Optical recording medium
US4961979A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 5, 1989 |
| Grant date | Oct 9, 1990 |
| Priority date | — |
| Expiry date | Apr 5, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31678
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Disclosed is an optical recording medium comprising a transparent substrate having a tracking line formed therein, and a recording layer formed on that surface of the substrate in which is formed the tracking line. The recording layer consists of a low oxide of nickel. Also disclosed is an optical recording medium comprising a transparent substrate consisting of a thermoplastic resin, a thermosetting resin layer formed on each surface of the substrate, a patterned photoresist layer, said patterned photoresist layer being formed on one of the thermosetting resin layer, and a recording layer formed to cover the exposed portion of the thermosetting resin layer and the patterned photoresist layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.