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EP0459404A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Magnetoresistance-effect thin film head

Assignee: Sony Corp
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Filing: 1991-05-28
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Granted: —
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Expires: 2011-05-28
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Abstract

Abstract A magnetoresistance-effect thin film head (11) comprises a substrate (12), a magnetic field sensing element (13) provided on the substrate (12), an electrode layer (15) having portions respectively extending from the opposite ends of the magnetic field sensing element (13) to apply a sense current to the magnetic field sensing element (13) so that the sense current will flow in the direction of a signal magnetic field, an insulating layer (14) formed over the magnetic field sensing element (13), a bias magnetic field creating conductor (16) formed on the insulating (14) layer so as to extend across the magnetic field sensing element (13), and a magnetic shielding layer (19) shielding the magnetic field sensing element (13). At least a portion of the electrode layer (15) and a portion of the bias magnetic field creating conductor (16) are included in a conductive pattern (17).

Inventors

  • 👤 Takuji C/O Sony Magnetic Shibata

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-08 14:04
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/127; G11B5/33; G11B5/39; G11B5/3903; G11B5/31; G11B5/3103; G11B5/3106; G11B5/40

Claims Analysis

Total Claims: 2
Claim 1
Independent Claim 146 words
A magnetoresistance-effect thin film head (11) comprising: a substrate (12); a magnetic field sensing element (13) provided on the substrate (12); an electrode layer (15) having portions respectively extending from the opposite ends of the magnetic field sensing element (13) to supply a sense current to the magnetic field sensing element (13) so that the sense current will flow in the direction of a signal magnetic field; an insulating layer (14) formed over the magnetic field sensing element (13); a bias magnetic field creating conductor (16) formed on the insulating layer (14) so as to extend across the magnetic field sensing element (13); and a magnetic shielding layer (19) shielding the magnetic field sensing element (13); characterized in that at least a portion of the electrode layer (15) and a portion of the bias magnetic field creating conductor (16) are included in a conductive pattern (17).
Claim 2
Dependent Claim 157 words
A magnetoresistance-effect thin film (21) head comprising: a substrate (12); a magnetic field sensing element (13) provided on the substrate (12); an electrode layer having (15) portions respectively extending from the opposite ends of the magnetic field sensing element (13) to supply a sensing current to the magnetic field sensing element (13) so that the sense current will flow in the direction of a signal magnetic field; an insulating layer (14) formed over the magnetic field sensing element (13); a bias magnetic field creating conductor (16) formed on the insulating layer (14) so as to extend across the magnetic field sensing element (13); and a magnetic shielding layer (19) formed over the magnetic field sensing element (13); characterized in that the electrode layer (15) consists of a principal conductive metal conductor (27) and a moisture-resistant conductor (26), and a portion of the electrode layer (15) contiguous with the sliding surface is formed of the moisture-resistant conductor (26).

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