Dynamic magnetic information storage or retrieval – Head – Head surface structure
Reexamination Certificate
2006-02-07
2006-02-07
Tupper, Robert S. (Department: 2652)
Dynamic magnetic information storage or retrieval
Head
Head surface structure
Reexamination Certificate
active
06995948
ABSTRACT:
A magnetoresistive thin-film magnetic head with high corrosion resistance for recording medium having massive capacity is provided by providing a protective film having a thickness of 40 Å or less. Since the distance between the head and the medium is remarkably reduced, the film is suitable for a recording medium having high-packing density. The magnetoresistive type thin-film magnetic head is provided, wherein the following layers are formed on at least the surface of the head facing a recording medium: (A) a lower layer composed of a thin film having the composition represented by the formula selected from the group consisting of:formula (i): SiCXHYOZNWFTBUPV(where X=0.5–26, Y=0.5–13, Z=0–6, W=0–6, T=0–6, U=0–1 and V=0–1, in terms of atomic ratio), and formula (ii): SiHYOZNWFTBUPV(where Y=0.0001–0.7, Z=0–6, W=0–6, T=0–6, U=0–1 and V=0–1); and (B) an upper layer composed of a diamond-like thin film having the composition represented by the following formula: CHaObNcFdBePf(where a=0–0.7, b=0–1, c=0–1, d=0–1, e=0–1 and f=0–1), and the total thickness of the lower layer and the upper layer is 40 Å or less. Also provided are a method for producing the same, and a magnetic head device using the same.
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Marshall & Gerstein & Borun LLP
TDK Corporation
Tupper Robert S.
LandOfFree
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