Abstract:
PROBLEM TO BE SOLVED: To provide an improved controlling system for a lithographic apparatus and the lithographic apparatus having the same. SOLUTION: A controlling system for controlling a position parameter of a stage in a lithographic apparatus has a stage controller for controlling at least a position parameter of a stage at least in a first direction. The controlling system has a disturbance torque estimator for estimating a disturbance torque on a stage around an axis line extended in a second direction which is substantially orthogonal to the first direction. The controlling system has a correcting signal calculator to which the estimated disturbance torque and a signal which represents a position of a stage extended in a third direction which is substantially orthogonal to the first and second directions are provided. The correcting signal calculator determines a feed forward correcting signal for correcting a position error of the stage extended in the first direction caused by the disturbance torque. The feed forward correcting signal is provided to the stage. COPYRIGHT: (C)2008,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a lithographic apparatus for reducing residual liquid left on the surface of a substrate, after exposure by a projection system. SOLUTION: The lithographic apparatus whose localized area of the substrate surface under a projection system PL is immersed in a liquid. By having the height of a liquid supply system 310 above the surface of a substrate W, the height can be varied by using actuators 314. A control system uses feedforward control or feedback control with input of the surface height of the substrate W, to maintain the liquid supply system 310 at a predetermined height above the surface of the substrate W. COPYRIGHT: (C)2008,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide an immersion lithography apparatus having an improved positioning method of a liquid supply system. SOLUTION: The lithography apparatus includes a substrate table for holding a substrate, and a projection system for projecting a radiation beam patterned in a target portion of the substrate. The lithography apparatus has a fluid supply system for supplying fluid between the substrate and a final optical element of the projection system, and a positional control system for controlling a position of the fluid supply system. The positional control system is formed such that it is provided with a positional amount of the substrate, adds offset of a position to the positional amount of the substrate and thus determines a desirable position of the fluid supply system, and performs positioning of the fluid supply system based on the desirable position. The positional amount may include all or one of a position of the substrate, a rotational position of the substrate table, and a height function of height of the substrate. COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a lithographic apparatus intended to reduce liquid which remains on the surface of a substrate after exposure by a projection system. SOLUTION: In the lithographic apparatus, a local region on the surface of the substrate under a projection system PL is immersed in a liquid. The height of a liquid feed system 310 above the surface of a substrate W can be varied using an actuator 314. In a control system, the liquid feed system 310 is maintained at a predetermined height above the surface of the substrate W, using feedforward control or feedback control by inputting the height of the surface of the substrate W. COPYRIGHT: (C)2005,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide a lithographic apparatus for reducing residual liquid left on a surface of a substrate, after exposure by a projection system.SOLUTION: In a lithographic apparatus, a localized area of a surface of a substrate under a projection system PL is immersed in liquid. Height of a liquid supply system 310 above a surface of a substrate W can be varied by using actuators 314. A control system maintains the liquid supply system 310 at predetermined height above the surface of the substrate W, by using feedforward control or feedback control with input of the surface height of the substrate W.
Abstract:
PROBLEM TO BE SOLVED: To reduce a positioning error caused by an external disturbing force in a positioning apparatus. SOLUTION: The positioning apparatus includes a first object, a second object, a positioning system for positioning the first and second objects with each other, and a soft transporting line for connecting the first and second objects with each other. The soft transporting line has a rigidity varying along the line. The transporting line can be represented by a dynamic transferring function. The transferring function is adapted to the closed-loop transferring function of the positioning system. COPYRIGHT: (C)2011,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a lithographic device which is so improved that damage due to especially collision and leakage, etc. in an immersion device is suppressed, related to an immersion lithographic projector. SOLUTION: This lithographic projector includes a calculator which calculates numerical quantities relating to a void dimension between a fluid supply system and a substrate table for holding a substrate based on numerical quantities relating to a position of the substrate table, and that relating to a position of the fluid supply system to prevent the collision between the fluid supply system and the substrate table for holding the substrate. The projector further comprises a damage suppressing system which is so constituted as to generate a warning signal when the numerical quantities relating to the dimension goes beyond a predetermined safety level. COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide an improved control system.SOLUTION: A controller is provided for controlling an actuator system having a plurality of actuators arranged to act on an object. The controller uses a gain balancing matrix to convert a first control signal, representing a set of forces desired to be provided to the center of gravity of the object, into a second control signal, representing an equivalent set of forces to be provided by the plurality of actuators. The system is further configured such that a first gain balancing matrix is used at a first frequency band and a second gain balancing matrix is used at a second frequency band.
Abstract:
PROBLEM TO BE SOLVED: To provide a lithographic apparatus for reducing a remaining liquid on a surface of a substrate after exposure by a projection system. SOLUTION: In this lithographic apparatus, a localized area of the substrate surface under a projection system PL is immersed in liquid. The height of a liquid supply system 310 above the surface of the substrate W can be varied using actuators 314. A control system uses feedforward or feedback control with input of the surface height of the substrate W to maintain the liquid supply system 310 at a predetermined height above the surface of the substrate W. COPYRIGHT: (C)2010,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To improve quality of pixels in a lithographic device and a method for manufacturing the device. SOLUTION: The lithographic device has a first movable element (like an immersion liquid supply system), and operates while contacting the surface of a second movable element (like a substrate table). The lithographic device is also provided with a second element controller (like a substrate table controller) C2 that controls the amount of positions in the second movable element. Disturbance force by capillary force, for example, caused by relative movements of the first and the second movable elements, disturbs the positions y1, y2 of the first and the second movable elements. The lithographic device includes a feed forward control path that feeds a disturbance feed forward signal to the second element controller C2 to correct at least a part of positions of the second movable element caused by such a disturbance force, and the feed forward control path includes a disturbance force estimator Fd that estimates the disturbance force from the amount y1 of the position in the first movable element. COPYRIGHT: (C)2006,JPO&NCIPI