Media for optical information storage comprising an organic macrocyclic chromophore substituted with a film conferring organic substituent
US5059510A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 22, 1989 |
| Grant date | Oct 22, 1991 |
| Priority date | — |
| Expiry date | Aug 22, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S430/162
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Provided is an information recording medium, e.g., an optical recording medium, and a method for recording information thereon. The information layer of the recording medium comprises an organo macrocyclic chromophore containing a central hetero atom or two central hydrogen atoms or isotopes of hydrogen, e.g., a naphthalocyanine having silicon as the hetero atom, which chromophore is substituted with at least one substituent conferring film forming properties to the chromophore, e.g., a monomer or oligomeric substituent comprised of acid, amide or ester units. The information layer thereby offers excellent thermomechanical properties and exhibits excellent absorption properties all in a single component material. By utilizing a single component material, the problem of dye/polymer phase separation frequently encountered in dye/polymer mixtures is also overcome.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.