| 摘要 |
PURPOSE:To improve S/N of a reproducing signal by forming a thin film blocking recording or reproduction of information only to a separating section separating adjacent recording tracks. CONSTITUTION:An Fe film 4 is vapor-deposited to an optical disc base 1 and resist is coated, and the film is exposed and developed. Then the Fe thin film 4 is removed by etchig and after a recording film 6 is formed on it by the sputtering, a protection film 7 is coated. Recording is applied to a recording track 2 from the side of the base 1 of the optical disc by using a semiconductor laer, and when the disc is reproduced, the Fe thin film 4 on the separating section 3 separating the recording track is not recorded and the reproduced optical beam is reflected on this Fe thin film 4 at the separating section 3 nearly. Thus, no overflowed recording from the recording track 2 is caused and crosstalk is decreased remarkably. |
