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    • 3. 发明授权
    • Double-sided digital optical disk and method and apparatus for making
    • 双面数字光盘及制作方法及装置
    • US06962668B2
    • 2005-11-08
    • US10290116
    • 2002-11-06
    • Brian S. MedowerMichael F. BraitbergDavid H. Davies
    • Brian S. MedowerMichael F. BraitbergDavid H. Davies
    • B29C45/26B29D11/00
    • B29C45/263B29C2045/2653
    • A digital optical information disk contains content and/or non-content information on both sides of a single substrate produced by a process that embosses the surfaces of both sides substantially simultaneously. Simultaneous molding substantially eliminates the need for lamination when two or more data layers are to be provided. Preferably, the disk is relatively small, such as less than 50 mm in diameter and can replicate marks or features with a z-dimension magnitude of about 80 mm or more. The disk remains within a specified opto-mechanical range of an optical transducer and has little, if any, non-planarity (warp) or other distortion. The disk can be used for reading pre-written or mastered content, e.g., in a user's device, and/or can include information or features that permits or supports utility functions, allowing the user to record data thereon such as tracking, sector, location, timing, synchronization features or combinations thereof. Preferably, the disk is formed by an injection-only technique, although it is possible to provide suitable disks by an injection-compression technique as well.
    • 数字光学信息盘包含通过基本上同时压印两侧表面的工艺制造的单个基板的两侧上的内容和/或非内容信息。 当要提供两个或多个数据层时,同时模制基本上消除了对层压的需要。 优选地,盘相对较小,例如直径小于50mm,并且可以复制具有约80mm或更大的z尺寸大小的标记或特征。 磁盘保持在光学传感器的指定的光学机械范围内,并且具有很小的(如果有的话)非平面性(翘曲)或其它失真。 磁盘可用于读取预先写入或已掌握的内容,例如在用户设备中,和/或可以包括允许或支持效用功能的信息或特征,允许用户在其上记录数据,例如跟踪,扇区,位置 ,定时,同步特征或其组合。 优选地,盘通过注射技术形成,尽管也可以通过注射压缩技术提供合适的盘。
    • 6. 发明授权
    • Particulate magnetic medium utilizing keeper technology and methods of
manufacture
    • 使用保持器技术的微粒磁性介质和制造方法
    • US5843565A
    • 1998-12-01
    • US742135
    • 1996-10-31
    • David H. DaviesThomas M. CoughlinBeverley R. Gooch
    • David H. DaviesThomas M. CoughlinBeverley R. Gooch
    • G11B5/667G11B5/712G11B5/716G11B5/66B32B7/02
    • G11B5/712G11B5/716Y10S428/90Y10T428/12465Y10T428/24942Y10T428/2495Y10T428/265Y10T428/2991
    • The flexible, particulate magnetic storage medium includes a substrate and a magnetic storage layer of hard magnetic particles held within a binder. The flexible, particulate magnetic storage medium also includes a soft magnetic keeper layer. The soft magnetic keeper layer may be established by coating the individual hard magnetic particles of the magnetic storage layer with a layer of soft magnetic material to establish a "keeper layer" around each particle. A break layer of non-magnetic material may be provided between the hard and soft layers. The individual particles are coated by methods such as in situ precipitation. The soft magnetic layer may also be established by providing a separate layer of soft magnetic material within a binder of cross linkable resins. The resulting flexible, particulate magnetic storage medium is a laminate principally comprising a substrate, a first layer of hard magnetic particles within a binder, and a second layer of soft magnetic particles also within a binder. The laminate medium may be produced through extrusion of binder particle mixes through multi aperture slot die extensions. The flexible, particulate magnetic media may be used in tape or flexible disc formats.
    • 柔性颗粒磁性存储介质包括基材和保持在粘合剂内的硬磁性颗粒的磁存储层。 柔性颗粒磁存储介质还包括软磁保持层。 可以通过用磁性材料层涂覆磁存储层的各个硬磁性颗粒以在每个颗粒周围建立“保持层”来建立软磁性层。 可以在硬层和软层之间提供非磁性材料的断裂层。 通过诸如原位沉淀的方法涂覆各个颗粒。 也可以通过在可交联树脂的粘合剂内提供单独的软磁性材料层来建立软磁性层。 所得到的柔性颗粒状磁性存储介质是主要包括基底,粘合剂内的第一层硬磁性颗粒和粘结剂内的软磁性颗粒的第二层的层压体。 层压介质可以通过粘合剂颗粒混合物通过多孔隙槽模延伸而挤出来生产。 灵活的微粒磁性介质可以以磁带或软盘形式使用。