Patents by Inventor David Suuronen
David Suuronen 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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Patent number: 9692325Abstract: In accordance with an embodiment of the invention, there is provided an electrostatic chuck comprising a conductive path covering at least a portion of a workpiece-contacting surface of a gas seal ring of the electrostatic chuck, the conductive path comprising at least a portion of an electrical path to ground; and a main field area of a workpiece-contacting surface of the electrostatic chuck comprising a surface resistivity in the range of from about 108 to about 1012 ohms per square.Type: GrantFiled: September 8, 2011Date of Patent: June 27, 2017Assignees: Entegris, Inc., Varian Semiconductor Equipment Associates, Inc.Inventors: David Suuronen, Lyudmila Stone, Julian Blake, Dale K. Stone, Richard A. Cooke, Steven Donnell, Chandra Venkatraman
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Patent number: 9082804Abstract: An electrostatic clamp which more effectively removes built up charge from a substrate prior to removal is disclosed. Currently, the lift pins and the ground pins are the only mechanism used to remove charge from the substrate after implantation. The present discloses describes an electrostatic chuck in which the top dielectric surface has an embedded conductive region, such as a ring shaped conductive region in the sealing ring. Thus, regardless of the orientation of the substrate during release, at least a portion of the substrate will contain the conductive region on the dielectric layer of the workpiece support. This conductive region may be connected to ground through the use of conductive vias in the dielectric layer. In some embodiments, these conductive vias are the fluid conduits used to supply gas to the back side of the substrate.Type: GrantFiled: February 7, 2011Date of Patent: July 14, 2015Assignee: Varian Semiconductor Equipment Associates, Inc.Inventors: Julian Blake, Dale K. Stone, Lyudmila Stone, David Suuronen, Shigeo Oshiro
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Patent number: 9025305Abstract: In accordance with an embodiment of the invention, there is provided an electrostatic chuck. The electrostatic chuck comprises an electrode, and a surface layer activated by a voltage in the electrode to form an electric charge to electrostatically clamp a substrate to the electrostatic chuck, the surface layer including a charge control layer comprising a surface resistivity of greater than about 1011 ohms per square.Type: GrantFiled: May 24, 2011Date of Patent: May 5, 2015Assignees: Entegris, Inc., Varian Semiconductor Equipment Associates, Inc.Inventors: Richard A. Cooke, Dale K. Stone, Lyudmila Stone, Julian Blake, David Suuronen
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Publication number: 20130155569Abstract: In accordance with an embodiment of the invention, there is provided an electrostatic chuck comprising a conductive path covering at least a portion of a workpiece-contacting surface of a gas seal ring of the electrostatic chuck, the conductive path comprising at least a portion of an electrical path to ground; and a main field area of a workpiece-contacting surface of the electrostatic chuck comprising a surface resistivity in the range of from about 108 to about 1012 ohms per square.Type: ApplicationFiled: September 8, 2011Publication date: June 20, 2013Applicants: VARIAN SEMICONDUCTOR EQUIPMENT ASSOCIATES, INC., ENTEGRIS, INC.Inventors: David Suuronen, Lyudmila Stone, Julian Blake, Dale K. Stone, Richard A. Cooke, Steven Donnell, Chandra Venkatraman
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Publication number: 20130070384Abstract: In accordance with an embodiment of the invention, there is provided an electrostatic chuck. The electrostatic chuck comprises an electrode, and a surface layer activated by a voltage in the electrode to form an electric charge to electrostatically clamp a substrate to the electrostatic chuck, the surface layer including a charge control layer comprising a surface resistivity of greater than about 1011 ohms per square.Type: ApplicationFiled: May 24, 2011Publication date: March 21, 2013Applicants: VARIAN SEMICONDUCTOR EQUIPMENT ASSOCIATES, INC., ENTEGRIS, INC.Inventors: Richard A. Cooke, Dale K. Stone, Lyudmila Stone, Julian Blake, David Suuronen
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Publication number: 20130037052Abstract: A method for cleaning a workpiece support that includes using a workpiece that has been coated on its bottom surface with a suitable material is disclosed. This specially coated workpiece is placed on the support, and some time later, it is removed, taking with it particles from the support. In certain embodiments, the workpiece undergoes an ion implantation process to increase its temperature, and to increase the tackiness of the coating on the bottom surface. The material used to coat the bottom can be of variable types, including photoresists, oxides and deposited glasses.Type: ApplicationFiled: August 17, 2012Publication date: February 14, 2013Applicant: VARIAN SEMICONDUCTOR EQUIPMENT ASSOCIATES, INC.Inventors: David Suuronen, Frederick B. Ammon, David Burgdorf, Lyudmila Stone
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Patent number: 8268081Abstract: A method for cleaning a workpiece support that includes using a workpiece that has been coated on its bottom surface with a suitable material is disclosed. This specially coated workpiece is placed on the support, and some time later, it is removed, taking with it particles from the support. In certain embodiments, the workpiece undergoes an ion implantation process to increase its temperature, and to increase the tackiness of the coating on the bottom surface. The material used to coat the bottom can be of variable types, including photoresists, oxides and deposited glasses.Type: GrantFiled: October 2, 2008Date of Patent: September 18, 2012Assignee: Varian Semiconductor Equipment Associates, Inc.Inventors: David Suuronen, Frederick B. Ammon, David Burgdorf, Lyudmila Stone
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Publication number: 20120200980Abstract: An electrostatic clamp which more effectively removes built up charge from a substrate prior to removal is disclosed. Currently, the lift pins and the ground pins are the only mechanism used to remove charge from the substrate after implantation. The present discloses describes an electrostatic chuck in which the top dielectric surface has an embedded conductive region, such as a ring shaped conductive region in the sealing ring. Thus, regardless of the orientation of the substrate during release, at least a portion of the substrate will contain the conductive region on the dielectric layer of the workpiece support. This conductive region may be connected to ground through the use of conductive vias in the dielectric layer. In some embodiments, these conductive vias are the fluid conduits used to supply gas to the back side of the substrate.Type: ApplicationFiled: February 7, 2011Publication date: August 9, 2012Applicant: VARIAN SEMICONDUCTOR EQUIPMENT ASSOCIATES, INC.Inventors: Julian Blake, Dale K. Stone, Lyudmila Stone, David Suuronen, Shigeo Oshiro
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Patent number: 7715170Abstract: Electrostatic clamping devices and methods for reducing contamination to a workpiece coupled to an electrostatic clamping device are disclosed. According to an embodiment an electrostatic clamping device for coupling a workpiece comprises: an embossment portion on a surface of a body to contact the workpiece; and at least two electrodes within the body; wherein the two electrodes are separated by a separation portion below the embossment portion.Type: GrantFiled: March 26, 2007Date of Patent: May 11, 2010Assignee: Varian Semiconductor Equipment Associates, Inc.Inventors: Julian G. Blake, Dale K. Stone, Lyudmila Stone, David Suuronen
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Publication number: 20100083980Abstract: A method for cleaning a workpiece support that includes using a workpiece that has been coated on its bottom surface with a suitable material is disclosed. This specially coated workpiece is placed on the support, and some time later, it is removed, taking with it particles from the support. In certain embodiments, the workpiece undergoes an ion implantation process to increase its temperature, and to increase the tackiness of the coating on the bottom surface. The material used to coat the bottom can be of variable types, including photoresists, oxides and deposited glasses.Type: ApplicationFiled: October 2, 2008Publication date: April 8, 2010Inventors: David Suuronen, Frederick B. Ammon, David Burgdorf, Lyudmila Stone
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Publication number: 20090122458Abstract: An electrostatic chuck includes a layer having a plurality of protrusions to support a workpiece, wherein at least a portion of the layer has a first plurality of the plurality of protrusions. The first plurality of protrusions is spaced to geometrically form a pattern of hexagons. The first plurality of protrusions may be spaced an equal distance from adjacent protrusions and the equal distance may be about 4.0 millimeters from a center of one protrusion to a center of another protrusion. The present disclosure reduces peak mechanical stress levels conventionally present along an edge of each protrusion. Reducing such mechanical stress levels helps reduce backside damage to a supported workpiece, which in turn can reduce the generation of unwanted particles caused by such damage.Type: ApplicationFiled: November 12, 2008Publication date: May 14, 2009Applicant: VARIAN SEMICONDUCTOR EPUIPMENT ASSOCIATED, INC.Inventors: D. Jeffrey Lischer, Dale K. Stone, Lyudmila Stone, David Suuronen, Julian G. Blake
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Publication number: 20080239614Abstract: Electrostatic clamping devices and methods for reducing contamination to a workpiece coupled to an electrostatic clamping device are disclosed. According to an embodiment an electrostatic clamping device for coupling a workpiece comprises: an embossment portion on a surface of a body to contact the workpiece; and at least two electrodes within the body; wherein the two electrodes are separated by a separation portion below the embossment portion.Type: ApplicationFiled: March 26, 2007Publication date: October 2, 2008Inventors: Julian G. Blake, Dale K. Stone, Lyudmila Stone, David Suuronen
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Publication number: 20060171094Abstract: An apparatus is provided to improve clamping of a work piece to a support surface. The apparatus includes a support base, an insulator layer disposed on the support base, an electrode layer disposed on the insulator layer, and a clamping layer comprising aluminum oxynitride disposed on the electrode layer wherein the workpiece is clamped to the surface of the clamping layer. The apparatus provides a higher clamping force for the workpiece while reducing gas leakage and particle levels in addition to maintaining a declamping time suitable for high throughput processing. The apparatus may further provide a raised surface geometry or embossments on the dielectric or a dielectric comprising an outer ring a center cavity for reducing particle contamination to the backside of the workpiece.Type: ApplicationFiled: October 31, 2005Publication date: August 3, 2006Inventors: Richard Muka, Paul Murphy, David Suuronen
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Publication number: 20060124155Abstract: A technique for reducing backside particles is disclosed. In one particular exemplary embodiment, the technique may be realized as an apparatus for reducing backside particles. The apparatus may comprise a delivery mechanism configured to supply a cleaning substance to a platen, wherein the platen is housed in a process chamber. The apparatus may also comprise a control unit configured to cause the process chamber to reach a first pressure level, cause the cleaning substance to be supplied to a surface of the platen, and cause the process chamber to reach a second pressure level, thereby removing contaminant particles, together with the cleaning substance, from the surface of the platen.Type: ApplicationFiled: September 30, 2005Publication date: June 15, 2006Inventors: David Suuronen, Arthur Riaf, Paul Buccos, Kevin Daniels, Paul Murphy, Lawrence Ficarra, Kenneth Starks
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Publication number: 20060012939Abstract: An apparatus is provided to improve clamping of a work piece to a support surface. The apparatus includes a support base, an insulator layer disposed on the support base, an electrode layer disposed on the insulator layer, and a clamping layer comprising aluminum oxynitride disposed on the electrode layer wherein the workpiece is clamped to the surface of the clamping layer. The apparatus provides a higher clamping force for the workpiece while reducing gas leakage and particle levels in addition to maintaining a declamping time suitable for high throughput processing. The apparatus may also include a support base, an insulator layer disposed on the support base, an electrode layer disposed on the insulator layer, and a clamping layer comprising a dielectric layer and a resilient material layer disposed on the electrode layer wherein the workpiece is clamped to the surface of the clamping layer.Type: ApplicationFiled: April 8, 2005Publication date: January 19, 2006Applicant: Varian Semiconductor Equipment Associates, Inc.Inventors: David Suuronen, Paul Murphy