Matsushita Electric Industrial Co., Ltd.

Tetsuya Okana

Mitsuhisa Fujiki

Shinya Ogasawara

Satoshi Yamabayashi

Hiroshi Yoda

Masayuki Hino

Suekazu Kugioka

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.

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Hirakata, Japan

Tetsuya Okana