BOTH-SIDE MULTILAYERED OPTICAL DISK AND ITS PRODUCTION

Japanese Patent JP3635588

B2

PROBLEM TO BE SOLVED: To obtain a process for production suitable for the production of many kinds in small quantities with simple stages by holding radiation curing type resins between the reflection layers of first and second substrates and the reflection layer of an intermediate substrate, thereby forming cured resin layers.
SOLUTION: The pit recording surface of the first reflection layer 22 of the first substrate 21 is directed upward and the uncured radiation curing type resin PP is supplied onto the reflection layer 22. Next, the intermediate substrate 23 having microruggedness as the recording surfaces on both surfaces is placed thereon while the one recording surface 23a is directed toward the reflection layer 22 of the substrate 21 and the centers thereof are aligned. The resin PP is then supplied onto the other recording surface 23b of the substrate 23 and the second substrate 24 is placed thereon while the recording surface 25 is directed to the recording surface 23b of the substrate 23 and the centers are aligned. The film thicknesses of the uncured resin layers 26 are adjusted while these layers are formed by rotating the substrates 21, 23, 24 around the common central axis. Then, the need for the stage for sticking the one-side multilayered disks is eliminated and the reduction of the cost and the shortening of the production time are made possible.

Tetsuya Iida
Takanobu Higuchi
Keiji Kan

JP24001095A

April 06, 2005

September 19, 1995

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Pioneer Corporation

B29C41/22; B29D17/00; G11B7/24024; G11B7/24035; G11B7/24038; G11B7/24062; G11B7/26; B29C35/08; (IPC1-7): G11B7/26; G11B7/24

JP4248142A
JP62167634A
JP59068849A
JP64014742A
JP52124309A
JP62129955A
JP59068850A
JP7105568A
JP3209642A
JP54130902A
JP63255830A

Motohiko Fujimura

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