Thin-film magnetic head with a coil having a trapezoidal crosssection
AssigneeHitachi Metals, Ltd.
InventorsKiyoharu Fujita, Takeo Sasaki, Shinji Furuichi
Life of this patent
Estimating the term…
Abstract
A coil construction of a thin film magnetic head that can be manufactured with high yields without forming cavities between the coil layers while preventing short-circuiting between the upper magnetic pole and the coil layers is disclosed. The thin film magnetic head has a recording gap layer provided at the tips of film-shaped lower and upper magnetic poles magnetically connected in the rear portion thereof, and one or more coil layers wound around the rear portion; the coil layers having a convexedly curved upper surface and sides whose inclination angle θ is within the range of 80° to 90°.
Claims10
A thin film magnetic head, having a lower magnetic core and an upper magnetic core disposed facing each other via a non-magnetic thin film serving as a magnetic gap, and
- at least one thin film coil layer insulated by an insulating resin layer between these magnetic gaps and comprising thin film conductors wound on the magnetic core;
- among those thin film coils, at least the thin film conductors constituting a lowermost layer near the lower magnetic core have a trapezoidal cross section that tapers off from the lower magnetic core upward, with the sides of the trapezoidal conductor inclined 80 to 90° inward with respect to the lower magnetic core, and the upper surface thereof curved convexedly.
A thin film magnetic head, having a lower magnetic core and an upper magnetic core disposed facing each other via a non-magnetic thin film serving as a magnetic gap, and
- a plurality of thin film coil layers insulated by insulating resin layers between these magnetic gaps and comprising thin film conductors wound on the magnetic core and arranged in layers;
- the thin film conductors have a trapezoidal cross section that tapers off from the lower magnetic core upward, with the sides of the trapezoidal conductor inclined 80 to 90° inward with respect to the lower magnetic core, and the upper surface thereof curved convexedly.
Dependencies are inferred from the claim text.