Patents by Inventor Akimitsu Ebihara
Akimitsu Ebihara 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: 8027027Abstract: A lithographic projection apparatus includes a substrate table that holds a substrate, a projection system that projects a patterned beam of radiation onto the substrate, and a liquid confinement structure that confines a liquid in a space between the projection system and the substrate, the substrate, the substrate table, or both, to form a part of a boundary of the space. In addition, a closing plate forms a part of a boundary of the space in place of the substrate, the substrate table, or both, when moved without substantially disturbing the liquid, the liquid confinement structure, or both.Type: GrantFiled: April 19, 2007Date of Patent: September 27, 2011Assignee: Nikon CorporationInventor: Akimitsu Ebihara
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Patent number: 8018575Abstract: A hydrostatic pad (32) and a hydrostatic pad (34) hold a wafer (W) and a table (TB) on which the wafer is mounted. The hydrostatic pad (32) maintains the distance between the bearing surface and the wafer (W) in the direction of the optical axis of a projection optical system (PL) at a predetermined value. Further, since the hydrostatic pads, unlike static gas bearings, utilize the static pressure of incompressible fluid (liquid) between the bearing surface and a support object (substrate), the rigidity of the bearing is high and the distance between the bearing surface and the substrate is maintained stable and constant. In addition, liquid (e.g., pure water) is higher in viscosity than gas (e.g., air), and is superior in vibration damping compared to gas. Accordingly, pattern transfer on a wafer (substrate) substantially free from defocus can be achieved, without necessarily having to arrange a focal position detection system.Type: GrantFiled: January 27, 2006Date of Patent: September 13, 2011Assignee: Nikon CorporationInventor: Akimitsu Ebihara
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Patent number: 7969557Abstract: A lithographic projection apparatus includes a substrate table that holds a substrate, a projection system that projects a patterned beam of radiation onto the substrate, and a liquid confinement structure that confines a liquid in a space between the projection system and the substrate, the substrate, the substrate table, or both, to form a part of a boundary of the space. In addition, a closing plate forms a part of a boundary of the space in place of the substrate, the substrate table, or both, when moved without substantially disturbing the liquid, the liquid confinement structure, or both.Type: GrantFiled: April 19, 2007Date of Patent: June 28, 2011Assignee: Nikon CorporationInventor: Akimitsu Ebihara
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Patent number: 7907252Abstract: A hydrostatic pad (32) and a hydrostatic pad (34) hold a wafer (W) and a table (TB) on which the wafer is mounted. The hydrostatic pad (32) maintains the distance between the bearing surface and the wafer (W) in the direction of the optical axis of a projection optical system (PL) at a predetermined value. Further, since the hydrostatic pads, unlike static gas bearings, utilize the static pressure of incompressible fluid (liquid) between the bearing surface and a support object (substrate), the rigidity of the bearing is high and the distance between the bearing surface and the substrate is maintained stable and constant. In addition, liquid (e.g., pure water) is higher in viscosity than gas (e.g., air), and is superior in vibration damping compared to gas. Accordingly, pattern transfer on a wafer (substrate) substantially free from defocus can be achieved, without necessarily having to arrange a focal position detection system.Type: GrantFiled: January 27, 2006Date of Patent: March 15, 2011Assignee: Nikon CorporationInventor: Akimitsu Ebihara
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Publication number: 20110043781Abstract: A projection optical device includes a projection optical system which projects an image of a pattern, a support member attached to the projection optical system, and a plurality of coupling members connected to the support member. The coupling members suspend and support the projection optical system through the support member from an upper direction of the support member. The projection optical device can include a frame to which one end of each of the coupling members is attached, such that the projection optical system hangs from the frame via the support member and the coupling members. A projection optical device also can include a liquid supply which supplies a temperature-controlled liquid to a side surface of a projection optical system utilizing gravity to cause the temperature-controlled liquid to flow along the side surface of the projection optical system.Type: ApplicationFiled: October 28, 2010Publication date: February 24, 2011Applicant: NIKON CORPORATIONInventors: Akimitsu Ebihara, Martin E. Lee, Bausan Yuan
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Publication number: 20110025997Abstract: An immersion liquid is supplied to a space between a projection system and a substrate, and a patterned beam of radiation is projected through the liquid onto a target portion of the substrate using the projection system. Substrates can be held on first and second tables. The first and second tables are moved together so as to transit from a first state to a second state, the first state in which the liquid immersion is maintained between the projection system and one of the first and second tables, the second state in which the liquid immersion is maintained between the projection system and the other one of the first and second tables. During the transition, the liquid immersion is maintained just below the projection system.Type: ApplicationFiled: October 5, 2010Publication date: February 3, 2011Applicant: NIKON CORPORATIONInventor: Akimitsu Ebihara
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Publication number: 20110025996Abstract: An immersion liquid is supplied to a space between a projection system and a substrate, and a patterned beam of radiation is projected through the liquid onto a target portion of the substrate using the projection system. A liquid retaining member is replaced with a table member that holds the substrate at an opposite position to the projection system while the liquid is maintained in contact with the projection system so as to transit from a first state to a second state, the first state in which the liquid is maintained between the projection system and the liquid retaining member, the second state in which the liquid is maintained between the projection system and the table member.Type: ApplicationFiled: October 5, 2010Publication date: February 3, 2011Applicant: NIKON CORPORATIONInventor: Akimitsu Ebihara
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Patent number: 7812925Abstract: A lithographic projection apparatus includes an illumination system that conditions a radiation beam, a support structure that holds a patterning device, the patterning device being capable of imparting the radiation beam with a pattern. a substrate table that holds a substrate, and a projection system that projects the patterned radiation beam onto a target portion of the substrate. In addition, a liquid supply system provides a liquid to a space between the projection system and the substrate, the liquid supply system having a member. A liquid seal device forms a liquid seal between the member and the substrate.Type: GrantFiled: January 26, 2006Date of Patent: October 12, 2010Assignee: Nikon CorporationInventor: Akimitsu Ebihara
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Publication number: 20100164326Abstract: A motor device includes a rotor, a transmission member wound around at least a portion of an outer periphery of the rotor, a moving part connected to the transmission member to move the transmission member, and a control unit which makes the moving part perform the driving operation of moving the transmission member by a predetermined distance in a state where a torque transmission state is brought between the rotor and the transmission member, and the returning operation of returning the transmission member to a predetermined position in a state where the torque transmission state is released.Type: ApplicationFiled: December 22, 2009Publication date: July 1, 2010Applicant: NIKON CORPORATIONInventor: Akimitsu Ebihara
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Publication number: 20090268177Abstract: An exposing method that forms a pattern of a reticle on a wafer is provided. In the method, part of the pattern of the reticle in an illumination area, which is illuminated by illumination light from an illumination optical system, is illuminated, and while scanning the illumination area with respect to the reticle in the +Y direction (or the ?Y direction) by pivoting a deflection mirror, the reticle is moved in the corresponding ?Y direction (or the +Y direction) and the wafer is moved in a direction that corresponds to the movement direction of the reticle.Type: ApplicationFiled: January 8, 2009Publication date: October 29, 2009Applicant: NIKON CORPORATIONInventor: Akimitsu Ebihara
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Patent number: 7573225Abstract: An exposure apparatus that irradiates an energy beam to a substrate includes a projection optical system that projects the energy beam to the substrate, and a support device having a flexible structure to support the projection optical system. According to one embodiment, the flexible structure includes three flexible rods that support the projection optical system from an upper side of the projection optical system. According to an embodiment, extended lines of the respective rods cross at a reference point of the projection optical system.Type: GrantFiled: August 25, 2005Date of Patent: August 11, 2009Assignee: Nikon CorporationInventor: Akimitsu Ebihara
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Publication number: 20090190112Abstract: A lithographic projection apparatus includes an illumination system that conditions a radiation beam, a support structure that holds a patterning device, the patterning device being capable of imparting the radiation beam with a pattern. a substrate table that holds a substrate, and a projection system that projects the patterned radiation beam onto a target portion of the substrate. In addition, a liquid supply system provides a liquid to a space between the projection system and the substrate, the liquid supply system having a member. A liquid seal device forms a liquid seal between the member and the substrate.Type: ApplicationFiled: March 24, 2009Publication date: July 30, 2009Applicant: NIKON CORPORATIONInventor: Akimitsu Ebihara
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Patent number: 7486385Abstract: An immersion liquid is supplied to a space between a projection system and a substrate, and a patterned beam of radiation is projected through the liquid onto a target portion of the substrate using the projection system. The projection system is maintained in contract with the immersion liquid after the substrate has been moved away from under the projection system.Type: GrantFiled: November 21, 2006Date of Patent: February 3, 2009Assignee: Nikon CorporationInventor: Akimitsu Ebihara
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Publication number: 20080236997Abstract: Disclosed is a stage apparatus which drives an object, comprising a base member, a first guide member disposed along a guide face of the base member, a second guide member disposed along the guide face so as to intersect with the first guide member, first and second sliders disposed such that the first and second sliders can move along the first and the second guide members, respectively, a connecting member having a flexible structure to connect the first and the second sliders to each other, and a movable stage which is to hold the object and is movably disposed on the guide face, and which is connected to the first and the second sliders.Type: ApplicationFiled: August 19, 2005Publication date: October 2, 2008Applicant: NIKON CORPORATIONInventor: Akimitsu Ebihara
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Publication number: 20080068568Abstract: A projection optical device includes a projection optical system which projects an image of a pattern, a support device having a flexible structure to support the projection optical system, and a positioning device having an actuator to position the projection optical system. The projection optical device can include a frame to which one end of the flexible structure is attached. The projection optical system may hang from the frame via the support device, or it may be supported from below by the support device. A projection optical device also can include a liquid supply which supplies a temperature-controlled liquid to a side surface of a projection optical system utilizing gravity to cause the temperature-controlled liquid to flow along the side surface of the projection optical system.Type: ApplicationFiled: July 18, 2005Publication date: March 20, 2008Applicant: NIKON CORPORATIONInventors: Akimitsu Ebihara, Martin Lee, Bausan Yuan
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Patent number: 7321419Abstract: A hydrostatic bearing is provided opposite to a wafer on a table. The hydrostatic bearing maintains the distance between the bearing surface and the wafer in the direction of the optical axis of a projection optical system at a predetermined value.Type: GrantFiled: October 27, 2005Date of Patent: January 22, 2008Assignee: Nikon CorporationInventor: Akimitsu Ebihara
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Publication number: 20080002166Abstract: A liquid immersion exposure apparatus includes an optical element through which an exposure beam passes, a first table which is movable relative to the optical element, while holding a substrate and a second table which is movable relative to the optical element while holding a substrate. The optical element is kept in contact with an exposure liquid while the first table and the second table are moved from a first state in which the first table is opposite to the optical element to a second state in which the second table is opposite to the optical element.Type: ApplicationFiled: August 16, 2007Publication date: January 3, 2008Applicant: NIKON CORPORATIONInventor: Akimitsu Ebihara
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Publication number: 20070211234Abstract: A lithographic projection apparatus includes a substrate table that holds a substrate, a projection system that projects a patterned beam of radiation onto the substrate, and a liquid confinement structure that confines a liquid in a space between the projection system and the substrate, the substrate, the substrate table, or both, to form a part of a boundary of the space. In addition, a closing plate forms a part of a boundary of the space in place of the substrate, the substrate table, or both, when moved without substantially disturbing the liquid, the liquid confinement structure, or both.Type: ApplicationFiled: April 19, 2007Publication date: September 13, 2007Applicant: NIKON CORPORATIONInventor: Akimitsu Ebihara
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Publication number: 20070206170Abstract: An exposure apparatus that forms a pattern by exposing a substrate is equipped with a first platform tower, a second platform tower installed at a predetermined distance, and an exposure main section arranged within the space between both platform towers that includes a plurality of high rigidity sections each including a high rigidity component. Accordingly, it becomes possible to use a module (a high rigidity section) of the preceding generation even when the generation changes.Type: ApplicationFiled: December 28, 2006Publication date: September 6, 2007Applicant: NIKON CORPORATIONInventor: Akimitsu Ebihara
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Patent number: RE41232Abstract: A positioning stage assembly having a coarse stage which includes a planar motor driveable in at least two degrees of freedom, and a fine stage positioned on the coarse stage which is driveable in at least three degrees of freedom with respect to the coarse stage. More preferably, the fine stage is driveable in six degrees of freedom and includes variable reluctance actuators for positioning in three degrees of freedom.Type: GrantFiled: June 24, 2004Date of Patent: April 20, 2010Assignee: Nikon CorporationInventors: Andrew J. Hazelton, W. Thomas Novak, Akimitsu Ebihara