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    • 9. 发明申请
    • SEALING GLASS FOR MAGNETIC HEAD AND MAGNETIC HEAD USING THE SAME
    • 使用相同的磁头和磁头密封玻璃
    • WO01003128A1
    • 2001-01-11
    • PCT/JP2000/004268
    • 2000-06-29
    • C03C8/24G11B5/127G11B5/133G11B5/187G11B5/23G11B5/235
    • C03C8/245G11B5/1272G11B5/1276G11B5/1335G11B5/1878G11B5/232G11B5/235
    • A sealing glass for the front gap side of a magnetic head comprising 13 to 17 wt % of SiO2, 5 to 6.8 wt % of B2O3, 70 to 77 wt % of PbO, 0.1 to 5 wt % of at least one of Al2O3 and ZnO, and 0.1 to 3 wt % of at least one of Na2O and K2O; and a sealing glass for the back gap side of a magnetic head comprising 3 to 9 wt % of SiO2, 11 to 17 wt % of B2O3, 66 to 77 wt % of PbO and 3 to 15 wt % of at least one of Al2O3 and ZnO. These types of sealing glass can be used for providing a high performance magnetic head having high strength in high yield. The conventional types of sealing glass for a magnetic head have compositions which render the sealing glass to be easy to crystallize and be poor in strength, and thus have a problem that they are prone to suffer the occurrence of cracking by an impact when a head chip is manufactured by cutting and grinding, in a recent production process wherein a magnetic head having a narrow track and a narrow gap which corresponds to a high density recording is manufactured with high accuracy.
    • 用于磁头的前间隙侧的密封玻璃,其包含13至17重量%的SiO 2,5至6.8重量%的B 2 O 3,70至77重量%的PbO,0.1至5重量%的至少一种Al 2 O 3和ZnO ,和0.1〜3重量%的Na 2 O和K 2 O中的至少一种; 以及用于磁头的背隙侧的密封玻璃,其包含3至9重量%的SiO 2,11至17重量%的B 2 O 3,66至77重量%的PbO和3至15重量%的至少一种Al 2 O 3和 氧化锌。 这些类型的密封玻璃可用于以高产率提供高强度的高性能磁头。 用于磁头的常规类型的密封玻璃具有使密封玻璃易于结晶并且强度差的组成,因此存在如下问题:当头部芯片 通过切割和研磨制造,在最近的制造方法中,其中以高精度制造具有对应于高密度记录的窄轨道和窄间隙的磁头。