| 摘要 |
PROBLEM TO BE SOLVED: To prevent leakage of magnetic flux and to improve core efficiency per inductance by forming depth confirming groove parts of a magnetic gap on magnetic core half bodies nearly parallel to a medium slide surface so that front butt surfaces are notched, and its both end are faced to both side surfaces of core half bodies and filling up conductive material showing non-magnetism in the groove part. SOLUTION: The groove part 18 as a depth marker deciding the depth zero position 13a of the front gap 13 is formed for precisely and easily reading the depth B being the depth from the slide surface 9 of the front gap 13. The groove part 18 is formed nearly parallel to the slide surface 9 so that the front butt surfaces of a pair of core half bodies are notched, and its both end are faced to both end surfaces of a magnetic head. The conductive material 19 showing the non-magnetism such as Cu is filled up in the groove part 18, and the leakage of the magnetic flux generated in the magnetic core on the groove part 18 is prevented, and the magnetic flux is made to flow convergently through the front gap 13 to reduce the inductance.
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