Patents by Inventor Eric J. Strang
Eric J. Strang 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).
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Publication number: 20080083723Abstract: A substrate holder for supporting a substrate in a processing system includes a temperature controlled support base having a first temperature, and a substrate support opposing the temperature controlled support base and configured to support the substrate. Also included is one or more heating elements coupled to the substrate support and configured to heat the substrate support to a second temperature above the first temperature, and a thermal insulator disposed between the temperature controlled support base and the substrate support. The thermal insulator includes a non-uniform spatial variation of the heat transfer coefficient (W/m2-K) through the thermal insulator between the temperature controlled support base and the substrate support.Type: ApplicationFiled: September 25, 2006Publication date: April 10, 2008Applicant: TOKYO ELECTRON LIMITEDInventors: Yuji Tsukamoto, Eric J. Strang
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Patent number: 7353141Abstract: A method for monitoring consumption of a component, including the steps of emitting a radiation beam onto a first area of the component and detecting a portion of the radiation beam that is refracted by the component. A radiation level signal is generated based at least on a strength of the detected portion of the radiation beam, and a thickness of the component is determined based on the radiation level signal. The thickness of the component is compared to a predetermined thickness value, and a status signal is generated when the comparing step determines that the thickness of the component is substantially equal to or below the predetermined thickness value. When the comparing step determines that the thickness of the component is greater than the predetermined thickness value, the component is exposed to a process that can erode at least a portion of the component.Type: GrantFiled: April 18, 2007Date of Patent: April 1, 2008Assignee: Tokyo Electron LimitedInventors: Andrej S. Mitrovic, Eric J. Strang
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Patent number: 7347901Abstract: A thermally zoned substrate holder including a substantially cylindrical base having top and bottom surfaces configured to support a substrate. A plurality of temperature control elements are disposed within the base. An insulator thermally separates the temperature control elements. The insulator is made from an insulting material having a lower coefficient of thermal conductivity than the base (e.g., a gas-or vacuum-filled chamber).Type: GrantFiled: November 26, 2003Date of Patent: March 25, 2008Assignee: Tokyo Electron LimitedInventors: Steven T. Fink, Eric J. Strang
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Publication number: 20070298972Abstract: A dry non-plasma treatment system and method for removing oxide material is described. The treatment system is configured to provide chemical treatment of one or more substrates, wherein each substrate is exposed to a gaseous chemistry, including HF and optionally NH3, under controlled conditions including source temperature and gas pressure. Furthermore, the treatment system is configured to provide thermal treatment of each substrate, wherein each substrate is thermally treated to remove the chemically treated surfaces on each substrate.Type: ApplicationFiled: June 22, 2006Publication date: December 27, 2007Applicant: TOKYO ELECTRON LIMITEDInventors: MARTIN KENT, Eric J. Strang
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Patent number: 7311782Abstract: A method and an apparatus utilized for thermal processing of substrates during semiconductor manufacturing. The method includes heating the substrate to a predetermined temperature using a heating assembly, cooling the substrate to the predetermined temperature using a cooling assembly located such that a thermal conductance region is provided between the heating and cooling assemblies, and adjusting a thermal conductance of the thermal conductance region to aid in heating and cooling of the substrate. The apparatus includes a heating assembly, a cooling assembly located such that a thermal conductance region is provided between the heating and cooling assemblies, and a structure or configuration for adjusting a thermal conductance of the thermal conductance region.Type: GrantFiled: April 12, 2005Date of Patent: December 25, 2007Assignee: Tokyo Electron LimitedInventors: Eric J. Strang, Wayne L. Johnson
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Patent number: 7263447Abstract: An equipment status monitoring system and method of operating thereof is described. The equipment status monitoring system includes at least one microwave mirror in a plasma processing chamber forming a multi-modal resonator. A power source is coupled to a mirror and configured to produce an excitation signal extending along an axis generally perpendicular to a substrate. A detector is coupled to a mirror and configured to measure an excitation signal. A control system is connected to the detector that compares a measured excitation signal to a normal excitation signal in order to determine a status of the material processing equipment.Type: GrantFiled: January 30, 2003Date of Patent: August 28, 2007Assignee: Tokyo Electron LimitedInventor: Eric J. Strang
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Patent number: 7260500Abstract: An equipment status monitoring system having at least one multi-modal resonator included as a part of a semiconductor processing system and a power source coupled to the at least one multi-modal resonator. The power source is configured to produce a microwave excitation signal corresponding to at least one mode of the multi-modal resonator and emit the microwave excitation signal into the semiconductor processing chamber. The system includes a detector coupled to the at least one multi-modal resonator and configured to measure the excitation signal. The system includes a control system connected to the detector and configured to provide a comparison of at least one measured excitation signal with a normal excitation signal corresponding to a normal status.Type: GrantFiled: January 30, 2003Date of Patent: August 21, 2007Assignee: Tokyo Electron LimitedInventor: Eric J. Strang
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Patent number: 7233878Abstract: A method for monitoring consumption of a component, including the steps of emitting a radiation beam onto a first area of the component and detecting a portion of the radiation beam that is refracted by the component. A radiation level signal is generated based at least on a strength of the detected portion of the radiation beam, and a thickness of the component is determined based on the radiation level signal. The thickness of the component is compared to a predetermined thickness value, and a status signal is generated when the comparing step determines that the thickness of the component is substantially equal to or below the predetermined thickness value. When the comparing step determines that the thickness of the component is greater than the predetermined thickness value, the component is exposed to a process that can erode at least a portion of the component.Type: GrantFiled: January 30, 2004Date of Patent: June 19, 2007Assignee: Tokyo Electron LimitedInventors: Andrej S. Mitrovic, Eric J. Strang
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Patent number: 7217336Abstract: A method and system (1) for utilizing shaped orifices (e.g., sonic and simple orifices, and divergent nozzles) in the gas inject system (20) as part of a plasma process system. By utilizing the shaped orifices, directionality of gas flow (25) can be improved. This improvement is especially beneficial in high aspect ratio processing.Type: GrantFiled: June 20, 2002Date of Patent: May 15, 2007Assignee: Tokyo Electron LimitedInventor: Eric J. Strang
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Patent number: 7214289Abstract: A wall film monitoring system includes first and second microwave mirrors in a plasma processing chamber each having a concave surface. The concave surface of the second mirror is oriented opposite the concave surface of the first mirror. A power source is coupled to the first mirror and configured to produce a microwave signal. A detector is coupled to at least one of the first mirror and the second mirror and configured to measure a vacuum resonance voltage of the microwave signal. A control system is connected to the detector that compares a first measured voltage and a second measured voltage and determines whether the second voltage exceeds a threshold value. A method of monitoring wall film in a plasma chamber includes loading a wafer in the chamber, setting a frequency of a microwave signal output to a resonance frequency, and measuring a first vacuum resonance voltage of the microwave signal.Type: GrantFiled: October 24, 2002Date of Patent: May 8, 2007Assignee: Tokyo Electron LimitedInventors: Eric J. Strang, Richard Parsons
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Patent number: 7199328Abstract: A plasma processing system including a process chamber, a substrate holder provided within the process chamber, and a gas injection system configured to supply a first gas and a second gas to the process chamber. The system includes a controller that controls the gas injection system to continuously flow a first gas flow to the process chamber and to pulse a second gas flow to the process chamber at a first time. The controller pulses a RF power to the substrate holder at a second time. A method of operating a plasma processing system is provided that includes adjusting a background pressure in a process chamber, where the background pressure is established by flowing a first gas flow using a gas injection system, and igniting a processing plasma in the process chamber. The method includes pulsing a second gas flow using the gas injection system at a first time, and pulsing a RF power to a substrate holder at a second time.Type: GrantFiled: August 29, 2002Date of Patent: April 3, 2007Assignee: Tokyo Electron LimitedInventor: Eric J. Strang
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Patent number: 7177781Abstract: The present invention provides a diagnostic system for plasma processing, wherein the diagnostic system comprises a multi-modal resonator, a power source, a detector, and a controller. The controller is coupled to the power source and the detector and it is configured to provide a man-machine interface for performing several monitoring and controlling functions associated with the diagnostic system including: a Gunn diode voltage monitor, a Gunn diode current monitor, a varactor diode voltage monitor, a detector voltage monitor, a varactor voltage control, a varactor voltage sweep control, a resonance lock-on control, a graphical user control, and an electron density monitor. The diagnostic system can further provide a remote controller coupled to the controller and configured to provide a remote man-machine interface. The remote man-machine interface. The remote man-machine interface can provide a graphical user interface in order to permit remote control of the diagnostic system by an operator.Type: GrantFiled: July 23, 2003Date of Patent: February 13, 2007Assignee: Tokyo Electron LimitedInventors: Eric J. Strang, Richard Parsons, Jody Goldfield
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Patent number: 7166233Abstract: In a method for performing a plasma-assisted treatment on a substrate in a reactor chamber by: introducing at least one process gas into the reactor chamber; and creating a plasma within the reactor chamber by establishing an RF electromagnetic field within the chamber and allowing the field to interact with the process gas, the electromagnetic field is controlled to have an energy level which varies cyclically between at least two values each sufficient to maintain the plasma, such that each energy level value is associated with performance of a respectively different treatment process on the substrate.Type: GrantFiled: February 15, 2002Date of Patent: January 23, 2007Assignee: Tokyo Electron LimitedInventors: Wayne L. Johnson, Eric J. Strang
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Patent number: 7164236Abstract: A method and apparatus for generating and controlling a plasma (130) formed in a capacitively coupled plasma system (100) having a plasma electrode (140) and a bias electrode in the form of a workpiece support member (170), wherein the plasma electrode is unitary and has multiple regions (Ri) defined by a plurality of RF power feed lines (156) and the RF power delivered thereto. The electrode regions may also be defined as electrode segments (420) separated by insulators (426). A set of process parameters A={n, ?i, ?i, Pi, S; Li} is defined; wherein n is the number of RF feed lines connected to the electrode upper surface at locations Li, ?i is the on-time of the RF power for the ith RF feed line, ?i is the phase of the ith RF feed line relative to a select one of the other RF feed lines, Pi is the RF power delivered to the electrode through the ith RF feed line at location Li, and S is the sequencing of RF power to the electrode through the RF feed lines.Type: GrantFiled: March 5, 2004Date of Patent: January 16, 2007Assignee: Tokyo Electron LimitedInventors: Andrej S. Mitrovic, Eric J. Strang, Murray D. Sirkis, Bill H. Quon, Richard Parsons, Yuji Tsukamoto
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Patent number: 7108751Abstract: A plasma processing device comprising a gas injection system is described, wherein the gas injection system comprises a gas injection assembly body, a consumable gas inject plate coupled to the gas injection assembly body, and a pressure sensor coupled to a gas injection plenum formed by the gas injection system body and the consumable gas inject plate. The gas injection system is configured to receive a process gas from at least one mass flow controller and distribute the process gas to the processing region within the plasma processing device, and the pressure sensor is configured to measure a gas injection pressure within the gas injection plenum. A controller, coupled to the pressure sensor, is configured to receive a signal from the pressure sensor and to determine a state of the consumable gas inject plate based upon the signal.Type: GrantFiled: December 19, 2003Date of Patent: September 19, 2006Assignee: Tokyo Electron LimitedInventor: Eric J. Strang
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Patent number: 7103443Abstract: A method and system for utilizing a gas injection plate comprising a number of shaped orifices (e.g., sonic and simple orifices, and divergent nozzles) in the gas inject system as part of a plasma processing system. By utilizing the shaped orifices, directionality of gas flow can be improved. This improvement is especially beneficial in high aspect ratio processing.Type: GrantFiled: June 20, 2002Date of Patent: September 5, 2006Assignee: Tokyo Electron LimitedInventor: Eric J. Strang
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Patent number: 7075031Abstract: A method of and a structure for controlling the temperature of an electrode (4). The electrode is heated prior to etching the first wafer and both a (temporally) stationary and a (spatially) homogeneous temperature of the silicon electrode are maintained. Resistive heater elements (1) are either embedded within the housing of the electrode (3) or formed as part of the electrode. The resistive heater elements form a heater of a multi-zone type in order to minimize the temperature non-uniformity. The resistive heater elements are divided into a plurality of zones, wherein the power to each zone can be adjusted individually, allowing the desirable temperature uniformity of the electrode to be achieved. Preheating the electrode to the appropriate operating temperature eliminates both the “first wafer effect” and non-uniform etching of a semiconductor wafer.Type: GrantFiled: October 24, 2001Date of Patent: July 11, 2006Assignee: Tokyo Electron LimitedInventors: Eric J. Strang, Andrej Mitrovic, Jim Fordemwalt, Wayne L. Johnson
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Patent number: 7019253Abstract: Apparatus including a chamber and a coil system for converting a field-generating current into a RF magnetic field in the chamber when the chamber contains an ionized gas which interacts with the RF magnetic field to create a plasma. The plasma is contained within a cylindrical region enclosed by the chamber, which region has a longitudinal center axis, and the region is considered to be made up of a plurality of annular zones concentric with the center axis and disposed at respectively different distances from the center axis. The coil system is composed of: a plurality of individual coils each positioned and dimensioned to produce a RF magnetic field which predominantly influences a respective annular zone.Type: GrantFiled: August 28, 2002Date of Patent: March 28, 2006Assignee: Tokyo Electron LimitedInventors: Wayne L. Johnson, Thomas H. Windhorn, Eric J. Strang
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Patent number: 6960887Abstract: A plasma reactor or vacuum processing apparatus is provided with an orifice plate assembly. The orifice plate assembly includes an upper plate and a lower plate. Each plate is configured with through holes. The upper and lower orifice plates are independently rotatable with respect to each other. The plates are arranged within the vacuum chamber a discharge reactor such that the chuck assembly is disposed within an opening in the orifice plate assembly. The orifice plate assembly is further configured to have a perimeter shape that substantially matches the interior wall shape of vacuum chamber.Type: GrantFiled: February 7, 2003Date of Patent: November 1, 2005Assignee: Tokyo Electron LimitedInventors: Eric J. Strang, Wayne L. Johnson, Robert G. Hostetler, Steven T. Fink
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Patent number: 6954077Abstract: An equipment status monitoring system (10) and method of operating includes first (40) and second (50) microwave mirrors in a plasma processing chamber (20) each forming a multi-modal resonator. A power source (60) is coupled to the first mirror (40) and configured to produce an excitation signal. A detector (70) is coupled to at least one of the first mirror (40) and the second mirror (50) and configured to measure an excitation signal. At least one of the power source (60) and the detector (70) is coupled to a divergent aperture (44).Type: GrantFiled: January 31, 2003Date of Patent: October 11, 2005Assignee: Tokyo Electron LimitedInventor: Eric J. Strang