Patents by Inventor Evans Y. Lee
Evans Y. Lee has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
-
Patent number: 7374636Abstract: 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: GrantFiled: July 26, 2002Date of Patent: May 20, 2008Assignee: 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: 7316199Abstract: 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: GrantFiled: May 14, 2002Date of Patent: January 8, 2008Assignee: 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: 7147719Abstract: In a substrate vacuum processing chamber, a second inner slit passage door apparatus and method to supplement the normal slit valve and its door at the outside of the chamber. The inner slit passage door, blocks the slit passage at or adjacent the substrate processing location in a vacuum processing chamber to prevent process byproducts from depositing on the inner surfaces of the slit passage beyond the slit passage door and improves the uniformity of plasma in the processing chamber by eliminating a large cavity adjacent to the substrate processing location into which the plasma would otherwise expand.Type: GrantFiled: June 23, 2003Date of Patent: December 12, 2006Assignee: Applied Materials, Inc.Inventors: Michael D. Welch, Homgqing Shan, Paul E. Luscher, Evans Y. Lee, James D. Carducci, Siamak Salimian
-
Patent number: 6916399Abstract: The present invention provides a temperature controlled energy transparent window or electrode used to advantage in a substrate processing system. The invention also provides methods associated with controlling lid temperature during processing and for controlling etching processes. In a preferred embodiment the invention provides a fluid supply system for the lid which allows the fluid to flow through a feedthrough and into and out of a channel formed in the window or electrode. The fluid supply system may also mount the window or electrode to a retaining ring which secures the window or electrode to the chamber. In another aspect the invention provides a bonded window or electrode having a first and second plate having a channel formed in the plates so that when the plates are bonded together they form a channel therein through which a temperature controlling fluid can be flowed. An external control system preferably regulates the temperature of the fluid.Type: GrantFiled: June 3, 1999Date of Patent: July 12, 2005Inventors: Yan Rozenzon, Gil Lavi, Evans Y. Lee, Dong Ho Choi, Matt Hamrah, Paul E. Luscher, Kaushik Vaidya, Bryan Pu, Richard Fovell
-
Patent number: 6863835Abstract: A plasma chamber apparatus and method employing a magnet system to block the plasma within the chamber interior from reaching the exhaust pump. An exhaust channel between the chamber interior and the pump includes a magnet and at least one deflector that creates turbulence in the flow of exhaust gases. The magnetic field and the turbulence produced by the deflector both increase the rate of recombination of charged particles in the gases, thereby reducing the concentration of charged particles sufficiently to quench the plasma downstream of the magnet and deflector, thereby preventing the plasma body within the chamber from reaching the exhaust pump. The plasma confinement effect of the magnetic field permits the use of a wider and/or less sinuous exhaust channel than would be required to block the plasma without the magnetic field.Type: GrantFiled: April 25, 2000Date of Patent: March 8, 2005Inventors: James D. Carducci, Hamid Noorbakhsh, Evans Y. Lee, Hongqing Shan, Siamak Salimian, Paul E. Luscher, Michael D. Welch
-
Patent number: 6797639Abstract: A capacitively coupled reactor for plasma etch processing of substrates at subatmospheric pressures includes a chamber body defining a processing volume, a lid provided upon the chamber body, the lid being a first electrode, a substrate support provided in the processing volume and comprising a second electrode, a radio frequency source coupled at least to one of the first and second electrodes, a process gas inlet configured to deliver process gas into the processing volume, and an evacuation pump system having pumping capacity of at least 1600 liters/minute. The greater pumping capacity controls residency time of the process gases so as to regulate the degree of dissociation into more reactive species.Type: GrantFiled: September 24, 2002Date of Patent: September 28, 2004Assignee: Applied Materials Inc.Inventors: James D Carducci, Hamid Noorbakhsh, Evans Y Lee, Bryan Y Pu, Hongching Shan, Claes Bjorkman, Siamak Salimian, Paul E Luscher, Michael D Welch
-
Patent number: 6773544Abstract: The invention concerns a plasma reactor employing a chamber enclosure including a process gas inlet and defining a plasma processing region. A workpiece support pedestal capable of supporting a workpiece at processing location faces the plasma processing region, the pedestal and enclosure being spaced from one another to define a pumping annulus therebetween having facing walls in order to permit the process of gas to be evacuated therethrough from the process region. A pair of opposing plasma confinement magnetic poles within one of the facing walls of the annulus, the opposing magnetic poles being axially displaced from one another. The magnetic poles are axially displaced below the processing location by a distance which exceeds a substantial fraction of a spacing between the facing walls of the annulus.Type: GrantFiled: January 31, 2001Date of Patent: August 10, 2004Inventors: James D. Carducci, Hamid Noorbakhsh, Evans Y. Lee, Hongqing Shan, Siamak Salimian, Paul E. Luscher, Michael D. Welch
-
Publication number: 20040083978Abstract: In a substrate vacuum processing chamber, a second inner slit passage door apparatus and method to supplement the normal slit valve and its door at the outside of the chamber. The inner slit passage door, blocks the slit passage at or adjacent the substrate processing location in a vacuum processing chamber to prevent process byproducts from depositing on the inner surfaces of the slit passage beyond the slit passage door and improves the uniformity of plasma in the processing chamber by eliminating a large cavity adjacent to the substrate processing location into which the plasma would otherwise expand.Type: ApplicationFiled: June 23, 2003Publication date: May 6, 2004Applicant: Applied Materials, Inc.Inventors: Michael D. Welch, Homgqing Shan, Paul E. Luscher, Evans Y Lee, James D. Carducci, Siamak Salimian
-
Patent number: 6716302Abstract: A capacitively coupled reactor for plasma etch processing of substrates at subatmospheric pressures includes a chamber body defining a processing volume, a lid provided upon the chamber body, the lid being a first electrode, a substrate support provided in the processing volume and comprising a second electrode, a radio frequency source coupled at least to one of the first and second electrodes, a process gas inlet configured to deliver process gas into the processing volume, and an evacuation pump system having pumping capacity of at least 1600 liters/minute. The greater pumping capacity controls residency time of the process gases so as to regulate the degree of dissociation into more reactive species.Type: GrantFiled: September 24, 2002Date of Patent: April 6, 2004Assignee: Applied Materials Inc.Inventors: James D Carducci, Hamid Noorbakhsh, Evans Y Lee, Bryan Y Pu, Hongching Shan, Claes Bjorkman, Siamak Salimian, Paul E Luscher, Michael D Welch
-
Patent number: 6647918Abstract: In a substrate vacuum processing chamber, a second inner slit passage door apparatus and method to supplement the normal slit valve and its door at the outside of the chamber. The inner slit passage door, blocks the slit passage at or adjacent the substrate processing location in a vacuum processing chamber to prevent process byproducts from depositing on the inner surfaces of the slit passage beyond the slit passage door and improves the uniformity of plasma in the processing chamber by eliminating a large cavity adjacent to the substrate processing location into which the plasma would otherwise expand.Type: GrantFiled: November 13, 2000Date of Patent: November 18, 2003Assignee: Applied Materials, IncInventors: Michael D. Welch, Homgqing Shan, Paul E. Luscher, Evans Y. Lee, James D. Carducci, Siamak Salimian
-
Publication number: 20030085000Abstract: 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: ApplicationFiled: May 14, 2002Publication date: May 8, 2003Applicant: 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
-
Publication number: 20030037880Abstract: A capacitively coupled reactor for plasma etch processing of substrates at subatmospheric pressures includes a chamber body defining a processing volume, a lid provided upon the chamber body, the lid being a first electrode, a substrate support provided in the processing volume and comprising a second electrode, a radio frequency source coupled at least to one of the first and second electrodes, a process gas inlet configured to deliver process gas into the processing volume, and an evacuation pump system having pumping capacity of at least 1600 liters/minute. The greater pumping capacity controls residency time of the process gases so as to regulate the degree of dissociation into more reactive species.Type: ApplicationFiled: September 24, 2002Publication date: February 27, 2003Applicant: Applied Materials, Inc.Inventors: James D. Carducci, Hamid Noorbakhsh, Evans Y. Lee, Bryan Y. Pu, Hongching Shan, Claes Bjorkman, Siamak Salimian, Paul E. Luscher, Michael D. Welch
-
Publication number: 20030038111Abstract: A capacitively coupled reactor for plasma etch processing of substrates at subatmospheric pressures includes a chamber body defining a processing volume, a lid provided upon the chamber body, the lid being a first electrode, a substrate support provided in the processing volume and comprising a second electrode, a radio frequency source coupled at least to one of the first and second electrodes, a process gas inlet configured to deliver process gas into the processing volume, and an evacuation pump system having pumping capacity of at least 1600 liters/minute. The greater pumping capacity controls residency time of the process gases so as to regulate the degree of dissociation into more reactive species.Type: ApplicationFiled: September 24, 2002Publication date: February 27, 2003Applicant: Applied Materials, Inc.Inventors: James D. Carducci, Hamid Noorbakhsh, Evans Y. Lee, Bryan Y. Pu, Hongqing Shan, Claes Bjorkman, Siamak Salimian, Paul E. Luscher, Michael D. Welch
-
Patent number: 6513452Abstract: A method of adjusting the cathode DC bias in a plasma chamber for fabricating semiconductor devices. A dielectric shield is positioned between the plasma and a selected portion of the electrically grounded components of the chamber, such as the electrically grounded chamber wall. The cathode DC bias is adjusted by controlling one or more of the following parameters: (1) the surface area of the chamber wall or other grounded components which is blocked by the dielectric shield; (2) the thickness of the dielectric; (3) the gap between the shield and the chamber wall; and (4) the dielectric constant of the dielectric material. In an apparatus aspect, the invention is a plasma chamber for fabricating semiconductor devices having an exhaust baffle with a number of sinuous passages. Each passage is sufficiently long and sinuous that no portion of the plasma within the chamber can extend beyond the outlet of the passage.Type: GrantFiled: April 24, 2001Date of Patent: February 4, 2003Assignee: Applied Materials Inc.Inventors: Hongching Shan, Evans Y. Lee, Michael D. Welch, Robert W. Wu, Bryan Y. Pu, Paul E. Luscher, James D. Carducci, Richard Blume
-
Publication number: 20030006008Abstract: 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: ApplicationFiled: July 26, 2002Publication date: January 9, 2003Applicant: 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
-
Publication number: 20010032590Abstract: The invention concerns a plasma reactor employing a chamber enclosure including a process gas inlet and defining a plasma processing region. A workpiece support pedestal capable of supporting a workpiece at processing location faces the plasma processing region, the pedestal and enclosure being spaced from one another to define a pumping annulus therebetween having facing walls in order to permit the process of gas to be evacuated therethrough from the process region. A pair of opposing plasma confinement magnetic poles within one of the facing walls of the annulus, the opposing magnetic poles being axially displaced from one another. The magnetic poles are axially displaced below the processing location by a distance which exceeds a substantial fraction of a spacing between the facing walls of the annulus.Type: ApplicationFiled: January 31, 2001Publication date: October 25, 2001Applicant: Applied Materials, Inc.Inventors: James D. Carducci, Hamid Noorbakhsh, Evans Y. Lee, Hongqing Shan, Siamak Salimian, Paul E. Luscher, Michael D. Welch
-
Publication number: 20010032591Abstract: The invention is a plasma reactor employing a chamber having a process gas inlet and enclosing a plasma process region. The reactor includes a workpiece support pedestal within the chamber capable of supporting a workpiece at a processing location interfacing with the plasma process region, the support pedestal and the chamber defining an annulus therebetween to permit gas to be evacuated therethrough from the plasma process region. One aspect of the invention includes a ring horseshoe magnet adjacent and about one side of the annulus, the magnet being spaced from the plasma processing location by a spacing substantially greater than the smallest distance across the annulus. The invention further includes the magnet defining opposite poles which are substantially closer together than the spacing of the magnet from the processing location, the magnet being oriented to provide its maximum magnetic flux across the annulus and a minimum of the flux at the plasma processing location.Type: ApplicationFiled: January 31, 2001Publication date: October 25, 2001Applicant: Applied Materials, Inc.Inventors: James D. Carducci, Hamid Noorbakhsh, Evans Y. Lee, Hongqing Shan, Siamak Salimian, Paul E. Luscher, Michael D. Welch
-
Publication number: 20010014540Abstract: A method of adjusting the cathode DC bias in a plasma chamber for fabricating semiconductor devices. A dielectric shield is positioned between the plasma and a selected portion of the electrically grounded components of the chamber, such as the electrically grounded chamber wall. The cathode DC bias is adjusted by controlling one or more of the following parameters: (1) the surface area of the chamber wall or other grounded components which is blocked by the dielectric shield; (2) the thickness of the dielectric; (3) the gap between the shield and the chamber wall; and (4) the dielectric constant of the dielectric material. In an apparatus aspect, the invention is a plasma chamber for fabricating semiconductor devices having an exhaust baffle with a number of sinuous passages. Each passage is sufficiently long and sinuous that no portion of the plasma within the chamber can extend beyond the outlet of the passage.Type: ApplicationFiled: April 24, 2001Publication date: August 16, 2001Applicant: Applied Materials, Inc.Inventors: Hongching Shan, Evans Y. Lee, Michael D. Welch, Robert W. Wu, Bryan Y. Pu, Paul E. Luscher, James D. Carducci, Richard Blume
-
Patent number: 6221782Abstract: A method of adjusting the cathode DC bias in a plasma chamber for fabricating semiconductor devices. A dielectric shield is positioned between the plasma and a selected portion of the electrically grounded components of the chamber, such as the electrically grounded chamber wall. The cathode DC bias is adjusted by controlling one or more of the following parameters: (1) the surface area of the chamber wall or other grounded components which is blocked by the dielectric shield; (2) the thickness of the dielectric; (3) the gap between the shield and the chamber wall; and (4) the dielectric constant of the dielectric material. In an apparatus aspect, the invention is a plasma chamber for fabricating semiconductor devices having an exhaust baffle with a number of sinuous passages. Each passage is sufficiently long and sinuous that no portion of the plasma within the chamber can extend beyond the outlet of the passage.Type: GrantFiled: April 6, 1999Date of Patent: April 24, 2001Assignee: Applied Materials, Inc.Inventors: Hongching Shan, Evans Y. Lee, Michael D. Welch, Robert W. Wu, Bryan Y. Pu, Paul E. Luscher, James D. Carducci, Richard Blume
-
Patent number: 6192827Abstract: In a substrate vacuum processing chamber, a second inner slit passage door apparatus and method to supplement the normal slit valve and its door at the outside of the chamber. The inner slit passage door, blocks the slit passage at or adjacent the substrate processing location in a vacuum processing chamber to prevent process byproducts from depositing on the inner surfaces of the slit passage beyond the slit passage door and improves the uniformity of plasma in the processing chamber by eliminating a large cavity adjacent to the substrate processing location into which the plasma would otherwise expand.Type: GrantFiled: July 3, 1998Date of Patent: February 27, 2001Assignee: Applied Materials, Inc.Inventors: Michael D. Welch, Homgqing Shan, Paul E. Luscher, Evans Y. Lee, James D. Carducci, Siamak Salimian