OPTICAL INFORMATION RECORDING MEDIUM, OPTICAL INFORMATION REPRODUCING APPARATUS AND OPTICAL INFORMATION RECORDING APPARATUS
An optical information recording medium, an optical information reproducing device, and an optical information recording device are provided to apply larger disc clamping force to a recording medium. An optical information recording medium(110) comprises a signal board, a signal recording layer(103)...
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Main Authors | , , |
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Format | Patent |
Language | English |
Published |
19.11.2007
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Subjects | |
Online Access | Get full text |
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Summary: | An optical information recording medium, an optical information reproducing device, and an optical information recording device are provided to apply larger disc clamping force to a recording medium. An optical information recording medium(110) comprises a signal board, a signal recording layer(103), a transparent protection layer(102), and a center hole. The transparent protection layer whose thickness is in a range of 10~200mum is installed on the signal recording layer. An information recording and reproducing operation is performed by irradiating a beam to the signal recording layer through the transparent protection layer. A keeping area is positioned between the center hole and a signal area corresponding to an area with the signal recording layer. A projection unit(100) projected more than the surface of the transparent protection layer is formed at a side of a light incident surface for the area between the center hole and the keeping area. |
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Bibliography: | Application Number: KR20070106120 |