发明申请
US20110037958A1 LITHOGRAPHIC APPARATUS AND DEVICE MANUFACTURING METHOD 有权
LITHOGRAPHIC装置和装置制造方法

LITHOGRAPHIC APPARATUS AND DEVICE MANUFACTURING METHOD
摘要:
In an embodiment, a lithographic projection apparatus has an off-axis image field and a concave refractive lens as the final element of the projection system. The concave lens can be cut-away in parts not used optically to prevent bubbles from being trapped under the lens.
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