EP0081239A2
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Magnetic head
Assignee: Panasonic Holdings Corp
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Filing: 1982-12-08
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Granted: —
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Expires: 2002-12-08
Abstract
Abstract The invention provides a magnetic head having a core which includes a thin amorphous alloy film having a composition of Co a M b T c X d , for 70≤ a ≤ 95,0 ≤b ≤ 20,3 ≤ c ≤20,0≤d<10,and a+b+c+d=100,where M is at least one metal selected from the group consisting of Fe, Ni, Cr, Mo, W and Mn, T is at least one metal selected from the group consisting of Ti, Zr, Hf, Nb and Ta, and X is at least one material selected from the group consisting of Si, B, C, Al and Ge; and a substrate having excellent resistance to wear and having the thin amorphous alloy film on a major surface thereof, wherein the thin amorphous alloy film is located at least in a portion adjacent a magnetic gap portion of the core which slidably contacts a magnetic recording medium is made of an amorphous alloy.
Inventors
- 👤 Hiroshi Sakakima
- 👤 Mitsuo Satomi
- 👤 Yukihiro Yanagiuchi
- 👤 Harufumi Senno
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-03 08:21
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/127; G11B5/31; G11B5/3103; G11B5/3106
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
132 words
A magnetic head comprising a core which includes a thin amorphous alloy film having a composition of Co a M b T c X d , for 70 < a < 95, 0 <b <20, 3 < c < 20, 0 ≤ d < 10, and a + b + c + d = 100, where M is at least one metal selected from the group consisting of Fe, Ni, Cr, Mo, W and Mn, T is at least one metal selected from the group consisting of Ti, Zr, Hf, Nb and Ta, and X is at least one material selected from the group consisting of Si, B, C, Al and Ge; and a substrate having excellent resistance to wear and having said thin amorphous alloy film on a major surface thereof.
Claim 2
Dependent Claim
132 words
A magnetic head comprising a core which includes a thin amorphous alloy film having a composition of Co a M b T c X d , for 70 < a < 95, 0 <b <20, 3 < c < 20, 0 ≤ d < 10, and a + b + c + d = 100, where M is at least one metal selected from the group consisting of Fe, Ni, Cr, Mo, W and Mn, T is at least one metal selected from the group consisting of Ti, Zr, Hf, Nb and Ta, and X is at least one material selected from the group consisting of Si, B, C, Al and Ge; and a substrate having excellent resistance to wear and having said thin amorphous alloy film on a major surface thereof.
Claim 3
Dependent Claim
20 words
A magnetic head according to claim 1, wherein conditions 5 ≤ c ≤ 20 and d = 0 are satisfied.
Claim 4
Dependent Claim
26 words
A magnetic head according to claim 1 or 2, wherein a portion of said core which slidably contacts the magnetic recording medium comprises the amorphous alloy.
Claim 5
Dependent Claim
30 words
A magnetic head according to claim 1 or 2, wherein the thin amorphous alloy film is located at least in a portion adjacent a magnetic gap of the magnetic core.
Claim 6
Dependent Claim
48 words
A magnetic head according to claim 1 or 2, wherein at least one thin ceramic film having excellent resistance to wear and a thickness smaller than a thickness of said thin amorphous alloy film is sandwiched between adjacent ones of a plurality of said thin amorphous alloy films.
Claim 7
Dependent Claim
22 words
A magnetic head according to claim 1 or 2, wherein said thin amorphous alloy film is sandwiched between a pair of substrates.
Claim 8
Dependent Claim
14 words
A magnetic head according to claim 1 or 2, wherein said substrate comprises ferrite.
Claim 9
Dependent Claim
14 words
A magnetic head according to claim 1 or 2, wherein said substrate comprises Sendust.
Claim 10
Dependent Claim
112 words
A magnetic head comprising a core which includes a thin amorphous alloy film having a composition of Co x Nb y M' z T' u for, 75 < x < 92, 8 < y 5 20, 0.1 ≤z ≤ 10, 0 ≤ u ≤ 5, and x + y + z + u = 100, where M' is at least one material selected from the group consisting of Fe, Ni, Cr, Mo, W and Mn, and T' is at least one material selected from the group consisting of Zr, Ta and Ti; and a substrate having excellent resistance to wear and having said thin amorphous alloy film on a major surface thereof.
Claim 11
Dependent Claim
112 words
A magnetic head comprising a core which includes a thin amorphous alloy film having a composition of Co x Nb y M' z T' u for, 75 < x < 92, 8 < y 5 20, 0.1 ≤z ≤ 10, 0 ≤ u ≤ 5, and x + y + z + u = 100, where M' is at least one material selected from the group consisting of Fe, Ni, Cr, Mo, W and Mn, and T' is at least one material selected from the group consisting of Zr, Ta and Ti; and a substrate having excellent resistance to wear and having said thin amorphous alloy film on a major surface thereof.
Claim 12
Dependent Claim
112 words
A magnetic head comprising a core which includes a thin amorphous alloy film having a composition of Co x Zr y M" z T" u for 75 ≤x ≤ 90, 5 ≤ y ≤ 12, 0.1 ≤ z ≤ 10, 5 ≤ u ≤ 10, and x + y + z + u = 100, where M" is at least one material selected from the group consisting of Fe, Ni, Mo, W and Mn, and T" is at least one material selected from the group consisting of Ti, Cr, Ta and Nb; and a substrate having excellent resistance to wear and having said thin amorphous alloy film on a major surface thereof.
Claim 13
Dependent Claim
112 words
A magnetic head comprising a core which includes a thin amorphous alloy film having a composition of Co x Zr y M" z T" u for 75 ≤x ≤ 90, 5 ≤ y ≤ 12, 0.1 ≤ z ≤ 10, 5 ≤ u ≤ 10, and x + y + z + u = 100, where M" is at least one material selected from the group consisting of Fe, Ni, Mo, W and Mn, and T" is at least one material selected from the group consisting of Ti, Cr, Ta and Nb; and a substrate having excellent resistance to wear and having said thin amorphous alloy film on a major surface thereof.
References Cited (Backward Citations)
No citation records indexed.
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