Method of producing substrate for optical disc
US5906775A · kind A · utility
1Cited by
3References
2Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 24, 1996 |
| Grant date | May 25, 1999 |
| Priority date | — |
| Expiry date | Dec 24, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S425/81
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A prescribed molded substrate is molded out of a melted resin with a stamper having projections for forming pits with the shape of the projections preliminarily set to be greater than the shape of pits of the substrate to be molded. The relationship between the height H of the projections for forming the pits to the stamper and the depth d of the molded substrate is such that H/d=1.3 to 1.8.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.