Information recording mediums, supporter used in the mediums, manufacture methods of the supporter, manufacturing apparatus of the supporter and stampers for producing the mediums
US6254966A · kind A · utility
43Cited by
2References
14Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 3, 1999 |
| Grant date | Jul 3, 2001 |
| Priority date | — |
| Expiry date | Aug 3, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/24479
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An information recording medium and a supporter used for the information recording medium capable of recording a land/groove recording by using a high density recording technique such as a super-resolution, resulting in a high density recording. An information recording medium B has a supporter 1A, on which a recording layer 5 is formed. On the supporter 1A, lands 2 and groove 3 are alternately formed as a minute track pattern. A crevice 4 having a depth Dc larger than a depth Dg of the respective grooves 3 is formed in the respective grooves 3 at one end of the respective grooves 3 in a width direction of the respective grooves.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.