| 摘要 |
PROBLEM TO BE SOLVED: To enhance yield and production efficiency by using a low melting point glass having a specified viscosity at the heat treatment temperature of a metallic magnetic thin film diagonally formed on a substrate as a nonmagnetic material for flattening the substrate. SOLUTION: The viscosity of the low melting point glass 30 at the heat treatment temperature of the metallic magnetic thin film is 102-106Pa.s. The glass 30 is melted and perfectly filled all over one principal face of the substrate 21 with magnetic core forming grooves, separation grooves 28 and winding grooves 29 as well as the metallic magnetic thin film. Since the glass 30 is filled at such a temperature that the metallic magnetic thin film ensures good soft magnetic characteristics, the heat treatment of the thin film is made unnecessary. The glass 30 is then solidified by cooling and the surface is ground to flatten the substrate. A terminal for connection to the outside and a thin film coil are formed, nonmagnetic films are diffused to each other and a pair of magnetic core half blocks are integrated by joining to manufacture a magnetic head block.
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