Sae Magnetics (h.k.) Limited

Headway Technologies, Incorporated

Tdk Corporation

Headway Technology, Inc.

Tatsuya Shimizu

Yoshitaka Sasaki

Shigeki Tanemura

Hiroyuki Ito

Kazuki Sato

Hironori Araki

Hiroyuki Itoh

Tatsushi Shimizu

Yukinori Ikegawa

Seiichiro Tomita

Koji Shimazawa

Atsushi Iijima

Ryuji Fujii

Jian Hui Huang

Takehiro Horinaka

Yasutoshi Fujita

Kazumasa Yasuda

Dong-Hong Li

Anthony Reymund Melad Binarao

Shao Hui Yang

A magnetic head includes a main pole, an expansion member, and a heater. The main pole has an end face located in a medium facing surface. The expansion member is located farther from the medium facing surface than is the main pole and adjacent to the main pole in a direction perpendicular to the medium facing surface. The heater heats the expansion member. The expansion member has a linear expansion coefficient higher than that of the main pole.

Magnetic head for perpendicular magnetic recording including a heater

A magnetic head includes a medium facing surface, a read head unit, a write head unit, and a protrusion device. The protrusion device causes part of the medium facing surface to protrude toward a recording medium. The read head unit has a first end face located in the medium facing surface and includes a first contact sensor for detecting contact of the first end face with the recording medium. The write head unit has a second end face located in the medium facing surface and includes a second contact sensor for detecting contact of the second end face with the recording medium. The first end face and the second end face are located at positions different from each other in a direction of travel of the recording medium.

Magnetic head including two contact sensors

A magnetic head includes a main pole, a write shield, and first and second nonmagnetic layers. The main pole has a top surface including an inclined surface portion. The write shield includes an inclined portion facing toward the top surface of the main pole. The first nonmagnetic layer is interposed between the inclined surface portion and the inclined portion. The second nonmagnetic layer is interposed between the first nonmagnetic layer and the inclined portion. The first nonmagnetic layer has a first front end located in a medium facing surface. The second nonmagnetic layer has a second front end that is located closest to but at a distance from the medium facing surface.

Magnetic head for perpendicular magnetic recording including a main pole and a write shield to provide improved write characteristics without compromising the function of the write shield

A magnetic head includes a coil, a main pole, a write shield, a first insulating film, and a second insulating film. The coil includes a specific coil element. The main pole has a top surface including an inclined surface portion and a flat surface portion. The write shield includes an inclined portion. The inclined portion includes a first portion opposed to the inclined surface portion, and a second portion located farther from a medium facing surface than the first portion. The specific coil element includes an interposition part interposed between the flat surface portion and the second portion. The first insulating film is interposed between the inclined surface portion and the first portion of the inclined portion, and between the interposition part and the second portion of the inclined portion. The second insulating film is interposed between the first insulating film and the second portion of the inclined portion.

Magnetic head including a first and second insulating film between a coil element and a write shield

A magnetic head includes a main pole, a write shield, and first and second nonmagnetic layers. The main pole has a top surface including an inclined surface portion. The inclined surface portion includes a first portion and a second portion, the first portion being closer to a medium facing surface. The write shield includes an inclined portion facing toward the top surface of the main pole. The first nonmagnetic layer is interposed between the inclined portion and the second portion of the inclined surface portion. The second nonmagnetic layer is interposed between the inclined portion and a combination of the first portion of the inclined surface portion and the first nonmagnetic layer.

Magnetic head for perpendicular magnetic recording including a main pole and a shield

A method of manufacturing a thermally-assisted magnetic recording head includes the steps of: forming a preliminary head section that has a surface to be polished and includes a magnetic pole, a waveguide, and a preliminary plasmon generator; causing a volumetric expansion of the preliminary plasmon generator with heat by introducing light into the core of the waveguide of the preliminary head section; and polishing the surface to be polished of the preliminary head section into a medium facing surface. The preliminary plasmon generator has an end face located in the surface to be polished. In the step of polishing the surface to be polished, the surface to be polished is subjected to polishing with the preliminary plasmon generator expanded in volume, whereby the end face of the preliminary plasmon generator is polished into the front end face, and the preliminary plasmon generator thereby becomes the plasmon generator.

Method of manufacturing a thermally-assisted magnetic recording head that suppresses protrusion of a plasmon generator

A thin-film magnetic head is constructed such that a main magnetic pole layer, a write shield layer, a gap layer, and a thin-film coil are laminated on a substrate. The thin-film magnetic head has a leading shield part opposing the main magnetic pole layer on the substrate side of the main magnetic pole layer, a substrate side shield part comes in contact with the leading shield part. The thin-film coil has a substrate side coil layer disposed between the main magnetic pole layer and the substrate. In the thin-film magnetic head, the spaces to the substrate about a leading lower end face of the leading shield part, a shield upper end face of the substrate side shield part, and coil upper end face of the substrate side coil layer are formed to be equal to each other. Further, a depth of the leading shield part is formed to be small than the depth of the substrate side shield part.

Thin-film magnetic head, method of manufacturing the same, head gimbal assembly, and hard disk drive

A magnetic head includes a magnetic structure incorporating a write shield. The magnetic structure is formed to include a first magnetic layer, a second magnetic layer stacked on the first magnetic layer, and a seed layer. The first magnetic layer has a front end face located in the medium facing surface and a top surface. The second magnetic layer has a front end face located in the medium facing surface and a bottom surface. The top surface of the first magnetic layer includes a first region including an end located in the medium facing surface and a second region farther from the medium facing surface than the first region. The seed layer is not present on the first region of the top surface of the first magnetic layer but is present on the second region.

Magnetic head for perpendicular magnetic recording having a main pole and a shield

A magnetic head includes a main pole, a return path section, a heater for heating the main pole, and a metal portion. The metal portion is isolated from the return path section and disposed such that the heater is interposed between the main pole and the metal portion. The return path section has a contact surface in contact with the main pole. The metal portion is located farther from the medium facing surface than is the contact surface. The main pole and the metal portion define therebetween a receiving space for receiving at least part of the heater. The at least part of the heater is received in the receiving space.

A magnetic head includes a main pole and a heater for heating the main pole. The main pole is shaped to have a receiving space formed therein for receiving at least part of the heater. The at least part of the heater is received in the receiving space. The main pole includes a first layer and a second layer stacked. The receiving space is sandwiched between the first layer and the second layer.

A magnetic head includes first and second coils, a main pole, a write shield, a return path section, and a yoke. The return path section is located on the front side in the direction of travel of a recording medium relative to the main pole. The yoke is located on the rear side in the direction of travel of the recording medium relative to the main pole. The first coil is wound around the main pole. The second coil is located on the rear side in the direction of travel of the recording medium relative to the main pole so as to pass between the main pole and the yoke.

Magnetic head for perpendicular magnetic recording having two coils

A magnetic head includes a coil, a main pole, and a return path section. The return path section includes a coil surrounding portion located on the front side in the direction of travel of a recording medium relative to the main pole and provided for forming a coil receiving space, and a connecting portion connecting the main pole and the coil surrounding portion to each other. The connecting portion has a contact surface in contact with the main pole. The coil receiving space is a space defined by a first virtual plane intersecting the contact surface and parallel to a medium facing surface, a second virtual plane including the contact surface and perpendicular to the direction of travel of the recording medium, and the coil surrounding portion. The coil includes a portion received in the coil receiving space.

Magnetic head for perpendicular magnetic recording having a return path section

A magnetic head includes a coil, a main pole, a write shield, and a return path section. The return path section includes a yoke layer located on the front side in the direction of travel of a recording medium relative to the main pole, and a coupling part coupling the main pole and the yoke layer to each other. The coupling part includes a plurality of magnetic path portions that separate a magnetic flux into a plurality of fluxes and allow the fluxes to pass therethrough in parallel. The coil includes a plurality of winding portions disposed around the plurality of magnetic path portions, respectively.

Magnetic head for perpendicular recording having a plurality of magnetic path portions

A magnetic head includes first and second coils, a main pole, a write shield, a return path section, and a core part. The return path section includes a yoke part magnetically connected to the write shield, and a coupling part located away from a medium facing surface and magnetically coupling the yoke part and the main pole to each other. The first coil is located on the front side in the direction of travel of a recording medium relative to the main pole and wound around the coupling part. The core part is located farther from the medium facing surface than is the coupling part, and is magnetically connected to the main pole. The second coil is located on the front side in the direction of travel of the recording medium relative to the main pole and wound around the core part.

A main pole has an end face located in a medium facing surface, and first through sixth side surfaces. The first and third side surfaces are connected to the end face of the main pole. The second and fourth side surfaces are located farther from the medium facing surface than are the first and third side surfaces. The fifth side surface connects the first side surface to the second side surface. The sixth side surface connects the third side surface to the fourth side surface. The distance between the first side surface and the third side surface decreases with increasing proximity to the top surface of the substrate. The shape of the first side surface is defined by a first side shield. The shape of the third side surface is defined by a second side shield.

Growing community of inventors

Hong Kong, China

Tatsuya Shimizu