发明授权
- 专利标题： Optical phase-change disc
- 专利标题（中）： 光学相变盘
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申请号： US874407申请日： 1997-06-13
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公开(公告)号： US5862123A公开(公告)日： 1999-01-19
- 发明人: Michikazu Horie , Takashi Ohno , Hideyuki Kubo , Masae Kubo , Hironobu Mizuno , Masaaki Mizuno , Haruo Kunitomo , Ken-Ichi Takada
- 申请人： Michikazu Horie , Takashi Ohno , Hideyuki Kubo , Masae Kubo , Hironobu Mizuno , Masaaki Mizuno , Haruo Kunitomo , Ken-Ichi Takada
- 申请人地址： JPX Tokyo
- 专利权人： Mitsubishi Chemical Corporation
- 当前专利权人： Mitsubishi Chemical Corporation
- 当前专利权人地址： JPX Tokyo
- 优先权： JPX8-154559 19960614; JPX8-174891 19960704; JPX8-289454 19961031; JPX9-057497 19970312
- 主分类号： G11B7/0055
- IPC分类号： G11B7/0055 ; G11B7/006 ; G11B7/007 ; G11B7/24 ; G11B7/24079 ; G11B7/24082 ; G11B27/19 ; G11B27/24 ; G11B27/30
摘要：
An optical phase-change disc comprises a substrate having thereon a spiral groove or concentric grooves for guiding a focused light beam, and a layer structure including a recording layer and protective layers sandwiching therebetween the recording layer. The groove has wobble for recording ATIP (absolute time information) or ADIP (address information). The following relationship between the groove width GW, beam diameter R.sub.0 and wobble amplitude a.sub.w :0.25.ltoreq.GW/R.sub.0 .ltoreq.0.45or0.65.ltoreq.GW/R.sub.0 ;and0.03.ltoreq.a.sub.w /GW.ltoreq.0.08hold for preventing distortion of the groove caused by repeated overwriting operation to improve reliability of the optical disc.
公开/授权文献
- US5207435A Word game 公开/授权日：1993-05-04
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