发明名称 |
POSITIONING SYSTEM USING SURFACE PATTERN RECOGNITION AND INTERPOLATION |
摘要 |
A stage assembly for positioning a device along a first axis, the stage assembly comprising: a base; a stage that retains the device and moves above the base; a mover assembly that moves the stage along the first axis relative to the base; a first sensor system that monitors the movement of the stage along the first axis, the first sensor system generating a first signal, the first sensor system having a first sensor accuracy; a second sensor system that monitors the movement of the stage along the first axis, the second sensor system having a second sensor accuracy that is different from the first sensor accuracy of the first sensor system, the second sensor generating a second signal; and a control system that controls the mover assembly using at least one of the first sensor and the second signal. |
申请公布号 |
US2015301459(A1) |
申请公布日期 |
2015.10.22 |
申请号 |
US201514689570 |
申请日期 |
2015.04.17 |
申请人 |
NIKON CORPORATION |
发明人 |
Coon Paul Derek;Wells Jonathan K.;Rosa Matthew;Binnard MIchael |
分类号 |
G03F7/20 |
主分类号 |
G03F7/20 |
代理机构 |
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代理人 |
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主权项 |
1. A stage assembly for positioning a device along a first axis, the stage assembly comprising:
a base; a stage that is adapted to retain the device and moves above the base; a mover assembly that moves the stage along the first axis relative to the base; a first sensor system that monitors the movement of the stage along the first axis, the first sensor system generating a first signal, the first sensor system having a first sensor accuracy; a second sensor system that monitors the movement of the stage along the first axis, the second sensor system having a second sensor accuracy that is different from the first sensor accuracy of the first sensor system, the second sensor generating a second signal; and a control system that controls the mover assembly using at least one of the first sensor and the second signal. |
地址 |
Tokyo JP |