发明名称 |
Phase shift layer - containing photomask, and its production and correction |
摘要 |
A photomask blank for preparing a reticle for use in the production of integrated circuits comprises a substrate 30, an electrically conductive layer 31, a light-shielding thin film 32 and an ionizing radiation resist 33 formed of a coated spin-on-glass layer. A pattern is directly formed on the layer 33 by electron beam exposure. After development with a solvent to give a resist pattern 35 (Fig 1c) exposed portions of the light-shielding layer 32 are etched by an etching glass plasma 36 (Fig 1d) to form a light-shielding pattern 37. The remaining resist 33 is incinerated by oxygen plasma 38 (Fig 1e) to form a photomask (Fig 1f). Next, a transparent film 39 is spin-coated over the pattern 37 (Fig 1g), and pattern-exposed to electron beam radiation 40 (Fig 1h), baked (Fig 1i) and developed to form a reticle bearing a phase shift pattern 41 (Fig 1j). The correction of defects in the phase shift layer is also disclosed. |
申请公布号 |
EP0773477(A1) |
申请公布日期 |
1997.05.14 |
申请号 |
EP19960121014 |
申请日期 |
1991.09.23 |
申请人 |
DAI NIPPON PRINTING CO., LTD. |
发明人 |
MIKAMI, KOICHI;MIYASHITA, HIROYUKI;TAKAHASHI, YOICHI;FUJITA, HIROSHI;KURIHARA, MASA-AKI |
分类号 |
G03F1/00 |
主分类号 |
G03F1/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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