Abstract:
A lithographic projection apparatus includes a projection system having a spherical lens element from which an exposure light is projected through liquid in a space under the spherical lens element, a member disposed adjacent to a surface of the spherical lens element through which the exposure light does not pass, and a gap formed between the member and the surface of the spherical lens element. The gap communicates with the space and includes lower and upper portions. A wafer is moved below and relative to the spherical lens element and the member, and the liquid is retained between the spherical lens element and the member on one side and an upper surface of the wafer on the other side. The liquid locally covers a portion of the upper surface of the wafer to expose the wafer by projecting the exposure light onto the wafer through the liquid in the space.
Abstract:
An immersion lithography apparatus and cleanup method used for the immersion lithography apparatus in which an immersion liquid is supplied to a gap between an optical element of a projection optics and a workpiece during an immersion lithography process. A surface of an object, which is different from the workpiece, is provided below the optical element, a supply port and a recovery port. During a cleanup process, a cleaning liquid is supplied onto the object such that the cleaning liquid covers only a portion of the surface of the object.
Abstract:
A liquid immersion lithography apparatus includes a projection system having a last element. The projection system projects an image onto a workpiece to expose the workpiece through a liquid filled in a space between the last element and the workpiece. A liquid supply device includes a supply inlet that supplies the liquid from the supply inlet to the space between the workpiece and the last element during the exposure. The last element includes an optical element and a plate. The plate prevents the degradation of the optical element that may be affected by contact with the liquid.
Abstract:
A lithographic projection apparatus that is arranged to project a pattern from a patterning device onto a substrate using a projection system has a liquid supply system arranged to supply a liquid to a space between the projection system and the substrate. The apparatus also includes a liquid collecting system that includes a liquid collection member having a permeable member through which a liquid is collected from a surface of an object opposite to the liquid collection member, wherein the permeable member has a plurality of passages that generate a capillary force.
Abstract:
A lithographic projection apparatus that is arranged to project a pattern from a patterning device onto a substrate using a projection system has a liquid supply system arranged to supply a liquid to a space between the projection system and the substrate. The apparatus also includes a liquid collecting system that includes a liquid collection member having a wick structure member through which a liquid is collected from a surface of an object opposite to the liquid collection member.
Abstract:
A lithographic projection apparatus that is arranged to project a pattern from a patterning device onto a substrate using a projection system has a liquid supply system arranged to supply a liquid to a space between the projection system and the substrate. The apparatus also includes a liquid collecting system that includes a liquid collection member having a permeable member through which a liquid is collected from a surface of an object opposite to the liquid collection member, wherein the permeable member has a plurality of passages that generate a capillary force.
Abstract:
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.
Abstract:
An autofocus unit is provided to an immersion lithography apparatus in which a fluid is disposed over a target surface of a workpiece and an image pattern is projected onto this target surface through the fluid. The autofocus unit has an optical element such as a projection lens disposed opposite and above the target surface. An autofocus light source is arranged to project a light beam obliquely at a specified angle such that this light beam passes through the fluid and is reflected by the target surface of the workpiece at a specified reflection position that is below the optical element. A receiver receives and analyzes the reflected light. Correction lenses may be disposed on the optical path of the light beam for correcting propagation of the light beam.
Abstract:
A lithographic apparatus includes a substrate table on which a substrate is held, a projection system including a final optical element, the projection system projecting a patterned beam of radiation through an immersion liquid onto the substrate adjacent the final optical element to expose the substrate during an immersion lithography process, and a liquid supply system including an inlet. The liquid supply system supplies the immersion liquid during the immersion lithography process and supplies a cleaning liquid, which is different from the immersion liquid, during a cleanup process. The cleanup process and the immersion lithography process are performed at different times.
Abstract:
A liquid immersion lithography apparatus includes a projection system having a last element. The projection system projects an image onto a workpiece to expose the workpiece through a liquid filled in a space between the last element and the workpiece. A liquid supply device includes a supply inlet that supplies the liquid from the supply inlet to the space between the workpiece and the last element during the exposure. The last element includes an optical element and a plate. The plate prevents the degradation of the optical element that may be affected by contact with the liquid.