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    • 42. 发明授权
    • Magnetic head
    • 磁头
    • US5936815A
    • 1999-08-10
    • US931743
    • 1997-09-16
    • Seiji KumagaiJunichi HondaNorikatsu FujisawaKyu Kanno
    • Seiji KumagaiJunichi HondaNorikatsu FujisawaKyu Kanno
    • G11B5/31G11B5/127G11B5/187G11B5/23G11B5/147
    • G11B5/1276G11B5/1878G11B5/127G11B5/1272
    • A thin film type magnetic head that electromagnetic conversion efficiency is improved by making gradually magnetic resistance larger with approaching to a magnetic gap can be provided. There is disclosed a magnetic head including a pair of magnetic core half members having nonmagnetic substrates and magnetic metal films formed on the nonmagnetic substrates and a coil formed at a concave part by a thin film forming process, the pair of magnetic core half members being jointed to each other opposite to each other through a magnetic gap formed between the respective magnetic metal films, the concave part formed on the surface formed by joining at least one of the magnetic metal films and the other magnetic metal film, wherein assistant cores consisting of magnetic materials are joined on the side of the surface by joining a pair of nonmagnetic substrates and the magnetic metal films are formed connected with the assistant cores.
    • 可以提供通过使接近磁隙逐渐变大的磁阻来提高电磁转换效率的薄膜型磁头。 公开了一种磁头,其包括具有非磁性基板的一对磁芯半部件和形成在非磁性基板上的磁性金属膜,以及通过薄膜形成工艺在凹部形成的线圈,所述一对磁芯半体连接 通过形成在各个磁性金属膜之间的磁隙彼此相对,通过接合至少一个磁性金属膜和另一个磁性金属膜形成的表面上形成的凹部,其中由磁性金属膜组成的辅助芯 材料通过连接一对非磁性基底而在表面的一侧接合,并且形成与辅助芯相连接的磁性金属膜。
    • 43. 发明授权
    • Magnetic head
    • 磁头
    • US5475551A
    • 1995-12-12
    • US272324
    • 1994-07-08
    • Junichi HondaSeiji KumagaiNorikatsu FujisawaMasatoshi HayakawaMasahiro KikkawaMiho Suzuki
    • Junichi HondaSeiji KumagaiNorikatsu FujisawaMasatoshi HayakawaMasahiro KikkawaMiho Suzuki
    • G11B5/133G11B5/187G11B5/193G11B5/23G11B5/235
    • G11B5/235G11B5/193
    • A magnetic head has a pair of magnetic core substrates formed of an oxide magnetic material, at least one of the magnetic core substrates having a gap film formed on an abutment surface thereof, the pair of magnetic core substrates being abutted to each other on the gap film as abutment surfaces, having a magnetic gap formed between them. The gap film is formed of platinum, the platinum group, or an alloy consisting mainly of platinum or the platinum group. The pair of magnetic core substrates are bonded to each other to be integrated into one unit by a non-magnetic glass. The magnetic gap has a track width of not greater than 50 .mu.m. The gap film has a thickness of not greater than 150 nm. The magnetic head includes a pair of magnetic core substrates formed of an oxide magnetic material, at least one of the magnetic core substrates having a gap film formed on an abutment surface thereof, the pair of magnetic core substrates being abutted to each other on the gap film as abutment surfaces, having a magnetic gap formed between them. The gap film is selectively formed of Cr or an alloy consisting mainly of Cr, Ti or an alloy consisting mainly of Ti, or Ta.sub.2 O.sub.5 or an oxide consisting mainly of Ta.sub.2 O.sub.5. At least one of the pair of magnetic core substrates has its abutment surface inversely sputtered and then has a gap film formed thereon.
    • 磁头具有由氧化物磁性材料形成的一对磁芯基板,所述磁芯基板中的至少一个在其邻接表面上形成有间隙膜,所述一对磁芯基板在间隙上彼此抵接 膜作为邻接表面,在它们之间形成有磁隙。 间隙膜由铂,铂族基团或主要由铂或铂族组成的合金形成。 一对磁芯基板通过非磁性玻璃彼此结合成一个单元。 磁隙具有不大于50μm的轨道宽度。 间隙膜的厚度不大于150nm。 磁头包括由氧化物磁性材料形成的一对磁芯基板,至少一个磁芯基板在其邻接表面上形成有间隙膜,该一对磁芯基板在间隙上彼此抵接 膜作为邻接表面,在它们之间形成有磁隙。 间隙膜由Cr或主要由Cr,Ti或主要由Ti或Ta2O5组成的合金或主要由Ta 2 O 5组成的氧化物组成的合金选择性地形成。 所述一对磁芯基板中的至少一个具有抵靠面反向溅射,然后在其上形成间隙膜。