Optical disc with thicker supporting section and thinner recording section
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United States of America Patent
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Nov 6, 2012
Grant Date -
Dec 22, 2011
app pub date -
May 5, 2011
filing date -
Jun 21, 2010
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An optical disc of a thicker supporting section and a thinner recording section is characterized by: a reinforcement section of a predetermined width which overlaps a supporting section and a recording section. With the reinforcement section, the structure of the optical disc is strengthened, and the resonant frequency of the optical disc is raised, so that the vibration of the optical disc is suppressed and the disc is suitable for high speed (16× up) reading/writing. The optical disc comprises: a circular opening disposed in the center of the optical disc; an annular recording section; an annular supporting section disposed between the annular recording section and the circular opening, wherein the annular supporting section is thicker than the annular recording section; and an annular reinforcement section which is disposed on one of the two sides of the optical disc and overlaps the annular supporting section and the annular recording section.
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