发明申请
US20110205868A1 OPTICAL RECORDING MEDIUM AND OPTICAL RECORDING-READING METHOD 有权
光学记录介质和光学记录读取方法

OPTICAL RECORDING MEDIUM AND OPTICAL RECORDING-READING METHOD
摘要:
Efficient recording and reading are achieved in an optical recording medium including servo layers and recording and reading layers. The optical recording medium includes: a first servo layer having a projection and a depression for tracking control that are formed in a first spiral direction; a second servo layer having a projection and a depression for tracking control that are formed in a second spiral direction opposite to the first spiral direction; and a plurality of recording and reading layers having a flat structure with no projection and depression for tracking control. Information is recorded on each of the plurality of recording and reading layers while tracking control is performed using the first servo layer or the second servo layer.
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