processing region with the lid. The flow control orifices are disposed between the substrate support and the lid. The flow control orifices are adapted to control flow of gases exiting the processing region.
    Type: Grant
    Filed: October 25, 2006
    Date of Patent: September 9, 2008
    Assignee: Applied Materials, Inc.
    Inventors: Vincent Ku, Ling Chen, Howard Grunes, Hua Chung