发明授权
- 专利标题： Optical recording medium and method of manufacturing the same
- 专利标题（中）： 光记录介质及其制造方法
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申请号： US11140928申请日： 2005-06-01
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公开(公告)号： US07507457B2公开(公告)日： 2009-03-24
- 发明人: Koji Mishima , Daisuke Yoshitoku , Kenji Yamaga
- 申请人： Koji Mishima , Daisuke Yoshitoku , Kenji Yamaga
- 申请人地址： JP Tokyo
- 专利权人： TDK Corporation
- 当前专利权人： TDK Corporation
- 当前专利权人地址： JP Tokyo
- 代理机构： Oblon, Spivak, McCelland, Maier & Neustadt, P.C.
- 优先权： JP2004-163239 20040601
- 主分类号： B32B3/02
- IPC分类号： B32B3/02
摘要：
An optical recording medium includes a support substrate, and a light transmission layer 12 that is disposed so as to come in contact with the support substrate. At least one of a refractive index of the support substrate and a refractive index of the light transmission layer, and an extinction coefficient of the support substrate and an extinction coefficient of the light transmission layer is different. As such, according to the invention, a reflective layer is not formed between the support substrate and the light transmission layer, such that the support substrate and the light transmission layer directly come in contact with each other. Accordingly, since at least one of the refractive index and the extinction coefficient is different, reflection occurs at the interface between the support substrate and the light transmission layer. Therefore, data held by a plurality of pits, that are arranged on the support substrate in a spiral shape or a concentric shape, can be correctly read out.
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