Mold, manufacturing method of a mold, manufacturing method of a recording medium and a substrate for such a recording medium
AssigneeFujitsu Limited
InventorSumio Kuroda
Life of this patent
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Abstract
In a method of manufacturing a mold for forming an information pattern including servo information or address information on a substrate of a recording medium by being pressed onto the heated substrate, carbon is used as a material for the mold. A mask corresponding to the information pattern is formed on the mold made from carbon of the present invention. Said carbon plate is etched in areas having no mask formed thereon, and lastly the mask is removed.
Claims19
A mold for forming an information pattern including servo information or address information on a substrate of a recording medium by pressing a concave and convex face onto the heated substrate, wherein
- the mold is made from carbon.
A mold for forming an information pattern including servo information or address information on a substrate of a recording medium by being pressed onto the heated substrate, comprising:
- a carbon plate;
- a bonding layer formed on the carbon plate;
- and
- a crystalline graphite plate bonded onto said bonding layer,
- wherein
- the crystalline graphite has a covalent bond surface that is formed perpendicularly to a pressing direction.
A method of manufacturing a mold for forming an information pattern including servo information or address information on a substrate of a recording medium by being pressed onto the heated substrate, comprising the steps of:
- forming a mask corresponding to said information pattern on a carbon plate;
- etching said carbon plate in areas on which said mask is not formed;
- and
- removing said mask.
A method of manufacturing a mold for forming an information pattern including servo information or address information on a substrate of a recording medium by being pressed onto the heated substrate, comprising the steps of:
- subjecting a crystalline graphite plate to cleavage;
- forming a mask corresponding to said information pattern on the crystalline graphite plate having been subjected to the cleavage;
- etching said crystalline graphite plate in areas on which said mask is not formed;
- and
- removing said mask.
A method of manufacturing a mold for forming an information pattern including servo information or address information on a substrate of a recording medium by being pressed onto the heated substrate, comprising the steps of
- forming a resist pattern corresponding to said information pattern on a carbon plate;
- forming a metal film on said carbon plate and resist;
- lifting the resist formed on said carbon plate off together with the metal film formed on the resist;
- etching the carbon plate using the metal film formed on said carbon plate as a mask;
- and
- removing the metal film formed on said carbon plate.
A method of manufacturing a mold for forming an information pattern including servo information or address information on a substrate of a recording medium by being pressed onto the heated substrate, comprising the steps of:
- forming a resist pattern corresponding to said information pattern on a carbon plate;
- forming a second carbon layer on said carbon plate and resist;
- and
- removing the resist formed on said carbon plate together with the second carbon layer formed on the resist.
A method of manufacturing a mold for forming an information pattern including servo information or address information on a substrate of a recording medium by being pressed onto the heated substrate, comprising the steps of:
- forming a metal film on a carbon plate;
- forming a resist pattern corresponding to said information pattern on the metal film;
- etching said metal film in areas on which no resist pattern is formed;
- etching said carbon plate using the metal film formed on said carbon plate as a mask;
- and
- removing the metal film formed on said carbon plate and the resist on the metal film.
Dependencies are inferred from the claim text.