M
Megumi Takeuchi
Researcher at Hoya Corporation
Publications - 9
Citations - 135
Megumi Takeuchi is an academic researcher from Hoya Corporation. The author has contributed to research in topics: Photomask & Lithography. The author has an hindex of 4, co-authored 9 publications receiving 135 citations.
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Patent
Phase shift mask and phase shift mask blank
TL;DR: In this paper, a half-tone type phase shift mask blank is presented, in which a semi-transparent film is formed on a transparent substrate, and the semi transparent film serves to shift phase of a first optical light beam which directly transmits the transparent substrate and further, serves to reduce strength of the first light beam.
Patent
Lithography mask blank
TL;DR: In this paper, the ammonium ion production preventing layer for preventing production of ammonium ions is formed on the nitrogen-containing thin film or at least at a surface portion of the nitrogen containing thin film and which is exposed on the surface of the lithography mask after the mask is manufactured.
Patent
Method for manufacturing phase shift mask blank and phase shift mask
TL;DR: In this article, the phase shift mask blank contains oxygen in the optical semi-transmission film composed mainly of nitrogen, metal, and silicon within the range of maintaining the optical characteristics of the optical design.
Patent
Photomask and production of photomask
TL;DR: In this paper, a reversal pattern in a positive-negative reversal relation to the desired mask pattern as a finish product is formed on a substrate which is transparent with respect to desired exposure light.
Proceedings ArticleDOI
Development of halftone phase-shift blank and mask fabrication for ArF lithography
Hideki Suda,Hideaki Mitsui,Osamu Nozawa,Hitoshi Ohtsuka,Megumi Takeuchi,Naoki Nishida,Yasushi Okubo,Masao Ushida +7 more
TL;DR: In this paper, a new MoSi-based HtPSM blank film for ArF application has been developed, which is compatible with conventional mask-making process and repair techniques.