Recording drive waveform adjusting method for manufacturing master disc, master disc manufacturing method, master disc manufacturing apparatus, and master disc
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United States of America Patent
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Jan 3, 2012
Grant Date -
Feb 12, 2009
app pub date -
Jul 2, 2008
filing date -
Aug 10, 2007
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A recording drive waveform adjusting method for manufacturing a master disc is provided. The method includes forming an exposed area in an inorganic resist layer for test exposure by irradiating a master disc having the inorganic resist layer with laser light of a recording power based on a recording drive waveform according to a test recording signal. The method also includes obtaining reflected-light information by irradiating the exposed area formed in the test exposure with laser light of a reproducing power, determining whether the recording drive waveform is appropriate by using the reflected-light information, and correcting the recording drive waveform if the recording drive waveform is determined to be inappropriate in the determination.
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