Headway Technologies, Incorporated

Sae Magnetics (h.k.) Limited

Takehiro Horinaka

Yoshitaka Sasaki

Shigeki Tanemura

Kazuo Ishizaki

Hironori Araki

Hiroyuki Itoh

Hiroyuki Ito

Tatsushi Shimizu

Takehiro Kamigama

Erhard Theodor Schreck

Kazuki Sato

Lijie Guan

Kowang Liu

Tatsuya Shimizu

Kazumasa Yasuda

A method of manufacturing a magnetic head includes the steps of: forming a pole-layer-encasing layer having a pole-layer-encasing section; and forming a pole layer in the pole-layer-encasing section. The pole layer includes a first layer, and a second layer formed thereon. The step of forming the pole layer includes the steps of: forming an initial first layer by physical vapor deposition; etching the surface of the initial first layer by dry etching so that the initial first layer becomes the first layer; and forming the second layer on the first layer.

Method of manufacturing a magnetic head for perpendicular magnetic recording

A magnetic head includes a pole layer accommodated in a groove. The pole layer has a track width defining portion and a wide portion. The pole layer includes a plurality of magnetic films stacked. At least one of the plurality of magnetic films includes a first portion included in the track width defining portion, a second portion included in the wide portion, and a third portion coupling the first and second portions to each other. In a cross section passing through the center of the pole layer taken in the track width direction, the second portion is smaller than the first portion in thickness and the top surface of the third portion is inclined with respect to a direction perpendicular to a medium facing surface.

Magnetic head for perpendicular magnetic recording having a pole layer including a plurality of stacked magnetic films

A manufacturing method for a heat-assisted magnetic recording head includes the step of forming an internal mirror that includes a reflecting film support body and a reflecting film. The reflecting film support body includes first and second inclined surfaces. The reflecting film includes first and second portions that are located on the first and second inclined surfaces, respectively. The step of forming the internal mirror includes the step of forming the reflecting film support body and the step of forming the reflecting film. The step of forming the reflecting film support body forms an initial support body, and performs two taper-etching processes on the initial support body so that the initial support body is provided with the first and second inclined surfaces.

Method of manufacturing heat-assisted magnetic recording head with internal mirror

A near-field light generator includes: a waveguide; a clad layer having a penetrating opening and disposed on the waveguide; a plasmon generator accommodated in the opening; and a dielectric film interposed between the plasmon generator and each of the waveguide and the clad layer. In a method of manufacturing the near-field light generator, an initial clad layer is initially formed on the waveguide, and then the initial clad layer is taper-etched by RIE to form a recess that does not reach the top surface of the waveguide. Subsequently, the recess is etched by wet etching until the top surface of the waveguide is exposed in part. Next, the dielectric film is formed in the opening, and the plasmon generator is formed on the dielectric film.

Method of manufacturing near-field light generator including waveguide and plasmon generator

In a sensing unit according to the present invention, a spring portion having a support portion and a movable portion is conductive. A signal of a sensor portion provided on the movable portion of the spring portion is transmitted via the spring portion. Hence, the sensing unit according to the present invention has a simple constitution with a small number of components, and a wire does not necessarily have to be provided for each sensor portion. As a result, a reduction in manufacturing cost, simplification of the manufacturing process, and so on are achieved.

Method of making a sensing unit

A magnetic head includes a main magnetic pole, a shield having an end face located in a medium facing surface to wrap around an end face of the main magnetic pole, and a gap part provided between the main magnetic pole and the shield. The shield includes a bottom shield, two side shields, and a top shield. The gap part includes first and second gap layers. In a manufacturing method of the magnetic head, a mold is formed on the top surface of the bottom shield, the mold having a shape determined by photolithography and being intended to be removed later. Next, the two side shields are formed on the top surface of the bottom shield by performing plating without forming a seed layer. Next, the mold is removed and then the first gap layer, the main magnetic pole, the second gap layer, and the top shield are formed in succession.

Magnetic head for perpendicular magnetic recording with shield around main magnetic pole

A magnetic head includes a side shield layer and an encasing layer. The side shield layer has a first end face located in the medium facing surface, a second end face opposite to the first end face, and a first groove accommodating a portion of a pole layer. The first end face includes two portions located on both sides of an end face of the pole layer that are opposite to each other in a track width direction. The encasing layer is formed of a nonmagnetic material and disposed on a side of the side shield layer opposite to a medium facing surface. The encasing layer has a front end face touching the second end face of the side shield layer, and a second groove accommodating another portion of the pole layer. The distance from the medium facing surface to an arbitrary point on the second end face of the side shield layer decreases with decreasing distance from the arbitrary point to the top surface of a substrate.

Magnetic head for perpendicular magnetic recording having side shield layer and method of manufacturing same

A heat-assisted magnetic recording head has an internal mirror that includes a reflecting film support body and a reflecting film. The internal mirror reflects light that comes from above a waveguide so that the reflected light travels through the waveguide toward a medium facing surface. The reflecting film support body includes first and second inclined surfaces. The reflecting film includes first and second portions that are located on the first and second inclined surfaces, respectively. The step of forming the reflecting film support body includes two-taper etching operations to be performed on an initial support body.

Heat-assisted magnetic recording head including internal mirrors of first and second inclined surfaces

A magnetic head includes a pole layer, and an encasing layer having a groove that accommodates the pole layer. A manufacturing method for the magnetic head includes the steps of forming a nonmagnetic layer that will later undergo formation of the groove therein and will thereby become the encasing layer; forming the groove in the nonmagnetic layer so that the nonmagnetic layer becomes the encasing layer; and forming the pole layer such that the pole layer is accommodated in the groove of the encasing layer. The nonmagnetic layer is formed of AlO. The step of forming the groove in the nonmagnetic layer includes the step of taper-etching the nonmagnetic layer by reactive ion etching with an etching gas containing at least BCland Namong BCl, Cland N.

Method of manufacturing magnetic head for perpendicular magnetic recording

A magnetic head includes a coil, a pole layer, and a coil adjacent layer. The coil includes a winding portion having two side surfaces. The coil adjacent layer is adjacent to at least part of the whole of the two side surfaces of the winding portion. The coil adjacent layer is formed of a nonmagnetic material having a linear thermal expansion coefficient of 5&#xd7;10/&#xb0; C. or smaller at a temperature of 25&#xb0; C. to 100&#xb0; C. and having a thermal conductivity of 40 W/m&#xb7;K or higher at a temperature of 25&#xb0; C.

Magnetic head that suppresses protrusion of medium facing surface caused by heat of coil

A method of manufacturing the magnetic head includes the steps of: forming the pole-layer-encasing layer; forming an initial nonmagnetic layer in the groove of the pole-layer-encasing layer by physical vapor deposition, the initial nonmagnetic layer being intended to become the nonmagnetic layer later by undergoing etching of a surface thereof; etching the surface of the initial nonmagnetic layer by dry etching so that the initial nonmagnetic layer becomes the nonmagnetic layer; and forming the pole layer in the pole-layer-encasing section formed by the nonmagnetic layer.

A thin-film magnetic head including a structure in which a main magnetic pole layer including a magnetic pole end part on a side of a medium-opposing surface opposing a recording medium, a write shield layer opposing the magnetic pole end part so as to form a recording gap layer on the medium-opposing surface side, and a thin-film coil wound about the write shield layer or main magnetic pole layer are laminated. The main magnetic pole layer is incorporated in a magnetic pole forming depression of a base insulating layer, the magnetic pole forming depression being sunken into a form corresponding to the main magnetic pole layer. The thin-film magnetic head has a remnant insulating film, formed on the outside of the magnetic pole forming depression so as to substantially surround the magnetic pole forming depression, covering the base insulating layer.

Thin-film magnetic head having remnant coating and remnant insulating film, head gimbal assembly and hard disk drive

The present invention has a configuration which allows manufacturing a capacitor including a first electrode layer, conductive first convex sections layered on a surface of the first electrode layer, a first dielectric layer formed on a surface of the first convex sections and a surface of the first electrode layer, and a second electrode layer formed so as to be superimposed on the first convex sections and the first electrode layer via the first dielectric layer.

Capacitor and method of manufacturing the same and capacitor unit

A magnetic head includes a pole layer and a shield. The shield includes a shield layer having a front end face located in the medium facing surface at a position forward of an end face of the pole layer along a direction of travel of the recording medium. The magnetic head further includes a stopper layer for suppressing protrusion of the front end face of the shield layer, the stopper layer being disposed adjacent to the shield layer and made of a nonmagnetic material having a linear thermal expansion coefficient of 5&#xd7;10/&#xb0; C. or smaller at a temperature of 25&#xb0; C. to 100&#xb0; C.

Magnetic head for perpendicular magnetic recording including a stopper layer for suppressing protrusion of the front end face of a shield

A top surface of a pole layer of a magnetic head includes: a first portion having a first edge located in a medium facing surface and a second edge opposite thereto; and a second portion located farther from the medium facing surface than the first portion and connected to the first portion at the second edge. The distance from a substrate to an arbitrary point on the first portion increases with increasing distance from the medium facing surface to the arbitrary point. The angle of inclination of the first portion taken at the arbitrary point with respect to a direction perpendicular to the medium facing surface increases stepwise or continuously with increasing distance from the medium facing surface to the arbitrary point. The angle of inclination taken at the first edge is greater than zero degree. The second portion extends in a direction substantially perpendicular to the medium facing surface.

Growing community of inventors

Milpitas, CA, United States of America

Takehiro Horinaka