Magneto-optical disk

Abstract

Abstract PURPOSE:To facilitate overwriting and to enhance environmental resistance by coating at least the surface on the side facing a magnetic field generating means with a compsn. essentially consisting of fluoroplastic soluble in an org. solvent. CONSTITUTION:The magneto-optical disk is formed by forming a dielectric film 2, a magneto-optical recording film 3 and an inorg. protective film 4 in common use as a reflecting film in this order on a transparent plastic substrate 1. The uppermost layer of the magneto-optical disk obtd. in such a manner on the side facing the magnetic field generating means is coated with the protective film 5 consisting of the resin compsn. essentially consisting of the fluoroplastic soluble in an org. solvent. The disk exhibits excellent durability and lubricity in this way and is capable of exhibiting head crash resistance. The fluoroplastic to be used has preferably >=80 deg. contact angle with the water.

Inventors

• 👤 Aritami Yonemura
• 👤 米村　有民
• 👤 Kiyoshi Chiba
• 👤 潔 千葉
• 👤 Eiichi Hashimoto
• 👤 橋本　ひで一

Bibliographic Details