US 4,068,272 A · High sensitivity magnetic head using magneto-resistive effect element

Abstract

This invention provides a high sensitivity magnetic head using magneto-resistive effect elements consisting of ferromagnetic thin plates and allows construction of a high precision multi-track head by using thin film and photo-etching techniques. The magnetic head comprises a base, two flux converging cores forming a magnetic gap, a detecting portion provided between the two flux converging cores and extending at right angles to the end of the base, one end of the detecting portion being located in the neighborhood of the gap and having a smaller sectional area than the other portions, and detecting electrodes provided at the opposite ends of the detecting portion. At least one of the two cores is of a ferromagnetic material and integrally formed on the base.

Claims8

Dependent claims

A magnetic head comprising a base having a surface and an end face;

first and second flux converging cores, at least one of said cores defining a magnetic gap;
a detecting portion having a cross-sectional area smaller than that of either of said first and second flux converging cores connecting said cores and extending at right angles to the end face of said base, said detecting portion having one end located in the neighborhood of said magnetic gap and being in parallel magnetically with said gap;
and detecting electrodes coupled to the oposite ends of said detecting portion, said detecting portion and at least one of said first and second cores being of a ferromagnetic conductive material and integrally formed on the surface of said base.

Dependencies are inferred from the claim text.

Facts

Application

05/632,761Filed 17 Nov 1975

Priority

JA 49-13397519 Nov 1974

Granted

10 Jan 1978

Term ends

Not estimatedThe source records don’t support an estimate.

Classification5 codes

G11B 5/3925
The read-out elements being disposed in magnetic shunt relative to at least two parts of the flux guide structure: the two parts being thin films
G11B 5/3903
Using magneto-resistive devices or effects: using magnetic thin film layers or their effects, the films being part of integrated structures
G11B 5/3977
With a plurality of independent magnetoresistive active read-out elements for respectively transducing from selected components: from different…
G11B 5/398
Using magnetic thin film layers or their effects, the films being part of integrated structures: specially shaped layers

High sensitivity magnetic head using magneto-resistive effect element

Life of this patent

High sensitivity magnetic head using magneto-resistive effect element

Life of this patent

Abstract

Claims8