JPH0422289B

• Main Authors: TERAO MOTOYASU, YONEZAWA SEIJI, SHIGEMATSU KAZUO, HORIGOME SHINKICHI, MYAMURA YOSHINORI
• Format: Patent
• Language: English
• Published: 16.04.1992
• Subjects: INFORMATION STORAGE; INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER; PHYSICS

PURPOSE:To obtain an optical disk having a substrate for an optical disk which is stable and has a long life by providing a thin org. film layer on a substrate consisting of chemically tempered glass. CONSTITUTION:The chemically tempered glass by an ion exchange method and a cellulose acetate film as a soft thin org. material film are preliminarily prepd. A methyl acetate 2 is poured into a metallic mold 1 to uniformly wet the mold and a cellulose acetate sheet 3 is stuck thereto. An epoxy adhesive agent 4 is coated thereon and the chemically tempered glass 5 is stuck thereto. The mold 1 is stripped from one end and such substrate is put into a vacuum vapor deposition device where an As-Te-Se recording film 8 is deposited by evaporation on the cellulose acetate layer 2. A spacer 6 is stuck thereto and the chemically tempered glass 7 for protection which is the same in thickness, inside diameter and outside diameter is stuck thereto.