Dynamic magnetic information storage or retrieval – Head – Head surface structure
Patent
1987-01-06
1989-02-07
Wolff, John H.
Dynamic magnetic information storage or retrieval
Head
Head surface structure
360119, 360120, G11B 522, G11B 525
Patent
active
048033383
ABSTRACT:
In a magnetic head employing a metallic ferromagnetic material for portions defining a transducing gap, an oxide film or carbide film and a nonmagnetic metal film are provided in this order on each of track width narrowing grooves, and glass is packed on the nonmagnetic metal film, thereby preventing the deteriorations of magnetic characteristics ascribable to the reaction between the metallic ferromagnetic material and the glass and the production of bubbles ascribable to the reaction between the protective films and the glass, and to achieve the enhancements of recording and reproducing characteristics, the prevention of damages to a recording medium surface, the increase of a head lifetime and the rise of the available percentage of manufacture of the heads. When a glass film is further provided on the nonmagnetic metal film and the glass is packed thereon, more excellent effects are achieved.
REFERENCES:
patent: 3354540 (1967-11-01), Duinker
patent: 4361860 (1982-11-01), Nozawa
patent: 4559572 (1985-12-01), Kumasaka et al.
patent: 4682256 (1987-07-01), Ayabe
Kumasaka Noriyuki
Morikawa Juichi
Otomo Shigekazu
Yamashita Takeo
Zama Hideo
Hitachi , Ltd.
Wolff John H.
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