Invention Grant
US08289497B2 Apparatus and methods for recovering fluid in immersion lithography
有权
用于在浸没式光刻中回收流体的装置和方法
- Patent Title: Apparatus and methods for recovering fluid in immersion lithography
- Patent Title (中): 用于在浸没式光刻中回收流体的装置和方法
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Application No.: US12379419Application Date: 2009-02-20
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Publication No.: US08289497B2Publication Date: 2012-10-16
- Inventor: Alex Ka Tim Poon , Leonard Wai Fung Kho , Derek Coon , Gaurav Keswani
- Applicant: Alex Ka Tim Poon , Leonard Wai Fung Kho , Derek Coon , Gaurav Keswani
- Applicant Address: JP Tokyo
- Assignee: Nikon Corporation
- Current Assignee: Nikon Corporation
- Current Assignee Address: JP Tokyo
- Agency: Oliff & Berridge, PLC
- Main IPC: G03B27/52
- IPC: G03B27/52

Abstract:
An immersion lithography apparatus includes a projection system having a final optical element, a movable stage that is movable below the projection system such that a gap exists between the final optical element and a surface of the stage, an immersion liquid being filled in the gap, a liquid confinement member and a liquid diverter. The liquid confinement member maintains the immersion liquid in the gap, and includes a liquid recovery portion that faces the stage surface and recovers liquid from the gap. The liquid recovery portion includes a first porous portion through which a first suction force is applied and a second porous portion through which a second suction force less than the first suction force is applied, the second portion being located outward of the first portion. The liquid diverter is positioned between the stage and at least the first porous portion.
Public/Granted literature
- US20090237631A1 Apparatus and methods for recovering fluid in immersion lithography Public/Granted day:2009-09-24
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