Method for manufacturing discoid optical record medium and...

Details Method for manufacturing discoid optical record medium and... Method for manufacturing discoid optical record medium and...

2003-01-17

2008-05-06

Mulvaney, Elizabeth (Department: 1774)

Stock material or miscellaneous articles

Circular sheet or circular blank

C428S064400, C430S270110, C425S289000

Reexamination Certificate

active

07368156

ABSTRACT:
A disc-shaped optical recording medium formed by carrying out a film formation process on a disc-shaped substrate material and completed by forming a center hole at the last step is manufactured in a manner such that no eccentricity will occur when the recording medium is loaded onto a drive.At the last step of an optical disc manufacturing process, i.e., at the time of opening a hole in the center part26of the disc-shaped substrate material12formed with at least a resin layer on one side thereof, the center part26is removed in a manner such that the diameter of the chucking center hole28is larger on the disc-shaped substrate material12side than on the light transmitting resin layer22side of the disc-shaped optical recording medium30, thereby manufacturing the disc-shaped optical recording medium30.

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