Matsushita Electric Industrial Co., Ltd.

Mitsuhisa Fujiki

Tetsuya Okana

Shinya Ogasawara

Satoshi Yamabayashi

Masayuki Hino

Hiroshi Yoda

Suekazu Kugioka

Takeshi Omiya

A magnetic head is manufactured by grinding a head chip ( ) with a gap depth (GD ) to remove its margin ( ) until the gap depth becomes a final gap depth (GD ). The gap depth (GD ) is 25 microns or thinner. The method increases yield and productivity in the manufacture of a high performance magnetic head with a decreased gap depth (GD ), which satisfies the standards of both the gap depth (GD ) and the distance between the head gap and the outermost point of the chip front.

Method of manufacturing magnetic head, and magnetic recording and reproducing apparatus

In processing a head unit in which a head relative height Y is Y&prime; with a grinding amount &Dgr;GD of &Dgr;GD&prime;, the relationship between distances Bo between a vertex of a curved surface as a front face of a head chip and a head gap before and after grinding the front face of the head chip and a gap depth dimension GD, is predetermined with respect to a head unit in which the head relative height is substantially equal to Y&prime;, through which Bo as the value of Bo before grinding corresponding to a target value of the value of Bo after grinding is determined and used as Bo of the head unit in which the head relative height Y is Y&prime;. Thus, grinding of the front face of the head chip is conducted after Bo corresponding to the target value is determined. Hence, a head unit with the value of Bo after grinding falling within the range of standard values can be manufactured efficiently, and accordingly the yield can be improved.

Method of manufacturing a head unit

A method of manufacturing the front surface shape of plural magnetic heads precisely in batch in a desired dimension After fixing plural magnetic heads,and preliminarily processing curved surfaces along the sliding direction S on a rotary member,, the curved surfaces Ts along the thickness direction T orthogonal to the sliding direction S of the magnetic heads,are formed in batch by finish polishing process by means of abrasive tape or the like.

Rotary head device, magnetic head unit and manufacturing method thereof

Magnetic head device having an intermediate member for adjusting a

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Ikoma, Japan

Mitsuhisa Fujiki