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    • 67. 发明申请
    • Magnetic transducer with pedestal pole piece structure
    • 具有基座极片结构的磁性换能器
    • US20050007697A1
    • 2005-01-13
    • US10912657
    • 2004-08-04
    • Yimin HsuHugo SantiniNeil SmithMason Williams
    • Yimin HsuHugo SantiniNeil SmithMason Williams
    • G11B5/31G11B5/147
    • G11B5/3116G11B5/3113G11B5/313
    • A magnetic transducer with a write head with one or more coil layers and a pedestal pole piece on P1 is disclosed. In one embodiment the first and second coils and the P1 pedestal are formed on essentially planarized surfaces. The P1 pedestal defines the zero throat height (ZTH) with a 90 degree apex angle which cuts down flux leakage and improves efficiency. The first and second coils are disposed on opposite sides of the gap layer. The write head preferably has upper and lower back flux closure pieces in contact with the pole pieces to complete the back of the yoke. Various combinations of these features allow heads according to the invention to be made with a very short yoke with resulting improved efficiency. In alternative embodiments the coil below the gap layer may be omitted and/or an additional coil above the gap layer may be added.
    • 公开了一种具有一个或多个线圈层的写头和P1上的基座极片的磁换能器。 在一个实施例中,第一和第二线圈和P1基座形成在基本平坦的表面上。 P1基座定义零喉高度(ZTH),90度顶角可以减少漏磁,提高效率。 第一和第二线圈设置在间隙层的相对侧上。 写头优选地具有与极片接触的上下磁通闭合件,以完成磁轭的后部。 这些特征的各种组合使得根据本发明的头部具有非常短的轭,从而提高效率。 在替代实施例中,间隙层下面的线圈可以被省略和/或可以添加间隙层上方的附加线圈。