Stamper and method for production thereof
AssigneePioneer Corporation
InventorsTetsuya Iida, Masahiro Katsumura
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Abstract
The present invention relates to a stamper used for an injection molding of a resin material and a manufacturing method thereof. It is provided with such stamper as being excellent in durability in use without causing corrosion at a portion contacting with the resin material, wherein an anti-corrosion film made of any one of alloy selected from a nickel alloy, a silver alloy or a copper alloy is formed on a surface of the stamper contacting with the resin material. Further, it is provided with a method comprising steps of: forming anti-corrosion film on the surface of a mold for manufacturing the stamper; forming the stamper on the anti-corrosion film; and separating the stamper and the anti-corrosion film in a body from the mold.
Claims6
A stamper used for injection molding of an optical disk substrate by using a resin material, wherein an anti-corrosion film comprising any one of alloy selected from the group consisting of a nickel alloy, a silver alloy and a copper alloy is formed on the surface of the stamper contacting with the resin material.
A method for manufacturing the stamper used in the injection molding using the resin material, characterized in that said method comprises steps of:
- using a mold for the stamper on which convex shape corresponding to concave shape to be formed on the surface of the stamper contacting with the resin material, is formed;
- forming an anti-corrosion film made of an alloy selected from the group consisting of a nickel alloy, a silver alloy and a copper alloy on the surface of the stamper manufacturing mold on which the afore-mentioned convex shape is formed;
- laminating a metal layer on said anti-corrosion film by means of an electroplating method;
- and subsequently separating both said metal layer laminated on the anti-corrosion film together with the anti-corrosion film from the stamper manufacturing mold at the same time.
A method for manufacturing the stamper used in the injection molding using the resin material, characterized in that said method comprises steps of:
- using a mold for manufacturing the stamper on which concave shape corresponding to convex shape to be formed on the surface of the stamper contacting with the resin material, is formed;
- forming an anti-corrosion film made of an alloy selected from the group consisting of a nickel alloy, a silver alloy and a copper alloy on the surface of the stamper manufacturing mold on which afore-mentioned concave shape is formed;
- laminating a metal layer on said anti-corrosion film by means of an electroplating method;
- and subsequently separating both said metal layer laminated on the anti-corrosion film and the anti-corrosion film from the stamper manufacturing mold at the same time.
Dependencies are inferred from the claim text.