| 摘要 |
PURPOSE:To record and reproduce signals with high frequency and high density by adjusting the total thickness of a laminate to thicker than the desired track width, and controlling the track width by notched grooves provided on both sides of a gap part. CONSTITUTION:A metallic magnetic thin film 2 of an amorphous magnetic alloy or 'Sendust(R)' having high saturation magnetic flux density and an electrical insulating thin film 3 are alternately formed on a head substrate 5 by sputtering, etc. so that the total thickness is controlled to thicker than the desired track width, and the laminate 1 is formed. Plural head substrates 5 on which the laminate 1 is formed are laminated and bonded with glass, etc. The laminate 1 is formed thicker than the track width plus its variance. Since the track width is controlled by the notched groove 6, the track width and pitch are determined by the working precision of the groove. Since glass is filled around the gap, a high-precision and stable gap is obtained. Consequently, a magnetic head for high frequency wherein signals can be recorded even with a high-coercive force medium and even high-frequency signals can be reproduced with high efficiency is obtained.
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