发明申请
US20160349628A1 ROTATABLE FRAME, LITHOGRAPHIC APPARATUS, PROJECTION SYSTEM, METHOD FOR FOCUSING RADIATION AND DEVICE MANUFACTURING METHOD 审中-公开
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ROTATABLE FRAME, LITHOGRAPHIC APPARATUS, PROJECTION SYSTEM, METHOD FOR FOCUSING RADIATION AND DEVICE MANUFACTURING METHOD
摘要:
A projection system, configured to project a radiation beam onto a target, includes a rotatable frame configured to rotate about an axis defining a tangential direction and a radial direction, wherein the rotatable frame holds a lens configured to focus the radiation beam in only the tangential or radial direction; and a stationary part comprising a substantially stationary lens configured to focus the radiation beam in only the other of the tangential or radial direction.
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