Patents by Inventor Oscar Hemberg
Oscar Hemberg 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: 9947502Abstract: A technique for indirectly measuring the degree of alignment of a beam in an electron-optical system including aligning means, focusing means and deflection means. To carry out the measurements, a simple sensor may be used, even a single-element sensor, provided it has a well-defined spatial extent. When practiced in connection with an X-ray source which is operable to produce an X-ray target, further, a technique for determining and controlling a width of an electron-beam at its intersection point with the target.Type: GrantFiled: May 5, 2016Date of Patent: April 17, 2018Assignee: EXCILLUM ABInventors: Oscar Hemberg, Tomi Tuohimaa, Björn Sundman
-
Patent number: 9564283Abstract: In an electron irradiation system, a gas-tight housing encloses a cathode region and an irradiation region, which communicate through at least an aperture. In the cathode region, there is arranged a high-voltage cathode for emitting an electron beam. In the irradiation region, there is an irradiation site arranged to accommodate a stationary or moving object to be irradiated. The migration of cathode-degrading debris is limited by means of an electric field designed to prevent positively charged particles from entering the cathode region via the aperture. The invention can be embodied with an axial electric field, which realizes an energy threshold, or a transversal field which deflects charged particles away from trajectories leading into the cathode region.Type: GrantFiled: June 14, 2012Date of Patent: February 7, 2017Assignee: EXCILLUM ABInventors: Oscar Hemberg, Tomi Tuohimaa, Per Takman
-
Patent number: 9530607Abstract: Closed-loop circulation for providing liquid metal to an interaction region at which an electron beam is to impact upon the liquid metal to produce X-rays is presented. In a method, the pressure of the liquid metal is raised to at least 10 bar using a high-pressure pump. The pressurized liquid metal is then conducted to a nozzle and ejected into a vacuum chamber in the form of a spatially continuous jet. After passage through the vacuum chamber, the liquid metal is collected in a collection reservoir, and the pressure of the liquid metal is raised to an inlet pressure, e.g. using a primer pump, suitable for the inlet of the high-pressure pump. Also, a corresponding circulation system and an X-ray source provided with such circulation system.Type: GrantFiled: August 12, 2014Date of Patent: December 27, 2016Assignee: EXCILLUM ABInventors: Oscar Hemberg, Tomi Tuohimaa, Mikael Otendal
-
Publication number: 20160247656Abstract: A technique for indirectly measuring the degree of alignment of a beam in an electron-optical system including aligning means, focusing means and deflection means. To carry out the measurements, a simple sensor may be used, even a single-element sensor, provided it has a well-defined spatial extent. When practiced in connection with an X-ray source which is operable to produce an X-ray target, further, a technique for determining and controlling a width of an electron-beam at its intersection point with the target.Type: ApplicationFiled: May 5, 2016Publication date: August 25, 2016Applicant: Excillum ABInventors: Oscar HEMBERG, Tomi TUOHIMAA, Björn SUNDMAN
-
Patent number: 9380690Abstract: A technique for indirectly measuring the degree of alignment of a beam in an electron-optical system including aligning means, focusing means and deflection means. To carry out the measurements, a simple sensor may be used, even a single-element sensor, provided it has a well-defined spatial extent. When practiced in connection with an X-ray source which is operable to produce an X-ray target, further, a technique for determining and controlling a width of an electron-beam at its intersection point with the target.Type: GrantFiled: December 21, 2011Date of Patent: June 28, 2016Assignee: EXCILLUM ABInventors: Oscar Hemberg, Tomi Tuohimaa, Björn Sundman
-
Patent number: 9245707Abstract: An X-ray window includes a primary and a secondary window element. In order to evaporate debris by ohmic heating, current flows through the secondary (upstream) window element. Meanwhile, electric charge originating from electron irradiation and/or depositing charged particles is to be drained off the secondary window element via a charge-drain layer. To prevent large debris particles from short-circuiting the secondary window element, the current for heating the window element flows through heating circuitry which is electrically insulated from the charge-drain layer.Type: GrantFiled: May 29, 2012Date of Patent: January 26, 2016Assignee: EXCILLUM ABInventors: Tomi Tuohimaa, Oscar Hemberg
-
Patent number: 9171693Abstract: An X-ray window including a primary and a secondary window element. In order to evaporate debris by ohmic heating, current flows through the secondary (upstream) window element. Meanwhile, electric charge originating from electron irradiation and/or depositing charged particles is to be drained off the window element. To prevent large debris particles from short-circuiting the window element and changing the desired heating pattern, the current for heating the window element flows through a layer which is insulated from the charge-drain layer.Type: GrantFiled: December 3, 2010Date of Patent: October 27, 2015Assignee: EXCILLUM ABInventors: Oscar Hemberg, Tomi Tuohimaa
-
Publication number: 20150179388Abstract: In an electron irradiation system, a gas-tight housing encloses a cathode region and an irradiation region, which communicate through at least an aperture. In the cathode region, there is arranged a high-voltage cathode for emitting an electron beam. In the irradiation region, there is an irradiation site arranged to accommodate a stationary or moving object to be irradiated. The migration of cathode-degrading debris is limited by means of an electric field designed to prevent positively charged particles from entering the cathode region via the aperture. The invention can be embodied with an axial electric field, which realizes an energy threshold, or a transversal field which deflects charged particles away from trajectories leading into the cathode region.Type: ApplicationFiled: June 14, 2012Publication date: June 25, 2015Applicant: Excillum ABInventors: Oscar Hemberg, Tomi Tuohimaa, Per Takman
-
Publication number: 20150146866Abstract: An X-ray window includes a primary and a secondary window element. In order to evaporate debris by ohmic heating, current flows through the secondary (upstream) window element. Meanwhile, electric charge originating from electron irradiation and/or depositing charged particles is to be drained off the secondary window element via a charge-drain layer. To prevent large debris particles from short-circuiting the secondary window element, the current for heating the window element flows through heating circuitry which is electrically insulated from the charge-drain layer.Type: ApplicationFiled: May 29, 2012Publication date: May 28, 2015Applicant: EXCILLUM ABInventors: Tomi Tuohimaa, Oscar Hemberg
-
Publication number: 20140348302Abstract: Closed-loop circulation for providing liquid metal to an interaction region at which an electron beam is to impact upon the liquid metal to produce X-rays is presented. In a method, the pressure of the liquid metal is raised to at least 10 bar using a high-pressure pump. The pressurized liquid metal is then conducted to a nozzle and ejected into a vacuum chamber in the form of a spatially continuous jet. After passage through the vacuum chamber, the liquid metal is collected in a collection reservoir, and the pressure of the liquid metal is raised to an inlet pressure, e.g. using a primer pump, suitable for the inlet of the high-pressure pump. Also, a corresponding circulation system and an X-ray source provided with such circulation system.Type: ApplicationFiled: August 12, 2014Publication date: November 27, 2014Applicant: EXCILLUM ABInventors: Oscar HEMBERG, Tomi TUOHIMAA, Mikael OTENDAL
-
Patent number: 8837679Abstract: Closed-loop circulation for providing liquid metal to an interaction region at which an electron beam is to impact upon the liquid metal to produce X-rays is presented. In a method according to the invention, the pressure of the liquid metal is raised to at least 10 bar using a high-pressure pump. The pressurized liquid metal is then conducted to a nozzle and ejected into a vacuum chamber in the form of a spatially continuous jet. After passage through the vacuum chamber, the liquid metal is collected in a collection reservoir, and the pressure of the liquid metal is raised to an inlet pressure, e.g. using a primer pump, suitable for the inlet of the high-pressure pump. The invention also relates to a corresponding circulation system and an X-ray source provided with such circulation system.Type: GrantFiled: April 3, 2009Date of Patent: September 16, 2014Assignee: Excillum ABInventors: Oscar Hemberg, Tomi Tuohimaa, Mikael Otendal
-
Patent number: 8681943Abstract: A self-cleaning X-ray window arrangement is provided that includes a primary X-ray-transparent window element, separating an ambient pressure region from an intermediate region, and a secondary X-ray-transparent window element, separating the intermediate region from a reduced pressure region. A contaminant is expected to deposit on a side of the secondary element facing the reduced pressure region. A heat source is adapted to heat a portion of the secondary window element thereby evaporating contaminant. The secondary element shields the primary element from the reduced pressure region, in which contaminant is present, whereas the pressure-tight primary window element carries most of the differential pressure between the ambient pressure region and the reduced pressure region. Several features help to decrease the rate at which contaminant enters the intermediate region.Type: GrantFiled: January 26, 2009Date of Patent: March 25, 2014Assignee: Excillum ABInventors: Hans Hertz, Oscar Hemberg, Tomi Tuohimaa, Mikaél Otendal
-
Publication number: 20130301805Abstract: A technique for indirectly measuring the degree of alignment of a beam in an electron-optical system including aligning means, focusing means and deflection means. To carry out the measurements, a simple sensor may be used, even a single-element sensor, provided it has a well-defined spatial extent. When practiced in connection with an X-ray source which is operable to produce an X-ray target, further, a technique for determining and controlling a width of an electron-beam at its intersection point with the target.Type: ApplicationFiled: December 21, 2011Publication date: November 14, 2013Applicant: Excillum ABInventors: Oscar Hemberg, Tomi Tuohimaa, Björn Sundman
-
Publication number: 20130235979Abstract: An X-ray window including a primary and a secondary window element. In order to evaporate debris by ohmic heating, current flows through the secondary (upstream) window element. Meanwhile, electric charge originating from electron irradiation and/or depositing charged particles is to be drained off the window element. To prevent large debris particles from short-circuiting the window element and changing the desired heating pattern, the current for heating the window element flows through a layer which is insulated from the charge-drain layer.Type: ApplicationFiled: December 3, 2010Publication date: September 12, 2013Applicant: EXCILLUM ABInventors: Oscar Hemberg, Tomi Tuohimaa
-
Publication number: 20120057680Abstract: Closed-loop circulation for providing liquid metal to an interaction region at which an electron beam is to impact upon the liquid metal to produce X-rays is presented. In a method according to the invention, the pressure of the liquid metal is raised to at least 10 bar using a high-pressure pump. The pressurized liquid metal is then conducted to a nozzle and ejected into a vacuum chamber in the form of a spatially continuous jet. After passage through the vacuum chamber, the liquid metal is collected in a collection reservoir, and the pressure of the liquid metal is raised to an inlet pressure, e.g. using a primer pump, suitable for the inlet of the high-pressure pump. The invention also relates to a corresponding circulation system and an X-ray source provided with such circulation system.Type: ApplicationFiled: April 3, 2009Publication date: March 8, 2012Applicant: EXCILLUM ABInventors: Oscar Hemberg, Tomi Tuohimaa, Mikael Otendal
-
Publication number: 20110317818Abstract: A self-cleaning X-ray window arrangement is provided that includes a primary X-ray-transparent window element, separating an ambient pressure region from an intermediate region, and a secondary X-ray-transparent window element, separating the intermediate region from a reduced pressure region. A contaminant is expected to deposit on a side of the secondary element facing the reduced pressure region. A heat source is adapted to heat a portion of the secondary window element thereby evaporating contaminant. The secondary element shields the primary element from the reduced pressure region, in which contaminant is present, whereas the pressure-tight primary window element carries most of the differential pressure between the ambient pressure region and the reduced pressure region. Several features help to decrease the rate at which contaminant enters the intermediate region.Type: ApplicationFiled: January 26, 2009Publication date: December 29, 2011Applicant: Excillum ABInventors: Hans Hertz, Oscar Hemberg, Tomi Tuohimaa, Mikaél Otendal
-
Patent number: 8085399Abstract: A particle detection system uses a reflective optic comprising a curved surface to detect high angle scattered light generated by a particle in a liquid medium, when a laser beam is incident on the particle. When the particles transit the laser beam, light is scattered in all directions and is described by MIE scattering theory for particles about the size of the wavelength of light and larger or Rayleigh Scattering when the particles are smaller than the wavelength of light. By using the reflective optic, the scattered light can be detected over angles that are greater than normally obtainable.Type: GrantFiled: August 3, 2009Date of Patent: December 27, 2011Assignee: JMAR LLCInventors: John A. Adams, Scott H. Bloom, Victor J. Chan, Kristina M. Crousore, Joseph S. Gottlieb, Oscar Hemberg, John J. Lyon, Brett A. Spivey
-
Patent number: 8075732Abstract: A method and apparatus that may comprise an EUV light producing mechanism utilizing an EUV plasma source material comprising a material that will form an etching compound, which plasma source material produces EUV light in a band around a selected center wavelength comprising: an EUV plasma generation chamber; an EUV light collector contained within the chamber having a reflective surface containing at least one layer comprising a material that does not form an etching compound and/or forms a compound layer that does not significantly reduce the reflectivity of the reflective surface in the band; an etchant source gas contained within the chamber comprising an etchant source material with which the plasma source material forms an etching compound, which etching compound has a vapor pressure that will allow etching of the etching compound from the reflective surface. The etchant source material may comprises a halogen or halogen compound.Type: GrantFiled: November 1, 2004Date of Patent: December 13, 2011Assignee: Cymer, Inc.Inventors: William N. Partlo, Richard L. Sandstrom, Igor V. Fomenkov, Alexander I. Ershov, William Oldham, William F. Marx, Oscar Hemberg
-
Patent number: 7931850Abstract: Ablation of holes having diameters as small as 82 nm and having clean walls was obtained in a poly(methyl methacrylate) on a silicon substrate by focusing pulses from a Ne-like Ar, 46.9 nm wavelength, capillary-discharge laser using a freestanding Fresnel zone plate diffracting into third order is described. Spectroscopic analysis of light from the ablation has also been performed. These results demonstrate the use of focused coherent EUV/SXR light for the direct nanoscale patterning of materials.Type: GrantFiled: August 23, 2010Date of Patent: April 26, 2011Assignees: Colorado State University Research Foundation, The Regents of University of California, JMAR Technologies, Inc.Inventors: Carmen S. Menoni, Jorge J. Rocca, Georgiy Vaschenko, Scott Bloom, Erik H. Anderson, Weilun Chao, Oscar Hemberg
-
Publication number: 20110042353Abstract: Ablation of holes having diameters as small as 82 nm and having clean walls was obtained in a poly(methyl methacrylate) on a silicon substrate by focusing pulses from a Ne-like Ar, 46.9 nm wavelength, capillary-discharge laser using a freestanding Fresnel zone plate diffracting into third order is described. Spectroscopic analysis of light from the ablation has also been performed. These results demonstrate the use of focused coherent EUV/SXR light for the direct nanoscale patterning of materials.Type: ApplicationFiled: August 23, 2010Publication date: February 24, 2011Applicants: Colorado State University Research Foundation, JMAR Technologies, Inc., The Regents of University of CaliforniaInventors: Carmen S. Menoni, Jorge J. Rocca, Georgiy Vaschenko, Scott Bloom, Erik H. Anderson, Weilun Chao, Oscar Hemberg