Invention Application
- Patent Title: Low mass six degree of freedom stage for lithography tools
- Patent Title (中): 光刻工具的低质量六自由度阶段
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Application No.: US11804734Application Date: 2007-05-18
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Publication No.: US20080024749A1Publication Date: 2008-01-31
- Inventor: Mark Williams , Alton Phillips
- Applicant: Mark Williams , Alton Phillips
- Applicant Address: JP Tokyo
- Assignee: Nikon Corporation
- Current Assignee: Nikon Corporation
- Current Assignee Address: JP Tokyo
- Main IPC: G03B27/58
- IPC: G03B27/58 ; G03B27/62 ; H02K41/00

Abstract:
A reticle or wafer stage mover with six degrees of freedom, a low mass coarse stage, and the ability to move an object in a scanning direction in a lithography tool. The mover includes a coarse stage and a fine stage configured to support the object and supported by the coarse stage. A set of actuators is provided to move the fine stage in six degrees of freedom. All of the actuators contribute to accelerating the object and the fine stage in the scanning direction. With all the actuators generating the necessary force to move the fine stage, a single large actuator to push the fine stage in the scanning direction is eliminated. The size or mass of the coarse stage is therefore reduced. All of the actuators are also capable of generating a second force in either the X or Z directions. The actuators therefore also enable the fine stage and the object it supports to be positioned in six degrees of freedom, as well as moved in the scanning direction.
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