发明名称 |
System for making a photoresist master for a hybrid optical recording disc |
摘要 |
A laser beam recording system for exposing a photoresist master disc having a photoresist layer formed over a substrate for making a hybrid optical recording disc having a read only (ROM) portion and a writable portion, including a first optical modulator for modulating an intensity of a first laser beam having a wavelength selected to provide activating radiation to expose a pattern in the photoresist layer formed over the substrate of the master disc between a lower intensity for exposing a groove in the photoresist layer and a higher intensity for exposing the groove and a pattern of depressions in the groove in the photoresist layer; and a second optical modulator for frequency-modulating an intensity-modulated second laser beam with a wobble-frequency to cause the exposed groove to be a continuously frequency-modulated groove. The recording system also includes a laser beam modulation control system for controlling the operation of the first and second optical modulators to form a continuously frequency-modulated exposed groove with exposed depressions in the ROM portion of the exposed groove. The first and the second laser beams can be provided by one laser as a single laser beam, by one laser as two split laser beams, and by a first and a second laser. <IMAGE> |
申请公布号 |
EP1189220(A3) |
申请公布日期 |
2005.04.06 |
申请号 |
EP20010203308 |
申请日期 |
2001.08.31 |
申请人 |
EASTMAN KODAK COMPANY |
发明人 |
HA, BRUCE;BURGO, THOMAS C. |
分类号 |
G11B7/0045;G11B7/007;G11B7/125;G11B7/26;G11B27/19;G11B27/24 |
主分类号 |
G11B7/0045 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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