发明授权
- 专利标题: Optical information medium
- 专利标题(中): 光信息媒体
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申请号: US955156申请日: 1997-10-21
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公开(公告)号: US5895697A公开(公告)日: 1999-04-20
- 发明人: Toshiaki Tajima , Yuji Tomizawa , Ryou Negishi , Emiko Hamada , Toru Fujii
- 申请人: Toshiaki Tajima , Yuji Tomizawa , Ryou Negishi , Emiko Hamada , Toru Fujii
- 申请人地址: JPX Tokyo
- 专利权人: Taiyo Yuden Co., Ltd.
- 当前专利权人: Taiyo Yuden Co., Ltd.
- 当前专利权人地址: JPX Tokyo
- 优先权: JPX8-320891 19961116; JPX8-320893 19961116
- 主分类号: G11B5/62
- IPC分类号: G11B5/62 ; B32B3/00
摘要:
An optical information medium comprises a first disc forming information recording layer on a main surface thereof, a second disc being bonded to the first disc at the surface where the information recording layer is formed by way of an adhesive. A hydrophilic resin film is formed on the surface of the disc at the inner peripheral side extending from the center hole to the information non-recording area. The hydrophilic resin film is damp and is rough compared with the other portion formed of non-hydrophilic resin, and it is elastic. The characters, patterns or designs can be printed on the optical information medium using water-base ink, etc. after manufacturing the optical information medium. Further, the hydrophilic resin film is formed on the disc at the portion outside the information recording area. Further, when the hydrophilic resin film is formed, the surface of the inner and outer peripheral portions of the optical information medium protuberates slightly thicker than other portion so that the fats of the fingers is hardly stuck to the recording surface of the optical information medium even if the inner and outer peripheral portions of the disc is grasped by hand.
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