| 摘要 |
PROBLEM TO BE SOLVED: To obtain a phase transition type optical recording medium which is free from peeling of films, the occurrence of cracking and the flow of a recording layer by improving the adhesiveness of the protective layer with recording layer of the phase transition type optical recording medium with which the recording and reproducing and erasing of information are executed by utilizing the change in the phase structure of the recording layer induced by irradiation with light. SOLUTION: This medium consists of the basic constitution composed by successively laminating a first dielectric layer, a second dielectric layer, the recording layer, a third dielectric layer and a reflection layer. The second dielectric layer contains oxygen in excess of the amt. of the oxygen contained in the first dielectric layer and the third dielectric layer and is formed to a film thickness of 1 to 10 nm. As the process for production, the dielectric layers are formed by a sputtering method and a gaseous mixture prepd. by mixing at least >=1 kind of the gases contg. oxygen elements and a rare gas is used for the atmosphere at the time of forming the second dielectric layer. The rear gas is used for the atmosphere at the time of forming the first dielectric layer and the third dielectric layer. |
