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US 2004/0057154 A1Published application
Magnetic head having first core and second core bonded together and manufacturing method therefor
AssigneeAlps Electric Co., Ltd.
InventorsKatsuya Kikuiri, Hideo Itakura
Life of this patent
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Abstract
A magnetic head and a manufacturing method for the same are provided. An abutting plane is formed on a first core, and the abutting plane is butted to a bonding surface of a second core. This allows the first core and the second core to be brought partly into surface contact with each other, and the abutting plane to be planarly machined with high accuracy. Hence, the planar bondability of the first core and the second core can be improved, and the bonding strength can be uniformly enhanced.
Claims13
A magnetic head comprising:
- a first core having a thin film magnetic head;
- and
- a second core bonded to the first core from a surface whereon the thin film magnetic head is formed,
- a magnetic gap of the thin film magnetic head being exposed on a medium opposing surface of the first core and the second core,
- wherein a bonding surface of at least one of the first core and the second core is provided with at least one abutting plane that juts out toward the other bonding surface and a groove formed to have a predetermined depth with a step provided between itself and the abutting plane,
- the abutting plane and the bonding surface of the other core are butted against each other,
- an adhesion layer of a predetermined thickness is provided at least between the groove and the bonding surface of the other core, and
- the first core and the second core are bonded.
5 more elements
A manufacturing method for a magnetic head comprising the steps of:
- (a) forming a plurality of thin film magnetic heads on a first substrate, then cutting the first substrate into a bar with a plurality of thin film magnetic heads aligned thereon in the longitudinal direction to form a first bar;
- (b) cutting a second substrate into a bar to form a second bar;
- (c) defining the surface of the first bar whereon the thin film magnetic heads are formed as the surface to be bonded to the second bar, protuberantly forming at least one or more abutting planes on the boding surface of at least one of the first bar or the second bar at positions where they will remain in cores when the bars are cut into individual cores in a subsequent step, and forming a groove with a predetermined depth with a step provided between itself and the abutting plane,
- (d) abutting the abutting plane formed on at least one bar against the bonding surface of the other bar, setting the bars in parallel to each other, and forming an adhesion layer of a predetermined thickness between the groove formed in at least one bar and the bonding surface of the other bar to bond the first bar and the second bar;
- and
- (e) cutting the first bar and the second bar into cores at between the individual thin film magnetic heads to produce a magnetic head having the first core and the second core bonded through the intermediary of the adhesion layer and a magnetic gap of the thin film magnetic head being exposed on the medium opposing surface of the first core and the second core.
3 more elements
Dependencies are inferred from the claim text.