Tdk Corporation

Kabushiki Kaisha Toshiba

Sae Magnetics (h.k.) Limited

Taro Oike

Makoto Yoshida

Kiyoshi Noguchi

Hiraku Hirabayashi

Katsuki Kurihara

Shin Narushima

Norikazu Ota

Takamitsu Sakamoto

Atsushi Iijima

Masashi Sano

Hitoshi Iwasaki

Yuzo Kamiguchi

Satoru Araki

Takeo Kagami

Yosuke Antoku

Manabu Ohta

Hiroaki Kawashima

Tetsuo Miyazaki

Hiroyuki Miyamoto

Kazuhiro Saito

Hideaki Fukuzawa

Masashi Sahashi

Masahiro Saito

Isamu Sato

Koichi Terunuma

Haruyuki Morita

Hiromi Fuke

Naoyuki Inoue

Noboru Yamanaka

Naoki Hanashima

Tetsuro Sasaki

Noriyuki Ito

Kenkichi Anagawa

Kenji Inage

Shingo Miyata

Hiroki Matsukuma

Seiji Yari

Kenta Hara

Eric Cheuk Wing Leung

A magnetic head includes a main pole, a write shield, and a return path section. The write shield includes first and second shield portions located on opposite sides of the main pole in the track width direction. The return path section includes first and second yoke portions located on opposite sides of the main pole in the track width direction. The first yoke portion is connected to the first shield portion. The second yoke portion is connected to the second shield portion. A coil surrounds at least part of the entire outer periphery of the main pole when viewed from a medium facing surface.

Magnetic head for perpendicular magnetic recording having a write shield

The present invention relates to a magnetic head, a head assembly, and a magnetic recording/reproducing apparatus which are capable of effectively detecting thermal asperity. The magnetic head according to the present invention includes a heat-generating resistor, a recording coil, and a resistive element. The heat-generating resistor is adapted to generate heat when power is fed thereto so that the heat generation causes at least a part of the air bearing surface to thermally expand and protrude. The recording coil is adapted to generate a recording magnetic field, and the resistive element is disposed closer to the air bearing surface than the recording coil and connected in series or in parallel with the heater. Thus, the resistive element can share a common wiring with the heater for power feeding, which eliminates the waste of wiring and achieves miniaturization.

Magnetic head, head assembly and magnetic recording/reproducing apparatus

A thin-film magnetic head that the protrusion of the head end surface due to heat generated from the heating means becomes large enough to set the magnetic spacing dto the smaller value efficiently is provided. The head comprises: a substrate having an element-formed surface on which at least one concave portion is formed and an ABS; at least one magnetic head element formed above or on the element-formed surface; at least one thermal expansion layer embedded in the at least one concave portion; and at least one heating means positioned directly above the at least one thermal expansion layer.

Thin-film magnetic head with heating means for adjusting magnetic spacing

A thin-film magnetic head that has an improved protrusion efficiency under the condition of not only assuring the reliability of the-heating operation, but also stabilizing the read output is provided. The head comprises: a magnetic head element for writing and/or reading data signals; a heating element for generating heat at least during operations of the magnetic head element; and a first heatsink element provided adjacent to the heating element for receiving a part of the heat generated from the heating element, the first heatsink element being a distance from the magnetic head element.

Thin-film magnetic head with heating element and heatsink

A thin-film magnetic head with a higher protrusion efficiency is provided, which comprises: a substrate with an air bearing surface (ABS); a read head element including a lower and upper shield layers, and a write head element including a magnetic pole layer; a heating element provided in a position opposite to the ABS in relation to the read and write head elements; and a heatsink element including a heatsink layer provided adjacent to an end opposite to an end in the ABS side of at least one layer of the lower and upper shield layers and the magnetic pole layer, the heatsink element having a shape that a pattern width in the track-width direction of an end portion in the ABS side is larger than a pattern width in the track-width direction of an end portion opposite to the end portion in the ABS side.

Thin-film magnetic head having heatsink wider on air bearing surface side

A heat assisted magnetic recording head is provided, which can prevent an effect of a heat in a laser diode when a magnetic recording region is heated by a heating laser beam and which can reduce its size and weight. In the heat assisted magnetic recording head, a recording magnetic pole, a magnetic recording element, a magnetic read element, an optical waveguide, and an irradiating optical waveguide are attached to a floating slider provided below a suspension. The laser diode is arranged on an opposite side of the suspension to the floating slider. The heating laser beam emitted from the laser diode is directed to the irradiating optical waveguide through the optical waveguide, so that a magnetic recording medium is irradiated with the heating laser beam exiting from the irradiating optical waveguide.

Heat assisted magnetic recording head and heat assisted magnetic recording apparatus for heating a recording region in a magnetic recording medium during magnetic recording

A thin-film magnetic head comprising an inductive element including at least: a lower magnetic pole; a write gap layer; and an upper magnetic pole opposed to the lower magnetic pole through the write gap layer, a width Win a track-width direction at a facing-to-magnetic-medium top end of the upper magnetic pole being larger than a width Win the track-width direction at a facing-to-magnetic-medium top end of the lower magnetic pole, and a distance FPDbetween the top end of the upper magnetic pole and a flare point of the upper magnetic pole being smaller than a distance FPDbetween the top end of the lower magnetic pole and a flare point of the lower magnetic pole, is provided.

Thin-film magnetic head, head gimbal assembly with thin-film magnetic head, head arm assembly with head gimbal assembly, magnetic disk drive apparatus with head gimbal assembly and manufacturing method of thin-film magnetic head

A thin-film magnetic head includes a lower magnetic layer, an upper magnetic layer, a recording gap layer, and a thin-film coil. The lower magnetic layer has a first magnetic pole tip layer, and a first yoke layer which is connected to the first magnetic pole tip layer. The first yoke layer has an extended part which is relatively thick and a reduced part which is relatively thin in the area in which the first yoke layer confronts the first magnetic pole tip layer, the extended part being positioned on the side of the air bearing surface. Further, the first magnetic pole tip layer is connected to the first yoke layer at the extended part, and is insulated from the first yoke layer at the reduced part.

Thin-film magnetic head having magnetic layers of different thicknesses and fabrication method for same

A thin-film magnetic head includes at least one inductive write head element and at least one read magnetic head element, capable of controlling a spacing between a magnetic recording medium and the at least one magnetic read head element by heating. A gain SG (nm/&#xb0; C.) of the spacing is greater than a spacing gain threshold SG(nm/&#xb0; C.) defined by the following expression:

Thin-film magnetic head, head gimbal assembly with thin-film magnetic head, magnetic disk drive apparatus with head gimbal assembly, method for designing thin-film magnetic head and manufacturing method of thin-film magnetic head

A bottom pole layer and a top pole layer respectively incorporate pole portion layers. Cross sections of the pole portion layers and a gap layer parallel to the top surface of a substrate are of the same shapes. The aggregate of the pole portion layers and the gap layer includes a first portion having a width W that defines the track width, and a second portion having a width greater than the width W of the first portion. L/W falls within a range of 2 to 5 inclusive, where L is the distance from a medium facing surface to the interface between the first portion and the second portion. S/(W&#xd7;L) falls within a range of 5 to 40 inclusive, where S is the area of the cross section of the aggregate parallel to the top surface of the substrate.

Thin-film magnetic head with gap and pole portion layers having cross sections of the same shapes and predetermined parameter ranges

A thin film magnetic head is provided to reduce excess magnetostatic leakage field in order to generate a sufficient recording magnetic field. The pole end portion has a width to define a recording track width. The pole rear portion has one end which is magnetically connected with the pole end portion at or in the vicinity of an edge portion of an insulating film and defines a first flare point, the other end which is connected with the upper yoke portion and defines a second flare point, and both side edges in the track width direction which are inclined so that the width in the track width direction gradually increases from the second flare point toward the first flare point. The width of the pole end portion at the first flare point is smaller than the maximum width of the pole rear portion.

Thin film magnetic head having an upper pole portion with a width that increases towards an abs

A writing magnetic pole portion composed of a first magnetic film and a second magnetic film formed on the first magnetic film via a gap film is fabricated on a given wafer. Then, the writing magnetic pole portion is swung forward and backward around a rotation standard axis parallel to a center line of the writing magnetic pole portion in a direction parallel to a surface of the. Then, the writing magnetic pole portion is milled during the swing of the writing magnetic pole portion to define the width of the writing magnetic pole portion.

Method for fabricating a thin film magnetic head

A thin film magnetic head includes a slider, at least one inductive type electromagnetic conversion element and a thermal diffusion film. The inductive type electromagnetic conversion element includes a first magnetic film, a second magnetic film, a gap film, a coil film and an insulating film which are supported by the slider. The coil film is embedded in the insulating film. The thermal diffusion film is made of a metallic film, and disposed in the heat transmission path from the coil film toward the slider.

Thin film magnetic head, magnetic head and magnetic disk driving device

Method of manufacturing a thin film magnetic head which can exhibit a high-performance head characteristic without complicating the manufacturing procedure. A coil connection is integrated into one body and constituted part of the thin film coil. A connection middle pattern is provided on the coil connection at the time of forming a pole tip so that the position of the upper surface of the connection middle pattern becomes higher than that of the top pole tip. After the whole portion is covered by an insulating film, the connection middle pattern also can be exposed by polishing the surface of the insulating film until the top pole tip is exposed. Therefore, unlike the case where no connection middle pattern is provided, it is not necessary to form an opening by partially removing part of the insulating film. As a result, the number of manufacturing steps can be reduced.

Method of manufacturing the thin film magnetic head

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Tokyo, Japan

Taro Oike