Patents by Inventor Sean Kellogg
Sean Kellogg 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: 20210183608Abstract: Apparatuses and methods for an optical induced ion source are disclosed herein. An example apparatus at least includes an ionization volume arranged to receive a gas and first optical energy, the first optical energy to ionize the gas, and a channel formed between a first membrane and a second membrane, the first membrane having at least a transparent portion and the second membrane including an aperture, where the gas is provided to the ionization volume through the channel, the ionization volume formed inside the channel and adjacent to the aperture, and where the first optical energy ionizes the gas after passing through the at least transparent portion of the first membrane.Type: ApplicationFiled: December 17, 2019Publication date: June 17, 2021Applicant: FEI CompanyInventors: Kun LIU, Gregory A. SCHWIND, Sean KELLOGG, Jorge FILEVICH
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Patent number: 10325750Abstract: A collision ionization source is disclosed herein. An example source includes an ionization region arranged to receive a gas and a charged particle beam, the charged particle beam to ionize at least some of the gas, and a supply duct arranged to provide the gas to the ionization region, the supply duct having a non-uniform height decreasing from an input orifice to an output orifice, the output orifice arranged adjacent to the ionization region.Type: GrantFiled: January 18, 2018Date of Patent: June 18, 2019Assignee: FEI COMPANYInventors: Gregory A. Schwind, Aurelien Philippe Jean Maclou Botman, Sean Kellogg, Leon van Kouwen, Luigi Mele
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Publication number: 20180211807Abstract: A collision ionization source is disclosed herein. An example source includes an ionization region arranged to receive a gas and a charged particle beam, the charged particle beam to ionize at least some of the gas, and a supply duct arranged to provide the gas to the ionization region, the supply duct having a non-uniform height decreasing from an input orifice to an output orifice, the output orifice arranged adjacent to the ionization region.Type: ApplicationFiled: January 18, 2018Publication date: July 26, 2018Applicant: FEI CompanyInventors: Gregory A. Schwind, Aurelien Philippe Jean Maclou Botman, Sean Kellogg, Leon van Kouwen, Luigi Mele
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Patent number: 9899181Abstract: A collision ionization ion source comprising: A pair of stacked plates, sandwiched about an intervening gap; An input zone (aperture), provided in a first of said plates, to admit an input beam of charged particles to said gap; An output zone (aperture), located opposite said input zone and provided in the second of said plates, to allow emission of a flux of ions from said gap; A gas space, between said input and output zones, in which gas can be ionized by said input beam so as to produce said ions; A supply duct in said gap, for supplying a flow of said gas to said gas space, and comprising: An emergence orifice, opening into said gas space; An entrance orifice, connectable to a gas supply, wherein said duct comprises at least one transition region between said entrance orifice and said emergence orifice in which an inner height of said duct, measured normal to the plates, decreases from a first height value to a second height value.Type: GrantFiled: January 12, 2017Date of Patent: February 20, 2018Assignee: FEI CompanyInventors: Gregory A. Schwind, Aurelien Philippe Jean Maclou Botman, Sean Kellogg, Leon van Kouwen, Luigi Mele
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Patent number: 9691583Abstract: Applicants have found that energetic neutral particles created by a charged exchange interaction between high energy ions and neutral gas molecules reach the sample in a ion beam system using a plasma source. The energetic neutral create secondary electrons away from the beam impact point. Methods to solve the problem include differentially pumped chambers below the plasma source to reduce the opportunity for the ions to interact with gas.Type: GrantFiled: July 7, 2015Date of Patent: June 27, 2017Assignee: FEI CompanyInventors: Thomas G. Miller, Sean Kellogg, Shouyin Zhang, Mostafa Maazouz, Anthony Graupera
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Patent number: 9591735Abstract: An inductively-coupled plasma source for a focused charged particle beam system includes a plasma chamber and a fluid that is not actively pumped surrounding the plasma chamber for providing high voltage isolation between the plasma chamber and nearby parts which are at ground potential, such as a conductive shield. One or more cooling devices cool the plasma chamber by using evaporative cooling and heat pipes to dissipate the heat from the plasma chamber into a surrounding environment.Type: GrantFiled: June 21, 2012Date of Patent: March 7, 2017Assignee: FEI COMPANYInventors: Sean Kellogg, Andrew B. Wells, James B. McGinn, N. William Parker, Mark W. Utlaut
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Patent number: 9530625Abstract: An inductively coupled plasma charged particle source for focused ion beam systems includes a plasma reaction chamber with a removably attached source electrode. A fastening mechanism connects the source electrode with the plasma reaction chamber and allows for a heat-conductive, vacuum seal to form. With a removable source electrode, improved serviceability and reuse of the plasma source tube are now possible.Type: GrantFiled: June 9, 2015Date of Patent: December 27, 2016Assignee: FEI COMPANYInventors: Sean Kellogg, Anthony Graupera, William N. Parker, Andrew B. Wells, Mark W. Utlaut, Walter Skoczylas, Gregory A. Schwind, Noel Smith, Shouyin Zhang
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Publication number: 20150380204Abstract: Applicants have found that energetic neutral particles created by a charged exchange interaction between high energy ions and neutral gas molecules reach the sample in a ion beam system using a plasma source. The energetic neutral create secondary electrons away from the beam impact point. Methods to solve the problem include differentially pumped chambers below the plasma source to reduce the opportunity for the ions to interact with gas.Type: ApplicationFiled: July 7, 2015Publication date: December 31, 2015Inventors: Thomas G. Miller, Sean Kellogg, Shouyin Zhang, Mostafa Maazouz, Anthony Graupera
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Publication number: 20150357166Abstract: An inductively coupled plasma charged particle source for focused ion beam systems includes a plasma reaction chamber with a removably attached source electrode. A fastening mechanism connects the source electrode with the plasma reaction chamber and allows for a heat-conductive, vacuum seal to form. With a removable source electrode, improved serviceability and reuse of the plasma source tube are now possible.Type: ApplicationFiled: June 9, 2015Publication date: December 10, 2015Applicant: FEI CompanyInventors: Sean Kellogg, Anthony Graupera, William N. Parker, Andrew B. Wells, Mark W. Utlaut, Walter Skoczylas, Gregory A. Schwind, Noel Smith, Shouyin Zhang
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Patent number: 9159534Abstract: An openable gas passage provides for rapid pumpout of process or bake out gases in an inductively coupled plasma source in a charged particle beam system. A valve, typically positioned in the source electrode or part of the gas inlet, increases the gas conductance when opened to pump out the plasma chamber and closes during operation of the plasma source.Type: GrantFiled: January 20, 2014Date of Patent: October 13, 2015Assignee: FEI CompanyInventors: Anthony Graupera, Sean Kellogg, Mark W. Utlaut, N. William Parker
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Patent number: 9123500Abstract: An improved method and apparatus for shutting down and restoring an ion beam in an ion beam system. Preferred embodiments provide a system for improved power control of a focused ion beam source, which utilizes an automatic detection of when a charged particle beam system is idle (the beam itself is not in use) and then automatically reducing the beam current to a degree where little or no ion milling occurs at any aperture plane in the ion column. Preferred embodiments include a controller operable to modify voltage to an extractor electrode and/or to reduce voltage to a source electrode when idle state of an ion source of the charged particle beam system is detected.Type: GrantFiled: March 31, 2012Date of Patent: September 1, 2015Assignee: FEI COMPANYInventors: Tom Miller, Sean Kellogg, Jiri Zbranek
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Patent number: 9105438Abstract: Applicants have found that energetic neutral particles created by a charged exchange interaction between high energy ions and neutral gas molecules reach the sample in a ion beam system using a plasma source. The energetic neutral create secondary electrons away from the beam impact point. Methods to solve the problem include differentially pumped chambers below the plasma source to reduce the opportunity for the ions to interact with gas.Type: GrantFiled: May 10, 2013Date of Patent: August 11, 2015Assignee: FEI COMPANYInventors: Tom Miller, Sean Kellogg, Shouyin Zhang, Mostafa Maazouz, Anthony Graupera
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Patent number: 9053895Abstract: An inductively coupled plasma charged particle source for focused ion beam systems includes a plasma reaction chamber with a removably attached source electrode. A fastening mechanism connects the source electrode with the plasma reaction chamber and allows for a heat-conductive, vacuum seal to form. With a removable source electrode, improved serviceability and reuse of the plasma source tube are now possible.Type: GrantFiled: November 30, 2011Date of Patent: June 9, 2015Assignee: FEI COMPANYInventors: Sean Kellogg, Anthony Graupera, N. William Parker, Andrew B. Wells, Mark W. Utlaut, Walter Skoczylas, Gregory A. Schwind, Shouyin Zhang, Noel Smith
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Publication number: 20150102230Abstract: An inductively-coupled plasma source for a focused charged particle beam system includes a plasma chamber and a fluid that is not actively pumped surrounding the plasma chamber for providing high voltage isolation between the plasma chamber and nearby parts which are at ground potential, such as a conductive shield. One or more cooling devices cool the plasma chamber by using evaporative cooling and heat pipes to dissipate the heat from the plasma chamber into a surrounding environment.Type: ApplicationFiled: June 21, 2012Publication date: April 16, 2015Applicant: FEI CompanyInventors: Sean Kellogg, Andrew B. Wells, James B. Mcginn, N. William Parker, Mark W. Utlaut
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Patent number: 8987678Abstract: An inductively-coupled plasma source for a focused charged particle beam system includes a conductive shield that provides improved electrical isolation and reduced capacitive RF coupling and a dielectric fluid that insulates and cools the plasma chamber. The conductive shield may be enclosed in a solid dielectric media. The dielectric fluid may be circulated by a pump or not circulated by a pump. A heat tube can be used to cool the dielectric fluid.Type: GrantFiled: April 2, 2012Date of Patent: March 24, 2015Assignee: FEI CompanyInventors: Sean Kellogg, N. William Parker, Mark W. Utlaut, Anthony Graupera
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Patent number: 8928210Abstract: An inductively coupled plasma charged particle source for focused ion beam systems includes a plasma reaction chamber with a removably attached source electrode. A fastening mechanism connects the source electrode with the plasma reaction chamber and allows for a heat-conductive, vacuum seal to form. With a removable source electrode, improved serviceability and reuse of the plasma source tube are now possible.Type: GrantFiled: November 30, 2011Date of Patent: January 6, 2015Assignee: FEI ComapnyInventors: Sean Kellogg, Anthony Graupera, N. William Parker, Andrew B. Wells, Mark W. Utlaut, Walter Skoczylas, Gregory A. Schwind, Shouyin Zhang, Noel Smith
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Publication number: 20140306607Abstract: An openable gas passage provides for rapid pumpout of process or bake out gases in an inductively coupled plasma source in a charged particle beam system. A valve, typically positioned in the source electrode or part of the gas inlet, increases the gas conductance when opened to pump out the plasma chamber and closes during operation of the plasma source.Type: ApplicationFiled: January 20, 2014Publication date: October 16, 2014Applicant: FEI CompanyInventors: Anthony Graupera, Sean Kellogg, Mark W. Utlaut, N. William Parker
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Patent number: 8779376Abstract: The state of an emitter can be determined by measurements of how the current changes with the extraction voltage. A field factor ? function is determined by series of relatively simple measurements of charged particles emitted at different conditions. The field factor can then be used to determine derived characteristics of the emission that, in the prior art, were difficult to determine without removing the source from the focusing column and mounting it in a specialized apparatus. The relations are determined by the source configuration and have been found to be independent of the emitter shape, and so emission character can be determined as the emitter shape changes over time, without having to determine the emitter shape and without having to redefine the relation between the field factor and the series of relatively simple measurements, and the relationships between the field factor and other emission parameters.Type: GrantFiled: October 10, 2012Date of Patent: July 15, 2014Assignee: FEI CompanyInventors: Lynwood W. Swanson, Gregory A. Schwind, Sean Kellogg, Kun Liu
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Patent number: 8723143Abstract: A focused ion beam (FIB) system is disclosed, comprising an inductively coupled plasma ion source, an insulating plasma chamber containing the plasma, a conducting source biasing electrode in contact with the plasma and biased to a high voltage to control the ion beam energy at a sample, and a plurality of apertures. The plasma within the plasma chamber serves as a virtual source for an ion column comprising one or more lenses which form a focused ion beam on the surface of a sample to be imaged and/or FIB-processed. The plasma is initiated by a plasma igniter mounted near or at the column which induces a high voltage oscillatory pulse on the source biasing electrode. By mounting the plasma igniter near the column, capacitive effects of the cable connecting the source biasing electrode to the biasing power supply are minimized. Ion beam sputtering of the apertures is minimized by proper aperture materials selection.Type: GrantFiled: October 19, 2011Date of Patent: May 13, 2014Assignee: FEI CompanyInventors: Anthony Graupera, Sean Kellogg, Tom Miller, Dustin Laur, Shouyin Zhang, Antonius Bastianus Wilhelmus Dirriwachter
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Patent number: 8642974Abstract: An inductively-coupled plasma source for a focused charged particle beam system includes a conductive shield that provides improved electrical isolation and reduced capacitive RF coupling and a dielectric fluid that insulates and cools the plasma chamber. The conductive shield may be enclosed in a solid dielectric media. The dielectric fluid may be circulated by a pump or not circulated by a pump. A heat tube can be used to cool the dielectric fluid.Type: GrantFiled: June 21, 2011Date of Patent: February 4, 2014Assignee: FEI CompanyInventors: Sean Kellogg, Andrew B. Wells, James B. McGinn, N. William Parker, Mark W. Utlaut, Anthony Graupera