Patents Examined by Luz Alejandro
  • Patent number: 8741097
    Abstract: A plasma processing apparatus includes a processing chamber including a dielectric window; a coil-shaped RF antenna, provided outside the dielectric window; a substrate supporting unit provided in the processing chamber; a processing gas supply unit; an RF power supply unit for supplying an RF power to the RF antenna to generate a plasma of the processing gas by an inductive coupling in the processing chamber, the RF power having an appropriate frequency for RF discharge of the processing gas; a correction coil, provided at a position outside the processing chamber where the correction coil is to be coupled with the RF antenna by an electromagnetic induction, for controlling a plasma density distribution on the substrate in the processing chamber; a switching device provided in a loop of the correction coil; and a switching control unit for on-off controlling the switching device at a desired duty ratio by pulse width modulation.
    Type: Grant
    Filed: October 27, 2010
    Date of Patent: June 3, 2014
    Assignee: Tokyo Electron Limited
    Inventors: Yohei Yamazawa, Chishio Koshimizu, Masashi Saito, Kazuki Denpoh, Jun Yamawaku
  • Patent number: 8691048
    Abstract: A plasma technique in which a plasma generation technique frequently used in various fields including a semiconductor manufacturing process is used, and generation of plasma instability (high-speed impedance change of a plasma) can efficiently be suppressed and controlled in order to manufacture stable products. An apparatus includes a processing chamber, a surrounding member disposed around the processing chamber, an RF induction coil disposed outside the dielectric member, and an air-core coil for generating a direct-current magnetic field supplied to the inner space. The surrounding member seals an opening on top of the processing chamber to create an inner space, and the RF induction coil is above the top surface of the surrounding member.
    Type: Grant
    Filed: June 8, 2012
    Date of Patent: April 8, 2014
    Assignee: Lam Research Corporation
    Inventors: Takumasa Nishida, Shu Nakajima
  • Patent number: 8662010
    Abstract: A plasma film deposition apparatus (plasma processing apparatus) includes a second antenna 11b disposed around an antenna 11a and located outwardly of a ceiling surface. The second antenna 11b is supplied with an electric current flowing in a direction opposite to the direction of an electric current supplied to the antenna 11a by a power supply. Lines of magnetic force F2, heading in a direction opposite to the direction of lines of magnetic force F1 appearing at the site of the antenna 11a, are thereby generated at the site of the second antenna 11b. Thus, the magnetic flux density in the direction of the wall surface is lowered, even when a uniform plasma is generated over a wide range within a tubular container 2.
    Type: Grant
    Filed: May 4, 2007
    Date of Patent: March 4, 2014
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventors: Ryuichi Matsuda, Tadashi Shimazu, Masahiko Inoue
  • Patent number: 8641862
    Abstract: Plasma is generated using elemental hydrogen, a weak oxidizing agent, and a fluorine containing gas. An inert gas is introduced to the plasma downstream of the plasma source and upstream of a showerhead that directs gas mixture into the reaction chamber where the mixture reacts with the high-dose implant resist. The process removes both the crust and bulk resist layers at a high strip rate, and leaves the work piece surface substantially residue free with low silicon loss.
    Type: Grant
    Filed: May 2, 2012
    Date of Patent: February 4, 2014
    Assignee: Novellus Systems, Inc.
    Inventors: Haruhiro Harry Goto, David Cheung
  • Patent number: 8623171
    Abstract: A plasma processing apparatus includes a process chamber, a platen positioned in the process chamber for supporting a workpiece, a source configured to generate a plasma in the process chamber having a plasma sheath adjacent to the front surface of the workpiece, and an insulating modifier. The insulting modifier is configured to control a shape of a boundary between the plasma and the plasma sheath so a portion of the shape of the boundary is not parallel to a plane defined by a front surface of the workpiece facing the plasma. Controlling the shape of the boundary between the plasma and the plasma sheath enables a large range of incident angles of particles striking the workpiece to be achieved.
    Type: Grant
    Filed: April 3, 2009
    Date of Patent: January 7, 2014
    Assignee: Varian Semiconductor Equipment Associates, Inc.
    Inventors: Ludovic Godet, Timothy J. Miller, Christopher J. Leavitt, Bernard G. Lindsay
  • Patent number: 8613828
    Abstract: The present invention concerns a procedure for the production of a plasma that is at least co-produced in the vacuum chamber (1a) of a vacuum recipient (1) of a device suitable for plasma processing with at least one induction coil (2) carrying an alternating current, where the gas used to produce the plasma is fed into the vacuum chamber (1a) through at least one inlet (3) and the vacuum chamber (1a) is subject to the pumping action of at least one pump arrangement (4), and where a possibly pulsed direct current is also applied to the induction coil (2) in order to influence the plasma density.
    Type: Grant
    Filed: December 4, 2008
    Date of Patent: December 24, 2013
    Assignee: OC Oerlikon Balzers AG
    Inventors: Jürgen Weichart, Dominik Wimo Amman, Siegfried Krassnitzer
  • Patent number: 8608903
    Abstract: A plasma processing apparatus includes: a processing chamber including a dielectric window; a coil-shaped RF antenna, provided outside the dielectric window; a substrate supporting unit, provided in the chamber, for mounting thereon a target substrate; a processing gas supply unit for supplying a processing gas to the chamber; and an RF power supply unit for supplying an RF power to the RF antenna to generate a plasma of the processing gas by an inductive coupling in the chamber. The apparatus further includes a correction coil, provided at a position outside the chamber where the correction coil is to be coupled with the RF antenna by an electromagnetic induction, for controlling a plasma density distribution in the chamber; and an antenna-coil distance control unit for controlling a distance between the RF antenna and the correction coil while supporting the correction coil substantially in parallel with the RF antenna.
    Type: Grant
    Filed: October 27, 2010
    Date of Patent: December 17, 2013
    Assignee: Tokyo Electron Limited
    Inventors: Yohei Yamazawa, Chishio Koshimizu, Masashi Saito, Kazuki Denpoh, Jun Yamawaku, Hachishiro Iizuka
  • Patent number: 8608902
    Abstract: A vertical plasma processing apparatus for performing a plasma process on a plurality of target objects together at a time includes an activation mechanism configured to turn a process gas into plasma. The activation mechanism includes a vertically elongated plasma generation box attached to a process container at a position corresponding to a process field and confining a plasma generation area airtightly communicating with the process field, an ICP electrode disposed outside the plasma generation box and extending in a longitudinal direction of the plasma generation box, and an RF power supply connected to the ICP electrode. The ICP electrode includes a separated portion separated from a wall surface of the plasma generation box by a predetermined distance.
    Type: Grant
    Filed: January 12, 2010
    Date of Patent: December 17, 2013
    Assignee: Tokyo Electron Limited
    Inventors: Kohei Fukushima, Toshiki Takahashi, Hiroyuki Matsuura, Yutaka Motoyama, Kazuya Yamamoto
  • Patent number: 8597464
    Abstract: There is provided an inductively coupled plasma reactor. The inductively coupled plasma reactor is connected to a transformer with multiple magnetic cores and a primary winding, to transfer an electromotive force for plasma discharge to a plasma discharge chamber of a reactor body. Parts of magnetic core positioned in side the plasma discharge chamber are protected by being entirely covered by a core protecting tube. The primary winding is electrically connected to a power supply source providing radio frequency power. In the inductively coupled plasma reactor, since a number of magnetic core cross sectional parts are positioned inside the plasma discharge chamber, the efficiency of transferring the inductively coupled energy to be connected with plasma is very high.
    Type: Grant
    Filed: April 19, 2007
    Date of Patent: December 3, 2013
    Assignee: New Power Plasma Co., Ltd
    Inventor: Dae-Kyu Choi
  • Patent number: 8597463
    Abstract: An inductively coupled plasma processing apparatus includes a processing chamber for accommodating a target substrate to be processed and performing plasma processing thereon, a mounting table provided in the processing chamber for mounting thereon the target substrate, a processing gas supply system for supplying a processing gas into the processing chamber and a gas exhaust system for exhausting the inside of the processing chamber. Further, in the inductively coupled plasma processing apparatus, a high frequency antenna is provided to form an inductive electric field in the processing chamber and a first high frequency power supply is provided to supply a high frequency power to the high frequency antenna. A metal window made of a nonmagnetic and conductive material is formed between the high frequency antenna and the processing chamber while being insulated from a main body which forms the processing chamber.
    Type: Grant
    Filed: January 13, 2010
    Date of Patent: December 3, 2013
    Assignee: Tokyo Electron Limited
    Inventor: Kazuo Sasaki
  • Patent number: 8454794
    Abstract: An antenna includes excitation terminals responsive to an RF source to supply an RF electromagnetic field to a plasma that processes a workpiece in a vacuum chamber. The coil includes a transformer having a primary winding coupled to the excitation terminals and a multi-turn plasma excitation secondary winding connected in series with a capacitor.
    Type: Grant
    Filed: June 15, 2012
    Date of Patent: June 4, 2013
    Assignee: Lam Research Corporation
    Inventors: Arthur M. Howald, Andras Kuthi
  • Patent number: 8419893
    Abstract: A shielded lid heater lid heater suitable for use with a plasma processing chamber, a plasma processing chamber having a shielded lid heater and a method for plasma processing are provided. The method and apparatus enhances positional control of plasma location within a plasma processing chamber, and may be utilized in etch, deposition, implant, and thermal processing systems, among other applications where the control of plasma location is desirable. In one embodiment, a shielded lid heater is provided that includes an aluminum base and RF shield sandwiching a heater element.
    Type: Grant
    Filed: March 20, 2009
    Date of Patent: April 16, 2013
    Assignee: Applied Materials, Inc.
    Inventors: Michael D. Willwerth, David Palagashvili, Valentin N. Todorow, Stephen Yuen
  • Patent number: 7381292
    Abstract: An inductively coupled plasma (ICP) generating apparatus includes an evacuated reaction chamber, an antenna installed at an upper portion of the reaction chamber to induce an electric field for ionizing reaction gas supplied into the reaction chamber and generating plasma, and an radio frequency (RF) power source connected to the antenna to apply radio frequency power to the antenna, wherein the antenna has a plurality of coils having different radiuses, at least one of the coils being a serpentine coil bent in a zigzag pattern. Capacitors are connected between the RF power source and a matching network and between the matching network and the antenna, in parallel with the antenna, to induce a LC resonance phenomenon. With the ICP generating apparatus having the above structure, it is possible to reduce antenna inductance, suppress capacitive coupling, and improve plasma uniformity. It is also possible to discharge and sustain plasma efficiently using the LC resonance phenomenon.
    Type: Grant
    Filed: October 15, 2003
    Date of Patent: June 3, 2008
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Young-dong Lee, Yuri Nikolaevich Tolmachev, Seong-gu Kim, Jai-kwang Shin
  • Patent number: 7374636
    Abstract: A method and apparatus for controlling a magnetic field gradient within a magnetically enhanced plasma reactor. The apparatus comprises a cathode pedestal supporting a wafer within an enclosure, a plurality of electromagnets positioned proximate the enclosure for producing a magnetic field in the enclosure and a magnetic field control element, positioned proximate the electromagnets, for controlling the magnetic field proximate a specific region of the wafer.
    Type: Grant
    Filed: July 26, 2002
    Date of Patent: May 20, 2008
    Assignee: Applied Materials, Inc.
    Inventors: Keiji Horioka, Chun Yan, Taeho Shin, Roger Alan Lindley, Panyin Hughes, Douglas H. Burns, Evans Y. Lee, Bryan Y. Pu, Qi Li, Mahmoud Dahimene
  • Patent number: 7354501
    Abstract: The present invention is directed to an upper chamber design of a plasma CVD chamber which provides more uniform conditions for forming thin CVD films on a substrate. Embodiments of the invention improve temperature control of the upper chamber and improve particle performance by reducing or minimizing the temperature fluctuations on the dome between the deposition and non-deposition cycles. In accordance with an aspect of the present invention, an apparatus for processing semiconductor substrates comprises a chamber defining a plasma processing region therein. The chamber includes a bottom, a side wall, and a dome disposed on top of the side wall. The dome has a substantially flat dome top. A top RF coil is disposed above the dome top, and has an outer loop which is larger in size than the substrates to be processed in the chamber. A cold plate is disposed above the top RF coil, and is larger in size than the substrates to be processed in the chamber.
    Type: Grant
    Filed: May 17, 2002
    Date of Patent: April 8, 2008
    Assignee: Applied Materials, Inc.
    Inventors: Sudhir Gondhalekar, Tom K. Cho, Rolf Guenther, Steve H. Kim, Mehrdad Moshfegh, Shigeru Takehiro, Thomas Kring, Tetsuya Ishikawa
  • Patent number: 7338577
    Abstract: An inductively coupled plasma processing apparatus for a large area processing, the inductively coupled plasma processing apparatus comprising: a reaction chamber; a plurality of linear antennas horizontally arranged at an inner upper portion of the reaction chamber while being spaced from each other by a predetermined distance for receiving induced RF power, the linear antennas being coupled to each other at an outer portion of the reaction chamber, the linear antennas including at least one bending antenna formed by connecting first ends of adjacent antennas, which are exposed to the outer portion of the reaction chamber, to each other; and at least one magnet positioned adjacent to the linear antennas for creating a magnetic field perpendicularly crossing an electric field created by the linear antennas in such a manner that electrons perform a spiral movement.
    Type: Grant
    Filed: May 15, 2003
    Date of Patent: March 4, 2008
    Assignee: Sungkyukwan University
    Inventors: Geun-Young Yeom, Young-Joon Lee, Kyong-Nam Kim
  • Patent number: 7316199
    Abstract: A magnetic field generator for producing a magnetic field that accelerates plasma formation is placed proximate a reaction chamber of semiconductor substrate processing system. The magnetic field generator has four main magnetic coil sections for producing a magnetic field nearly parallel to the top surface of a support pedestal in the reaction chamber and four sub-magnetic coil sections placed generally coaxially with the main magnetic coil sections to produce a magnetic field of the direction opposite of that of the magnetic field produced with the main magnetic coil sections. In the magnetic field generator, magnetic fields of opposite polarities are superimposed on each other when electric currents of opposite directions are applied to the main and sub-magnetic coil sections.
    Type: Grant
    Filed: May 14, 2002
    Date of Patent: January 8, 2008
    Assignee: Applied Materials, Inc.
    Inventors: Keiji Horioka, Chun Yan, Taeho Shin, Roger Alan Lindley, Qi Li, Panyin Hughes, Douglas H. Burns, Evans Y. Lee, Bryan Y. Pu
  • Patent number: 7314525
    Abstract: A plasma CVD apparatus comprises a reaction container for allowing a reaction for forming a thin film on a semiconductor wafer to be performed, a bias electrode which applies a high frequency bias for sputtering to the semiconductor wafer, a nozzle which supplies SiH4 gas including at least hydrogen into the reaction container, and a control circuit which on/off-controls the high frequency bias through a switch and which on/off-controls the supply of SiH4 gas through a flow rate controller based on an opposite control logic to a high frequency bias control logic.
    Type: Grant
    Filed: July 24, 2002
    Date of Patent: January 1, 2008
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventors: Tadashi Shimazu, Masahiko Inoue
  • Patent number: 7255775
    Abstract: There is provided a semiconductor wafer treatment member in which the occurrence of slippage thereof is prevented and which has an adequate cohesiveness onto the semiconductor wafer and an excellent durability. The semiconductor wafer treatment member A of the present invention has at least a surface formed with a silicon carbide (SiC) film thereon, comprising a support portion for receiving a semiconductor wafer, said support portion being composed of salients with which said semiconductor wafer substantially comes into contact; and depressions formed with the silicon carbide (SiC) film to provide a coverage area between said salients, said salients being formed with top surfaces having a surface roughness Ra of 0.05 ?m to 1.3 ?m.
    Type: Grant
    Filed: June 26, 2003
    Date of Patent: August 14, 2007
    Assignee: Toshiba Ceramics Co., Ltd.
    Inventors: Masanari Yokogawa, Hirotaka Hagihara, Shinya Wagatsuma, Koutarou Kitayama, Chieko Fujiwara
  • Patent number: 7255774
    Abstract: A processing system for processing a substrate with a plasma comprises a processing chamber defining a processing space for containing a substrate to be processed with a plasma formed within the chamber. A dielectric window interfaces with the processing chamber proximate the processing space. A core element formed of a material having a high magnetic permeability is positioned outside of the chamber proximate the dielectric window, and an electrically conductive element surrounds a portion of the core element of high magnetic permeability. The conductive element, when electrical current is conducted thereby, is operable for coupling a magnetic flux into the chamber through the dielectric window for affecting a plasma in the processing space. The core element is configured for directing a portion of the magnetic flux in a direction toward the dielectric window to efficiently couple the channeled flux into the processing chamber through the dielectric window.
    Type: Grant
    Filed: September 26, 2002
    Date of Patent: August 14, 2007
    Assignee: Tokyo Electron Limited
    Inventors: Mirko Vukovic, Edward L. Sill