IMMERSION LITHOGRAPHIC APPARATUS AND A DEVICE MANUFACTURING METHOD
An immersion lithographic apparatus has a surface that in use is contacted by the immersion liquid and the surface has a surface roughness Ra that is less than or equal to 0.2 μm. Immersion liquid on the surface may have a contact angle of 60° or greater. The surface may be able to maintain its prop...
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Zusammenfassung: | An immersion lithographic apparatus has a surface that in use is contacted by the immersion liquid and the surface has a surface roughness Ra that is less than or equal to 0.2 μm. Immersion liquid on the surface may have a contact angle of 60° or greater. The surface may be able to maintain its properties so that immersion liquid on the surface may have the contact angle for a prolonged period of immersion in the immersion liquid. |
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