Invention Grant
US08213279B2 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
Abstract:
An optical recording medium including recording and reading layers and a servo layer increases the recording capacity thereof. In the optical recording medium including the plurality of recording and reading layers and the servo layer, the servo layer has a groove and a land that can be used to perform tracking control with a long-wavelength servo beam. Information is recorded on the recording and reading layers with a recording and reading beam having a wavelength shorter than the wavelength of the servo beam. Recording marks are formed on the recording and reading layers while both the groove and land are tracked.
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