Stamper and method for production thereof
US7632628B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 7, 2004 |
| Grant date | Dec 15, 2009 |
| Priority date | — |
| Expiry date | May 15, 2026 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29L2017/005
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.