US Patent 7632628 Stamper and method for production thereof
Patent 7632628 was granted and assigned to Pioneer Corporation on December, 2009 by the United States Patent and Trademark Office.
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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.
US Patent 07632628 Stamper and method for production thereof US Patent 7632628 Stamper and method for production thereof
US Patent 07632628 Stamper and method for production thereof
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