Production of a multilayer optical recording medium using a...

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Reexamination Certificate

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C430S320000, C264S001330

Reexamination Certificate

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07955786

ABSTRACT:
Provided is a light transmissive stamper having light transmissivity with respect to an ultraviolet ray and durability for repeated use. Specifically, on a light transmissive substrate, a light transmissive auxiliary layer and an inorganic resist layer are formed sequentially, and a light beam is selectively irradiated to the inorganic resist layer, to thereby modify an inorganic resist ranging from a surface of the inorganic resist layer to a surface of the light transmissive auxiliary layer. Then, a part modified by the light beam or an unmodified part is selectively removed until the light transmissive auxiliary layer is exposed, thereby forming an uneven pattern corresponding to an information pattern in the inorganic resist layer.

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Aoki et al., “A low noise durable transmissive stamper for multilayer discs using phase transition mastering”, Proc. SPIE vol. 6282 pp. 62821L-1 to 62821L-10 (2006).
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