摘要:
A magnetic head includes: an encasing layer made of a nonmagnetic material and having a groove that opens in the top surface; a nonmagnetic metal layer made of a nonmagnetic metal material, disposed on the top surface of the encasing layer, and having a penetrating opening that is contiguous to the groove; and a pole layer made of a magnetic metal material and encased in the groove of the encasing layer and in the opening of the nonmagnetic metal layer. The pole layer has an end face located in a medium facing surface, the end face having a first portion and a second portion that is located farther from a substrate than the first portion and connected to the first portion. The first portion has a width that decreases as the distance from the substrate decreases. The second portion has a uniform width that defines the track width. In the medium facing surface, the nonmagnetic metal layer exists on both sides of the second portion, the sides being opposed to each other in the direction of track width.
摘要:
An occupant detection system includes occupant sensors on each of plural seats, first resistors in connection to each of the occupant sensors with different resistance values, a power supply line that supplies electric power to the sensors and resistors from a power source by connecting those parts and the power source, and a control unit that detects occupancy of each of the plural seats based on an electric current value of the power supply line. The occupant detection system having the above configuration detects the occupancy of each of the plural seats without increasing the number of input terminals on the control unit.
摘要:
The system includes a magnetic head which faces a recording medium. The magnetic head has a coil which generates magnetic fields. The magnetic head also has a pole layer which is formed using a pattern. The pole layer allows magnetic flux generated by the coil to write data onto the recording medium. The pole layer generates a write magnetic field for writing data onto the recording medium.A photomask is used to form the magnetic head. The photomask includes three regions. The first region has such a perimeter that a projection image thereof is shaped along a perimeter of an ideal shape of the top surface of the pole layer, and the second region touches the first region's perimeter. The third region suppresses deviation of the pole layer from its desired shape which may be caused by the effect of light reflected while the photoresist layer is exposed.
摘要:
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 Al2O3. 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 BCl3 and N2 among BCl3, Cl2 and N2.
摘要:
A pole layer has an end face located in a medium facing surface, allows a magnetic flux corresponding to a magnetic field generated by a coil to pass therethrough, and generates a write magnetic field for writing data on a recording medium by using a perpendicular magnetic recording system. A shield incorporates: a first layer having an end face located in a region of the medium facing surface forward of the end face of the pole layer along the direction of travel of the recording medium; a second layer disposed in a region sandwiching the pole layer with the first layer; a first coupling portion coupling the first layer to the second layer without touching the pole layer; and a second coupling portion coupling the pole layer to the second layer and located farther from the medium facing surface than the first coupling portion.
摘要:
The invention is directed to a method for manufacturing a thin film magnetic head comprising forming a first coil, a first pole piece and a first back gap piece on a first insulating film formed on a surface of a first magnetic film, so that the first coil, the first pole piece and the first back gap piece have a taper angle making a sectional shape wider in a lower part and narrower in an upper part; forming a second insulating film on surfaces of the first coil, the first pole piece and the first back gap piece; forming a first seed film on the second insulating film; growing a first plating film for a second coil on the first seed film in an area where the second coil is to be formed, so that the first plating film fills up spaces between the first pole piece and an outermost coil turn of the first coil, between coil turns of the first coil, and between an innermost coil turn of the first coil and the first back gap piece; and flattening the first plating film by polishing, so that to obtain a pattern of the second coil.
摘要:
A magnetic head includes an encasing layer made of a nonmagnetic material and having a groove that opens in the top surface; a nonmagnetic metal layer made of a nonmagnetic metal material, disposed on the top surface of the encasing layer, and having a penetrating opening that is contiguous to the groove; and a pole layer made of a magnetic metal material and encased in the groove of the encasing layer and in the opening of the nonmagnetic metal layer. The pole layer has an end face located in a medium facing surface, the end face having a first portion and a second portion that is located farther from a substrate than the first portion and connected to the first portion. The first portion has a width that decreases as the distance from the substrate decreases. The second portion has a uniform width that defines the track width. In the medium facing surface, the nonmagnetic metal layer exists on both sides of the second portion, the sides being opposed to each other in the direction of track width.
摘要:
A thin film magnetic head has a configuration in which a main magnetic pole film having a magnetic pole end portion on a medium opposing surface (ABS) side facing a magnetic disk, a write shield film facing the magnetic pole end portion so as to form a recording gap film on the medium opposing surface side, and a thin film coil wound around at least a part of the write shield film are laminated. Further, the thin film magnetic head has an upper yoke magnetic pole film whose size is larger than that of the main magnetic pole film at a part more distant from the ABS than the recording gap film, and this upper yoke magnetic pole film is bonded to the side of the main magnetic pole film close to the thin film coil. In the upper yoke magnetic pole film, an end portion on the ABS side is retracted in a direction apart from the ABS in accordance with an increase in film thickness which is measured from the surface of the main magnetic pole film.
摘要:
A pole layer has an end located in a medium facing surface, the end having: a first side close to a substrate; a second side located opposite to the first side; a third side connecting an end of the first side to an end of the second side; and a fourth side connecting the other end of the first side to the other end of the second side. The second side defines a track width. The end of the pole layer located in the medium facing surface has a width that decreases toward the first side. The pole layer is disposed in a groove of a pole-layer-encasing layer made of a nonmagnetic insulating material, with a nonmagnetic conductive film provided between the encasing layer and the pole layer. The pole layer incorporates: a first layer located closer to the surface of the groove; and a second layer located farther from the surface of the groove.
摘要:
A load sensor is provided as a seat sensor that includes a first film formed in a linear shape, a second film formed in the same shape as the first film and arranged facing the first film, sensor electrodes arranged between the first film and the second film facing each other. The electrodes are normally spaced apart from each other and come in contact with each other upon receiving a load. The electrodes are connected to a connector through a conducting portion arranged between the first film and the second film. The seat sensor is disposed on a seat where a large compressive force is applied by a passenger.