| 摘要 |
<p>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. <IMAGE></p> |
