| 摘要 |
PROBLEM TO BE SOLVED: To improve a recording density and to improve resolution by forming >=1 layers of layers contg. >=1 kinds of materials which are changed in polar items of surface tension by photoirradiation and the derivatives thereof. SOLUTION: This photosensitive medium comprises a spiropyrane-based photochromic material which causes photodissociation accompanying the photoirradiation. This spiropyrane-based photochromic material is an org. photochromic material contg., 1,3,3-Trimethylindolino-6'-nitrobenzorylospiran. The examples thereof include trans which is photoreversible isomerizable material, a stilbene system which causes cis isomerization, an azobenzene system, an azohydrazone system which causes keto-enol tautomerism, a spiropyrane system which causes opening/closing reaction, a frukyd system, a triphenyl methane system which causes ion dissociation reaction, a triphenyl methane system which causes oxidation reaction, etc. The photosensitive medium is obtd. by forming >=1 layers contg. >=1 kinds of the material, etc., which are changed in the polar items of the surface tension by the photoirradiation, etc. |
