Magneto-optical disk

Abstract

Abstract PURPOSE:To avert the damage of a magneto-optical recording film of a disk provided with the magneto-optical recording film on a disk-shaped substrate and a sliding resistant protective film positioned thereon by previously reinforcing the region of the protective film where a magnetic head comes into contact with the protective film. CONSTITUTION:The sliding resistant protective film 3 consisting of a UV curing resin is applied concentrically on the disk-shaped magneto-optical disk substrate 1 provided with the magneto-optical recording film 2 on rugged patterns 1. A stamper 4 having a flat surface is then superposed thereon and a load is exerted over the entire surface of the substrate to force expand the resin. A shaft 5 provided in the central part is thereafter slightly lifted upward to increase the resin thickness in the inside circumferential part of the optical disk substrate 1, following which UV light 6 is projected on the resin to cure the resin in this state. The stamper 4 is then removed and the sliding resistant protective film 3 which has the large thickness in the inside circumferential part is obtd. Since the film in the region on the disk where the magnetic head comes into contact is increased in such a manner, the generation of damages in the recording film is obviated and the disk with which stands long-term use is obtd.

Inventors

• 👤 Yoshinori Miyamura
• 👤 Mari Ichikawa
• 👤 Yumiko Anzai
• 👤 Shinkichi Horigome
• 👤 Norio Ota
• 👤 Takeshi Nakao
• 👤 Yoichi Kawakubo
• 👤 Hajime Fukuya

Bibliographic Details