Abstract:
PROBLEM TO BE SOLVED: To vary fluid pressure by accelerating a substrate table and accelerating regulating fluid in a supplying device, in a removing device and/or in the substrate table. SOLUTION: A lithography apparatus comprises the substrate table WT which is formed for holding a substrate W and retains the regulating fluid and a regulation system 100 for regulating the substrate table. The regulation system 100 comprises a pressure damper 104 which is communicated with the regulation system 100 through fluid and controls pressure change of the system 100. COPYRIGHT: (C)2008,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a lithographic projection apparatus, which minimizes an effect of gas vibrations or gas pressure changes around an exposure system, which are caused by the actuation of a movable part of the exposure system or of another system in a housing, on the position of a board. SOLUTION: The lithographic projection apparatus includes a position disturbance correcting system, which offsets a disturbance of the position of a board holder 19 holding the board 13. In the apparatus, a space 3 including the exposure system is separated by a holed wall 5 and is separated from a space 4 including another system by a movable wall 10. The space 3, therefore, damps or cuts off the vibrations or pressure changes of the gas. The vibrations of the gas may be offset by a speaker 61. This lithograph apparatus can be employed to provide a novel device manufacturing method. COPYRIGHT: (C)2005,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide a leaf spring having a relatively high stiffness in two orthogonal directions and a relatively low stiffness in other degrees of freedom.SOLUTION: A leaf spring is mounted between two objects, wherein the leaf spring is configured to have a high stiffness in two orthogonal directions, and a relative low stiffness in other degrees of freedom, wherein the leaf spring has a substantially panel-shaped body, the leaf spring including a first mounting location at or near the center of the panel-shaped body to mount the leaf spring to a first of the two objects, wherein the leaf spring includes one or more second mounting locations at or near the circumference of the panel-shaped body to mount the leaf spring to the second of the two objects, and elongate grooves and/or slits in the panel shaped body between the first mounting location and the second mounting location, the grooves and/or slits running in at least two non-orthogonal directions in the plane of the two orthogonal directions.
Abstract:
PROBLEM TO BE SOLVED: To remove the adverse influence to be exerted upon positioning accuracy of a wafer or a mask. SOLUTION: A supporting assembly for use in a lithographic projection apparatus includes a moveable member which is journalled in a housing such that substantially no vibration forces are transmitted between the moveable member and the housing. The assembly comprises a gas filled pressure chamber in which the gas in the pressure chamber acts on the moveable member so as to at least partially counteract the force due to the weight of the moveable member and any other object which it carries. The pressure chamber is supplied with gas and the whole assembly is constructed and arranged such that substantially no gas flows through the pressure chamber when the moveable member is substantially stationary. COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a substrate holder which can clamp a concave substrate more securely. SOLUTION: A substrate holder 10 has burls 12 having a height of 100 μm or less and at least 10 vacuum ports arranged within a central region extending to a radius of two thirds the radius of the substrate. Thus, a concave wafer W' can be securely clamped by generating an initial vacuum in the central region which exerts a clamping force tending to flatten the wafer and allowing the initial vacuum to deepen so that the wafer is fully clamped. COPYRIGHT: (C)2004,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide a method which calibrates a target surface of a position measurement system configured to measure a position of a movable object.SOLUTION: The position measurement system includes the target surface mounted on the movable object, a stationary sensor system, and a processing device to calculate a position of the movable object on the basis of at least one measurement signal of the sensor system. The processing device includes a correction map of the target surface to correct the irregularities of the target surface. The method includes recalibrating the correction map of the target surface by measuring the target surface and determining a recalibrated correction map of the complete target surface on the basis of the measured target surface and one or more deformation modes of the target surface and/or physical objects affecting the target surface.
Abstract:
PROBLEM TO BE SOLVED: To provide a lithographic apparatus to which countermeasures are applied for suppressing influence of pressure variation of a conditioning fluid on a substrate table. SOLUTION: This lithographic apparatus is disclosed that projects a pattern from a patterning device onto a substrate. The lithographic apparatus includes a substrate table configured to hold a substrate. The substrate table includes a conditioning system configured to hold a conditioning fluid and to condition the substrate table. The conditioning system includes a pressure damper that is in fluid communication with the conditioning system and suppresses a pressure variation in the conditioning system. COPYRIGHT: (C)2010,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a positioning system in which vibrations caused by a torque transferred from a balance mass to a base plate are minimized. SOLUTION: The positioning system to position a table within a base frame of a lithographic apparatus includes a first actuator for exerting an actuation force on the table, and being connected to a first balance mass constructed and arranged to absorb a reaction force of the first actuator, and the positioning system includes a controller and a second actuator constructed and arranged to exert a compensation force and/or torque to compensate a torque caused by the actuation force exerted by the first actuator on the first balance mass. COPYRIGHT: (C)2010,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To prevent a center of a sensor from moving relative to a substrate table, even if the substrate table thermally expands and contracts. SOLUTION: A circular sensor is mounted to a substrate table WT equipped with three leaf springs that are spaced evenly around a thermal axis of the sensor. The leaf springs are provided in two parts that are mutually attachable and detachable. Although the leaf springs are elastic and allow some movements of the sensor, relative to the substrate table WT on thermal expansion and contraction, the center of the sensor will not move relative to the substrate table. COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide an improved movable object carrier without additional supports. SOLUTION: The movable object carrier can be moved in a first direction and in a second direction to be positioned in a plane. The object carrier can be moved in the first direction by first and second linear actuators. The first and second linear actuators are adapted to support the object carrier. The linear actuators can include any additional support and are positioned relative to the object carrier so that no other bearing is required to prevent the object carrier from toppling over or tilting. The object carrier can be moved in the second direction by third and fourth linear actuators. The third and fourth linear actuators can be adapted to support the first and second linear actuators. COPYRIGHT: (C)2006,JPO&NCIPI