Multi-layer information recording medium and infor

专利名称：Multi-layer information recording medium

and information recording and reproducingapparatus

发明人：Seiichi Ohsawa,Takanori Maeda申请号：US11094756申请日：20050331公开号：USRE039322E1公开日：20061003

专利附图：

摘要：A multi-layer-information-recording medium is applied to an informationrecording and reproducing apparatus capable of recording or reproducing information

on and from either of a single-layer-information-recording medium having a singlerecording layer on one side, and a multi-layer-information-recording layer having aplurality of recording layers layered on a spacer layer on one side as a change inreflectivity by irradiating a light beam. The multi-layer-information-recording medium iscompatible in terms of at least reproducing and recording with a single-layer-information-recording medium having a cover layer having a predetermined refractiveindex “n” and a thickness “t” disposed on a recording layer on a light incident sidesurface. The multi-layer-information-recording medium includes a deepest recordinglayer deepest from the light incident side surface. The deepest recording layer is formedat an optical distance dfrom the light incident side surface satisfying an equation d=nt.The multi-layer-information-recording medium also includes at least one shallowrecording layer formed at an optical distance dsatisfying an inequality d

申请人：Seiichi Ohsawa,Takanori Maeda

地址：Tsurugashima JP,Tsurugashima JP

国籍：JP,JP

代理机构：Finnegan, Henderson, Farabow, Garrett & Dunner, L.L.P.

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