发明授权
US07551362B2 Projection optical system and method for photolithography and exposure apparatus and method using same 有权
投影光学系统及光刻法及曝光装置及其使用方法

Projection optical system and method for photolithography and exposure apparatus and method using same
摘要:
An immersion optical system includes a liquid immerged optical element having an optical surface which is contactable with a liquid, a convex surface, and an optical axis. A side surface of the liquid immerged optical element is inclined with respect to the optical axis.
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