专利名称：Grooved magnetic substrates and method
for producing the same
发明人：Toshiaki Wada,Yoshiaki Katsuyama,Junichi
Nakaoka
申请号：US06/888873申请日：19860724公开号：US04777074A公开日：19881011
摘要：A grooved magnetic substrate including an alumina film layer having a Knoophardness of 600 kg/mm.sup.2 to 1200 kg/mm.sup.2 charged in at least one grooveformed in a surface of a magnetic substrate. The magnetic substrate may be Mn-Zn orNiZn base ferrite. The alumina film layer is formed by sputtering.
申请人：SUMITOMO SPECIAL METALS CO., LTD.
代理机构：Burns, Doane, Swecker & Mathis
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