Title:
OPTICAL RECORDING MEDIUM
Document Type and Number:
Japanese Patent JPH01133790
Kind Code:
A
Abstract:
PURPOSE:To enable additional writing through using a condensed beam of a semiconductor laser, by providing a recording layer comprising a specified compound, on a transparent substrate. CONSTITUTION:An organic thin film layer comprising a compound of the formula is provided on a substrate. The recording layer comprising the compound of the formula is provided by applying a coating material in a thickness of not more than 1mum, and exposing the coated film to a vapor of a solvent such as chloroform and toluene, whereby the absorption wavelength of the thin film is shifted to the longer wavelength side, and the sensitivity to rays in the oscillating wavelength region of a semiconductor laser is markedly enhanced. In the formula, each of rings A1-A4 is a benzene ring, naphthalene ring or anthracene ring, M is Al, Ga, In, Tl, Si, Ge, Sn or Pb, X is a halogen atom., hydroxyl, alkyl, aryl or heterocyclic ring radicle, Z is -OR9, -SP10, -SeR10 or -NR10, wherein R9 is -R6- NR7R8, R10 is an alkyl, cycloalkyl, aryl, acyl radicle, polyether group or -R6-NR7R8, wherein R6 is an alkyl radicle, and each of R7 and R8 is an alkyl radicle or a heterocyclic ring containing N, O or S.
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Inventors:
MIYAZAKI SHUJI
SAKAMOTO MARE
EHASHI SHIGEYUKI
SAKAMOTO MARE
EHASHI SHIGEYUKI
Application Number:
JP33280287A
Publication Date:
May 25, 1989
Filing Date:
December 28, 1987
Export Citation:
Assignee:
TOYO INK MFG CO
International Classes:
B41M5/26; C09B47/04; C09B47/10; C09B47/12; C09B47/18; C09B47/20; C09B47/22; C09B47/24; C09B47/26; G11B7/24; G11B7/244; (IPC1-7): B41M5/26; C09B47/04; C09B47/10; C09B47/12; C09B47/18; C09B47/20; C09B47/22; C09B47/24; C09B47/26; G11B7/24
Domestic Patent References:
| JPS6357288A | 1988-03-11 | |||
| JPS63139789A | 1988-06-11 | |||
| JPS63158294A | 1988-07-01 |