Optical recording medium producing method, and optical recording medium producing device
US7625506B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 18, 2003 |
| Grant date | Dec 1, 2009 |
| Priority date | — |
| Expiry date | Jul 31, 2025 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29L2017/005
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
When manufacturing an optical recording medium by forming a resin layer on a surface of a substrate and then forming a center hole that passes through the substrate and the resin layer, a method of manufacturing an optical recording medium according to the present invention forms the center hole by forming, in the resin layer, a circular cut with a larger diameter than the center hole so as to surround a formation position of the center hole and then pressing in a punching blade for forming the center hole from a rear surface side of the substrate. By doing so, detachment of the resin layer and the production of burrs at or near the center hole can be avoided while reducing the manufacturing cost.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.