Abstract: A mounting structure includes: a first substrate that has a first surface on which a functional element is provided; a wiring portion that is provided at a position, which is different from a position of the functional element on the first surface, and is conductively connected to the functional element; a second substrate that has a second surface that is opposite to the first surface; and a conduction portion that is provided on the second surface, is connected to the wiring portion, and is conductively connected the functional element. The shortest distance between the functional element and the second substrate is longer than the longest distance between the second substrate and a position where the wiring portion is connected to the conduction portion.

Abstract: A mounting structure includes: a first substrate that has a first surface on which a functional element is provided; a wiring portion that is provided at a position, which is different from a position of the functional element on the first surface, and is conductively connected to the functional element; a second substrate that has a second surface that is opposite to the first surface; and a conduction portion that is provided on the second surface, is connected to the wiring portion, and is conductively connected the functional element. The shortest distance between the functional element and the second substrate is longer than the longest distance between the second substrate and a position where the wiring portion is connected to the conduction portion.

Abstract: According to one embodiment, a magnetic disk device includes a disk, a head, and a controller configured to control the head based on a plurality of upper parameter groups each corresponding to a plurality of upper areas among a plurality of parameter groups each corresponding to a plurality of recording areas into which the disk is divided in a radial direction, the upper areas each corresponding to the recording areas, and a plurality of lower parameter groups each corresponding to a plurality of lower areas into which the upper areas are each divided in the radial direction, the lower parameter groups being different from the upper parameter groups among the parameter groups.

Abstract: According to one embodiment, a magnetic disk device includes a disk, a head, and a controller configured to control the head based on a plurality of upper parameter groups each corresponding to a plurality of upper areas among a plurality of parameter groups each corresponding to a plurality of recording areas into which the disk is divided in a radial direction, the upper areas each corresponding to the recording areas, and a plurality of lower parameter groups each corresponding to a plurality of lower areas into which the upper areas are each divided in the radial direction, the lower parameter groups being different from the upper parameter groups among the parameter groups.

Abstract: An object of the present invention is to provide a processing apparatus with which an operation for retaining and switching a processing subject can be shortened in order to reduce an amount of time required for folding processing. A processing apparatus (1C) for unfurling or folding a processing subject (T) includes a first retaining device (300A) and a second retaining device (300B) that are capable of moving within a first area and retaining the processing subject (T), a carrying device (400) disposed within the first area so as to be capable of carrying the processing subject (T), and a third retaining device (300C) that is capable of moving within a second area disposed below the first area so as to overlap the first area, and retaining the processing subject (T) below the carrying device (400).

Abstract: According to one embodiment, a disk storage apparatus includes a write controller and a refresh controller. The write controller is configured to perform shingled write, writing data on a disk, using, as write units, data areas including groups of tracks. The refresh controller is configured to count the number of times the shingled write has been performed in a data area adjacent to the inner or outer circumference of a data area, in accordance with a weighting value set on the basis of a shingled write direction, and to instructs that a refresh process be performed, when the number of times counted exceeds a threshold value.

Abstract: According to one embodiment, a magnetic disk apparatus includes a magnetic disk, a slider including a head element, a heater which heats the slider and vary a protrusion amount of the head element toward the magnetic disk, a controller which performs DFH control to vary a control amount for power applied to the heater at a fixed period of time, a sensor which outputs a signal corresponding to the protrusion amount of the head element, and a determination unit which determines a touchdown of contact between the magnetic disk and part of the slider, based on a peak value of a DC output signal of the sensor.

Abstract: According to one embodiment, there is provided a method for detecting touchdown of head in a disk storage apparatus. The disk storage apparatus includes the head. The head includes a write element, a read element, a head disk interference (HDI) sensor, and a heater element. The HDI sensor detects thermal interference between the head and the disk. The method supplies alternating-current heater power to the heater element. The method increases the heater power in a step-by-step manner. The method further detects a phase of an output signal from the HDI sensor corresponding to the increased heater power, and detects the touchdown based on a change in the detected phase.

Abstract: According to one embodiment, a disk storage apparatus includes a write controller and a refresh controller. The write controller is configured to perform shingled write, writing data on a disk, using, as write units, data areas including groups of tracks. The refresh controller is configured to count the number of times the shingled write has been performed in a data area adjacent to the inner or outer circumference of a data area, in accordance with a weighting value set on the basis of a shingled write direction, and to instructs that a refresh process be performed, when the number of times counted exceeds a threshold value.

Abstract: According to one embodiment, an apparatus for controlling a head includes a transmitting module and a controller. The transmitting module is configured to transmit a write signal to a magnetic head having a spin torque oscillator at the time of recording data. The controller is configured to supply a drive signal that has a level higher than the ordinary level for a prescribed effective time, to the spin-torque oscillator in response to an input write gate that instructs the recording of data. During a period other than prescribed effective time, the controller supplies a drive signal having the ordinary level to the spin-torque oscillator.

Abstract: A tunnel magnetoresistance effect magnetic head having between magnetic shield layers, an antiferromagnetic layer, a pinned layer which has the direction of magnetization pinned by exchange coupling with the antiferromagnetic layer, an insulating layer, and a free layer whose direction of magnetization rotates relatively to external magnetic fields, wherein the antiferromagnetic layer is of an antiferromagnetic substance composed mainly of IrMn, the pinned layer is made up of a first pinned layer of CoFe alloy in contact with the antiferromagnetic layer and a second pinned layer of CoFeB alloy which is antiferromagnetically coupled with the first pinned layer, and the first and second pinned layers have the amount of magnetization such that the difference M1?M2 is in the range of 0<M2?M1<0.5 (nm·T) and also have the magnetostriction constants such that the difference |?1??2| is no larger than 5.0×10?6.

Abstract: According to one embodiment, an apparatus for controlling a head includes a transmitting module and a controller. The transmitting module is configured to transmit a write signal to a magnetic head having a spin torque oscillator at the time of recording data. The controller is configured to supply a drive signal that has a level higher than the ordinary level for a prescribed effective time, to the spin-torque oscillator in response to an input write gate that instructs the recording of data. During a period other than prescribed effective time, the controller supplies a drive signal having the ordinary level to the spin-torque oscillator.

Abstract: In one embodiment, a seed layer, an underlayer, and a magnetic domain control layer are laminated on both sides of a magnetoresistive sheet unit. A lower electrode film is thinly formed on an upper portion of the magnetic domain control film. A portion of the lower electrode film near the magnetoresistive sheet unit does not protrude substantially from an upper surface of the magnetoresistive sheet unit. Should the portion protrude, a step from the upper surface of the magnetoresistive sheet unit is about 14 nm or less. This portion and the upper surface of the magnetoresistive sheet unit are formed into a flat surface. An upper electrode film is formed thickly on an upper portion of the lower electrode film on an outside thereof so as to circumvent the flat surface. A protective layer, an upper gap film, and an upper magnetic shield film are also formed.

Abstract: A method of calculating an ion concentration distribution is provided. The method includes: setting meshes at regular intervals d along a beam axis of a beam implanted at a tilt angle ?; making mesh intervals on a surface d/sin?; generating meshes parallel and perpendicular to the beam axis in a simulator; and calculating an ion concentration distribution by using the meshes.

Abstract: Embodiments of the invention provide a reading head structure that ensures a stable magnetic moment of a pinned layer against a great external magnetic field, and minimizes the pinned-layer damage occurring during air-bearing surface machining. In one embodiment, a magnetoresistive head is based on a spin-valve effect and has free layers, a stacked-type pinned layer, and an electroconductive nonmagnetic spacer layer positioned between the free layers and the stacked-type pinned layer. The stacked-type pinned layer includes three ferromagnetic films, and antiferromagnetic coupling films interposed between the ferromagnetic films. Of these ferromagnetic films, the first two films have a high coercivity and a high resistivity. The third ferromagnetic film is made of a material that gives a great magnetoresistive effect. The sum of the magnetic moments generated from the stacked-type pinned layer is substantially zero.

Abstract: Even if the track and gap widths are made narrow in a read head, a narrow track head has so far been unable to afford satisfactory off-track characteristics because of a wide shield spacing over electrodes. The invention provides a magnetic head wherein, in the height direction of a magnetoresistive element, the spacing between an upper magnetic shield and a lower magnetic shield at an air bearing surface is narrower than the spacing between the upper and lower magnetic shields formed over a thickest portion of each of electrodes in contact with associated magnetic domain control layers.

Abstract: Making thinner the magnetic domain control layer deteriorates the magnetic properties. Also, disturbances tend to increase the magnetization dispersion of the magnetic domain control layer, thereby lowering the magnetic domain control bias magnetic field. In one embodiment of the invention, a first magnetic domain control layer is provided in the proximity of the free layer of the GMR sensor in such a way that the track width is Twr1. Outside the first magnetic domain control layer is provided a second magnetic domain control layer. The second magnetic domain control layer placed outside the first magnetic domain control layer gives the first magnetic domain control layer an external bias field. The amount of magnetization of the tip of the first magnetic domain control layer is polarized and increased by the bias magnetic field from the second magnetic domain control layer.

Abstract: A motor drive unit comprises a DC power source, a plurality of inverter circuits for converting the a power of this DC power source to an AC power, current detectors for detecting an output current of at least one of those plurality of inverter circuits and a controller for performing PWM control of those plurality of inverter circuits. This controller is constructed in a way to synchronize a PWM period of the plurality of inverter circuits, so as to drive a plurality of motors at once by means of those plurality of inverter circuits respectively.

Abstract: According to one embodiment, in a disk drive having a disk and a flash memory, the disk controller controls the timing of performing a block erase when the flash memory is accessed, so that this timing may differ from the timing of a seek operation that is performed when the disk is accessed. This prevents the current flowing in the disk drive from exceeding the maximum operating current.

Abstract: Embodiments of the present invention help to suppress etching damage to a non-magnetic intermediate layer in manufacturing steps of a reproducing head. In one embodiment, a reproducing head has two junction insulating films between side ends of magnetoresistive sensor and hard bias films at both left and right of a track width direction of the magnetoresistive sensor. The reproducing head has first junction insulating films in addition to second junction insulating films.