Dynamic magnetic information storage or retrieval – Head – Head surface structure
Patent
1994-09-19
1996-01-16
Turner, Archene
Dynamic magnetic information storage or retrieval
Head
Head surface structure
360102, 428143, 428212, 428323, 428325, 428697, 428699, 428701, 428702, C04B 3536
Patent
active
054853354
ABSTRACT:
There is disclosed a magnetic head particularly suited for high frequency applications. The head has a ceramic body of a new ceramic material which provides longer service life together with a high level of operating efficiency and cost effectiveness. The head includes a core of magnetic material, such as thin layers of the metal FeAlSi, bonded to pieces of the ceramic material. The coefficients of thermal expansion of the ceramic and the core are suitably matched to permit wide temperature excursions (e.g., 500.degree. C.) during manufacture of the head. The ceramic is a matrix of a material such as a metal titanate in which are distributed hard inclusions such as a metal oxide which are tightly bound to the matrix to preclude pull out of the inclusions during machining of the ceramic. The wear resistance and other characteristics of the magnetic head are greatly improved compared to a comparable head made with manganese nickel oxide ceramic, for example.
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patent: 5031064 (1991-07-01), Ashikawa et al.
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Eastman Kodak Company
Noval William F.
Turner Archene
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