Stamper protecting layer for optical disk molding apparatus, optical disk molding apparatus and optical disk molding method using the stamper protecting layer
US6514437B1 · kind B1 · utility
5Cited by
1References
3Claims
0Family size
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Key dates
| Filing date | May 16, 2000 |
| Grant date | Feb 4, 2003 |
| Priority date | — |
| Expiry date | May 16, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S425/81
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A stamper protecting layer is interposed between a mold and a stamper of an optical disk molding apparatus, so that forces generated by extension and shrinkage of the stamper relative in a diametrical direction of the stamper to the mold when an optical disk is molded are absorbed by the stamper protecting layer, with this arrangement, the stamper is prevented from being deformed. Accordingly quality and production of the optical disks are improved.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.