Method for molding of substrate for information recording medium and method for preparing substrate for information recording medium
AssigneeCanon Kabushiki Kaisha
InventorsTomoyuki Tamura, Mizuho Hiraoka, Hiroyuki Imataki, Tetsuya Sato
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Abstract
A method for preparing a substrate for an information recording medium, which comprises injecting a liquid resin into a mold for cast molding of a substrate for information recording medium having a plurality of units of mold for cast molding having an uneven preformat pattern on the surface arranged therein and solidifying the resin, and a mold for molding of the substrate.
Claims24
A method for preparing a plurality of substrates for an information recording medium, comprising the steps of:
- preparing a mold for cast molding of the substrates for the information recording medium, with the mold having a plurality of units having uneven preformat patterns corresponding to the information recording medium formed on a surface of the units and having voids formed therebetween;
- filling the voids with a sealing material;
- pouring a liquid resin into the mold for cast molding of the substrates for the information recording medium;
- and
- solidifying the resin.
A method for preparing a substrate sheet having a plurality of uneven preformat patterns for information recording mediums, comprising the steps of:
- preparing a mold for cast molding of the substrates for the information recording mediums, with the mold having a plurality of units having uneven preformat patterns corresponding to the information recording mediums formed on a surface of the units and having voids formed therein;
- filling the voids with a sealing material;
- pouring a liquid resin into a mold for cast molding of the substrate sheet for the information recording mediums;
- and
- solidifying the resin.
Dependencies are inferred from the claim text.