Invention Grant
- Patent Title: Device manufacturing method and apparatus utilizing concentric fan-shaped pattern mask
- Patent Title (中): 使用同心扇形图案掩模的装置制造方法和装置
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Application No.: US09570936Application Date: 2000-05-15
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Publication No.: US06221541B1Publication Date: 2001-04-24
- Inventor: Makoto Ogusu , Kenji Saitoh
- Applicant: Makoto Ogusu , Kenji Saitoh
- Priority: JP9-187376 19970627
- Main IPC: G03F900
- IPC: G03F900

Abstract:
A method of manufacturing an element with a concentric pattern by use of a photolithographic process is disclosed, wherein the method includes preparing masks having segment patterns corresponding to fan-shaped regions, respectively, of the pattern which fan-shaped regions can be defined by dividing the pattern by at least one circle concentric with the pattern to provide plural zones and then by dividing each zone equiangularly, and exposing regions of a substrate corresponding to the plural zones, respectively, by using the masks corresponding to the zones, respectively, while rotating the substrate by regular angles.
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