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Title:
LITHOGRAPHIC APPARATUS AND DEVICE MANUFACTURING METHOD
Document Type and Number:
Japanese Patent JP2011066440
Kind Code:
A
Abstract:

To provide a lithographic apparatus capable of supplying a high refractive index liquid to a space between a final lens component and a substrate, and of reducing the distortion of the substrate.

A burl plate 20 is intended for use in immersion lithography, wherein the substrate W is arranged on the burl (or pimple) plate 20 and the plate 20 is arranged on a flat surface of a wafer table WT. The burl plate 20 has a plurality of projections 21, 24 that are referred to as "burls" or "pimples" on the top surface thereof. The burl plate 20 has a higher burl density in a peripheral portion than in a middle so that when a higher pressure differential is applied in the peripheral portion, compression of the burls in the peripheral portion is substantially identical to that in the medial portion.


Inventors:
ZAAL KOEN JACOBUS JOHANNES MARIA
JEROEN JOHANNES SOPHIA MARIA MERTENS
OTTENS JOOST JEROEN
Application Number:
JP2010257492A
Publication Date:
March 31, 2011
Filing Date:
November 18, 2010
Export Citation:
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Assignee:
ASML NETHERLANDS BV
International Classes:
H01L21/027; G03F7/20
Domestic Patent References:
JP2001060617A2001-03-06
JP2008306217A2008-12-18
JPH1050810A1998-02-20
JP2001060617A2001-03-06
Attorney, Agent or Firm:
Yoshiyuki Inaba
Toshifumi Onuki