Thin-film magnetic head having a thin-film coil and method of manufacturing same
AssigneeTDK Corporation
InventorYoshitaka Sasaki
Life of this patent
Estimating the term…
Abstract
A recording head has a bottom pole layer and a top pole layer that include pole portions opposed to each other, a recording gap layer being placed between the pole portions. The recording head further has a thin-film coil. A raised portion is formed on a top surface of the recording gap layer in a region where a connecting portion of the thin-film coil is to be located. The coil is formed such that the connecting portion is formed on top of the raised portion. An insulating layer covers the coil and a top surface of the insulating layer is flattened. The connecting portion of the coil is only exposed from the top surface of the insulating layer. A conductive layer to be a lead is connected to the exposed connecting portion.
Claims4
A thin-film magnetic head comprising:
- a medium facing surface that faces toward a recording medium;
- a first magnetic layer and a second magnetic layer magnetically coupled to each other and including magnetic pole portions opposed to each other and placed in regions of the magnetic layers on a side of the medium facing surface, each of the magnetic layers including at least one layer;
- a gap layer provided between the pole portions of the first and second magnetic layers;
- a thin-film coil at least a part of which is placed between the first and second magnetic layers, the at least part of the coil being insulated from the first and second magnetic layers;
- and a lead connected to the thin-film coil, the coil being formed on a flat surface and having a first portion connected to the lead, and a second portion that is other than the first portion, the head further comprising:
- an auxiliary layer disposed between the flat surface and the first portion of the coil, for making a distance between the flat surface and the first portion greater than a distance between the flat surface and the second portion;
- and
- an insulating layer covering the second portion and having a first surface that touches the flat surface and a second surface, opposite to the first surface, that touches the lead,
- wherein the second surface is flattened so that the first portion is exposed adjacent to the second surface.
A thin-film coil element comprising:
- a thin-film coil formed on a flat surface and having a first portion connected to a lead, and a second portion that is other than the first portion;
- an auxiliary layer disposed between the flat surface and the first portion of the coil, for making a distance between the flat surface and the first portion greater than a distance between the flat surface and the second portion;
- and
- an insulating layer covering the second portion and having a first surface that touches the flat surface and a second surface, opposite to the first surface, that touches the lead,
- wherein the second surface is flattened so that the first portion is exposed adjacent to the second surface.
Dependencies are inferred from the claim text.