Optical recording medium
US8197923B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 19, 2007 |
| Grant date | Jun 12, 2012 |
| Priority date | — |
| Expiry date | Aug 11, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B7/2467
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An optical recording medium having a substrate and an optical recording layer on the substrate. The optical recording layer is formed of an optical recording material containing at least one heterocyclic compound represented bygeneral formula (I):wherein Z1 represents oxygen, sulfur, —CR5R6—, etc. (R5 and R6 are each a substituent, e.g., an alkyl group or an aralkyl group, or are taken together to form a ring); R1 and R2 each represent hydrogen, etc.; R3 and R4 each represent an alkyl group having 1 to 8 carbon atoms or are taken together to form a heterocyclic ring having no multiple bond; Y1 represents a hydrogen atom, an alkyl group having 1 to 8 carbon atoms, a metallocene substituent, etc.; Anq− represents a q-valent anion; q represents 1 or 2; p represents a number necessary to neutralize an electric charge; and n represents a number of 1 to 4.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.