Invention Grant
- Patent Title: Blankmask and method for fabricating photomask using the same
- Patent Title (中): 坯料和使用其制造光掩模的方法
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Application No.: US13928618Application Date: 2013-06-27
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Publication No.: US09229317B2Publication Date: 2016-01-05
- Inventor: Kee-Soo Nam , Geung-Won Kang , Chul-Kyu Yang , Jong-Hwa Lee , Kyu-Jin Jang
- Applicant: S&S TECH Co.,Ltd.
- Applicant Address: KR Daegu-Si
- Assignee: S&S TECH CO., LTD.
- Current Assignee: S&S TECH CO., LTD.
- Current Assignee Address: KR Daegu-Si
- Agency: William Park & Associates Ltd.
- Priority: KR10-2012-0070772 20120629
- Main IPC: G03F1/50
- IPC: G03F1/50

Abstract:
Provided is a blankmask with a light-shielding layer including a light block layer and an anti-reflective layer, and a hard mask film. The light block layer and the anti-reflective layer are formed by combining a layer formed of a MoSi compound and a layer formed of a MoTaSi compound. Thus, the blankmask enables formation of a pattern of 32 nm or less, since the light-shielding layer can be thinly formed to a thickness of 200 to 700 and a photomask having pattern fidelity corresponding to the resolution of the pattern can be formed. The light-shielding layer has an optical density of 2.0 to 4.0 at an exposure wavelength of 193 nm, chemical resistance, and a sufficient process margin for defect repair. Further, the hard mask film is formed to a thickness of 20 to 50 using a compound including tin (Sn) and chromium (Cr), thereby decreasing an etch rate of the hard mask film. Accordingly, a resist film can be formed as a thin film, thereby manufacturing a high-resolution blankmask.
Public/Granted literature
- US20140004449A1 BLANKMASK AND METHOD FOR FABRICATING PHOTOMASK USING THE SAME Public/Granted day:2014-01-02
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