Patent application number | Description | Published |
20130283601 | METHOD OF MANUFACTURING MAGNETIC HEAD FOR PERPENDICULAR MAGNETIC RECORDING HAVING A RETURN PATH SECTION - A method of manufacturing a magnetic head includes the step of forming an accommodation part and the step of forming a return path section. The return path section lies between a main pole and a top surface of a substrate, and connects a shield and part of the main pole away from a medium facing surface to each other so that a space through which part of a coil passes is defined. The accommodation part accommodates at least part of the return path section. The step of forming the return path section forms first to third portions simultaneously. The first portion is located closer to the top surface of the substrate than is the space. The second portion is located closer to the medium facing surface than is the space. The third portion is located farther from the medium facing surface than is the space. | 10-31-2013 |
20130329319 | MAGNETIC HEAD FOR PERPENDICULAR MAGNETIC RECORDING HAVING A RETURN PATH SECTION - 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. | 12-12-2013 |
20140247706 | PLASMON GENERATOR INCLUDING TWO PORTIONS MADE OF DIFFERENT METALS - A plasmon generator has a front end face located in a medium facing surface of a magnetic head. The plasmon generator includes a first portion formed of a first metal material and a second portion formed of a second metal material. The first portion has an inclined surface facing toward the front end face. The second portion is located between the inclined surface and the front end face, and includes a first end face located in the front end face and a second end face in contact with the inclined surface. The second metal material is higher in Vickers hardness than the first metal material. The first portion has a plasmon exciting part. The front end face generates near-field light. | 09-04-2014 |
20140269232 | NEAR-FIELD LIGHT GENERATOR AND THERMALLY-ASSISTED MAGNETIC RECORDING HEAD - A near-field light generator includes a multilayer structure having a front end face. The multilayer structure includes a first dielectric layer, a second dielectric layer, a third dielectric layer, a first metal layer, and a second metal layer. The first metal layer is interposed between the first dielectric layer and the second dielectric layer. The second metal layer is interposed between the second dielectric layer and the third dielectric layer. Each of the first to third dielectric layers and the first and second metal layers has an end located in the front end face. The dielectric material used to form the first dielectric layer, the dielectric material used to form the second dielectric layer, and the dielectric material used to form the third dielectric layer have the same permittivity. | 09-18-2014 |
20140269237 | MULTILAYER PLASMON GENERATOR - A plasmon generator has a front end face, a first metal layer, a second metal layer, and an intermediate layer. The front end face generates near-field light based on a surface plasmon. The intermediate layer is interposed between the first metal layer and the second metal layer. Each of the first metal layer, the second metal layer and the intermediate layer has an end located in the front end face. Each of the first and second metal layers is formed of a metal material. The intermediate layer is formed of a material higher in Vickers hardness than the metal material used to form the first metal layer and the metal material used to form the second metal layer. | 09-18-2014 |
20140291284 | METHOD OF MANUFACTURING A NEAR-FIELD LIGHT GENERATOR INCLUDING A WAVEGUIDE AND A PLASMON GENERATOR - In a method of manufacturing a near-field light generator, a structure including a core and a polishing stopper layer disposed on the top surface of the core is formed on a first cladding layer. Next, a cladding material layer is formed to cover the first cladding layer and the structure. The cladding material layer is then polished until the polishing stopper layer is exposed. Next, the polishing stopper layer is removed so that the cladding material layer has a protruding portion protruding upward to a higher level than the top surface of the core. The cladding material layer is then polished so as to remove the protruding portion and thereby make the cladding material layer into a second cladding layer. Then, a third cladding layer and a plasmon generator are formed. | 10-02-2014 |
20140298644 | METHOD OF MANUFACTURING PLASMON GENERATOR - A method of manufacturing a plasmon generator includes the steps of: an initial film made of a metal polycrystal and including a pre-plasmon-generator portion that later becomes the plasmon generator; heating the initial film with heating light so that a plurality of crystal grains constituting the metal polycrystal grow at least in the pre-plasmon-generator portion; stopping the heating of the initial film; and forming the plasmon generator by processing the initial film after the step of stopping the heating. The step of forming the plasmon generator includes the step of providing the pre-plasmon-generator portion with a front end face that generates near-field light. | 10-09-2014 |
20150098154 | THIN-FILM MAGNETIC HEAD, METHOD OF MANUFACTURING THE SAME, HEAD GIMBAL ASSEMBLY, AND HARD DISK DRIVE - 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 has contact with the leading shield part. The thin-film coil has a substrate side coil layer between the main magnetic pole layer and substrate. 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. The depth of the leading shield part is formed to be smaller than the depth of the substrate side shield part. | 04-09-2015 |