Optical disc, optical disc manufacturing method, a

专利名称：Optical disc, optical disc manufacturing

method, and optical disc apparatus

发明人：Toshihiro Sugaya,Masato Otsuka,Naomasa

Nakamura,Nobuhisa Yoshida,Hisashi Yamada

申请号：US11504580申请日：20060816公开号：US07570566B2公开日：20090804

专利附图：

摘要：According to one embodiment, an optical disc is the following the distancebetween a light incidence plane and the first recording layer is a minimum of 550 μm. The

distance between the first and the third recording layer is a maximum of 72 μm. Thedistance between the second and the third recording layer is a minimum of 15 μm. Thedistance between the first and the second recording layer is about 31 to 40 μm. Thereflectivities of the first and the second recording layer with respect to the first laserbeam range from 18 to 27%, and the ratio therebetween is about 1.1 or less. Thereflectivity of the third recording layer is below about 6%. The areal recording density ofthe third recording layer is three times or more as high as that of the first recording layerand the second recording layer.

申请人：Toshihiro Sugaya,Masato Otsuka,Naomasa Nakamura,NobuhisaYoshida,Hisashi Yamada

地址：Moriya JP,Tokyo JP,Yokohama JP,Kamakura JP,Yokohama JP

国籍：JP,JP,JP,JP,JP

代理机构：Oblon, Spivak, McClelland, Maier & Neustadt, P.C.

更多信息请下载全文后查看