Method for manufacturing optical type recording medium
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United States of America Patent
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-
Oct 23, 1984
Grant Date -
N/A
app pub date -
Mar 8, 1983
filing date -
Mar 15, 1982
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A specific laser-sensitive layer is formed on a substrate so as to manufacture an original disk. The laser-sensitive layer absorbs energy from a laser beam and locally expands and deforms. The laser beam which has a predetermined beam energy to indicate pretrack information for, for example, a self-write/read type optical disk, is used to irradiate the laser-sensitive layer. A spiral projected pattern is locally formed on the laser-sensitive layer, such that a gas is discharged from laser-incident portion which then expands and deforms. A structure so obtained is used as an original disk.
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