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    • 3. 发明授权
    • Sealing glass for magnetic head and magnetic head using the same
    • 密封玻璃用于磁头和磁头使用相同
    • US06631050B1
    • 2003-10-07
    • US09786456
    • 2001-06-04
    • Shinya HasegawaTetsuya KamimotoHideo Torii
    • Shinya HasegawaTetsuya KamimotoHideo Torii
    • G11B5235
    • C03C8/245G11B5/1272G11B5/1276G11B5/1335G11B5/1878G11B5/232G11B5/235
    • Because of its composition that is liable to be crystallized and therefore has a low strength, a conventional sealing glass for magnetic head has a problem in that in a manufacturing process for manufacturing a magnetic head having a narrow track width and a short gap length corresponding to the high-density recording in recent years with high accuracy, cracks are liable to be developed in a sealing glass portion by an impact caused in cutting and grinding a head chip. By using glass having a composition of 13 to 17 wt % SiO2, 5 to 6.8 wt % B2O3, 70 to 77 wt % 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 as a front sealing glass and using glass having a composition of 3 to 9 wt % SiO2, 11 to 17 wt % B2O3, 66 to 77 wt % PbO, and 3 to 15 wt % of at least one of Al2O3 and ZnO as a back sealing glass, a high-performance magnetic head having a high strength can be provided in high yields.
    • 由于其组成易于结晶并因此具有低强度,所以传统的磁头密封玻璃的问题在于,在制造具有窄轨道宽度和短间隙长度的磁头的制造过程中 近年来高精度的高密度记录,由于在芯片的切割和研磨中产生的冲击,密封玻璃部分容易产生裂纹。 通过使用组成为13〜17重量%SiO 2,5〜6.8重量%B 2 O 3,70〜77重量%PbO,0.1〜5重量%的Al 2 O 3和ZnO中的至少一种,和0.1〜3重量% 作为前密封玻璃的Na 2 O和K 2 O中的至少一种,使用组成为3〜9重量%SiO 2,11〜17重量%B 2 O 3,66〜77重量%PbO和3〜15重量% Al 2 O 3和ZnO作为后密封玻璃,可以高产率提供高强度的高性能磁头。