Invention Grant
US08828627B2 Reflective mask blank for EUV lithography and reflective mask for EUV lithography
有权
用于EUV光刻的反光掩模板和用于EUV光刻的反射掩模
- Patent Title: Reflective mask blank for EUV lithography and reflective mask for EUV lithography
- Patent Title (中): 用于EUV光刻的反光掩模板和用于EUV光刻的反射掩模
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Application No.: US13739373Application Date: 2013-01-11
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Publication No.: US08828627B2Publication Date: 2014-09-09
- Inventor: Kazuyuki Hayashi
- Applicant: Asahi Glass Company, Limited
- Applicant Address: JP Chiyoda-ku, Tokyo
- Assignee: Asahi Glass Company, Limited
- Current Assignee: Asahi Glass Company, Limited
- Current Assignee Address: JP Chiyoda-ku, Tokyo
- Agency: Oblon, Spivak, McClelland, Maier & Neustadt, L.L.P.
- Priority: JP2012-016597 20120130; JP2012-174704 20120807; JP2012-250089 20121114
- Main IPC: G03F1/22
- IPC: G03F1/22 ; G03F1/24

Abstract:
A reflective mask for an extreme ultra violet (EUV) lithography obtained by forming a mask pattern in an absorber layer of an reflective mask blank is useful in semiconductor production. The EUV reflective mask has two regions of a mask pattern region and a region outside the mask pattern region. The mask pattern region has the absorber layer and a non-absorber layer on the reflective layer of an substrate, wherein the region outside the mask pattern region has an EUV reflective layer, an EUV absorber layer, and a light shielding layer for suppressing reflection of EUV light and DUV-Vis light having a wavelength of from 190 to 500 nm. The EUV reflective mask reduces unnecessary exposure of resist formed on a substrate to reflected light from the region outside the mask pattern region and reduces a pattern size to produce an accurate transfer pattern.
Public/Granted literature
- US20130196255A1 REFLECTIVE MASK BLANK FOR EUV LITHOGRAPHY AND REFLECTIVE MASK FOR EUV LITHOGRAPHY Public/Granted day:2013-08-01
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