Abstract: A double pipe includes an outer pipe in which an inner pipe is placed, and a spacer that maintains a clearance between the inner pipe and the outer pipe. At least a part of the spacer is press-fitted by an inner circumferential surface of the outer pipe and an outer circumferential surface of the inner pipe. More specifically, the outer pipe includes a diameter-reduced portion having undergone diameter reduction by plasticity processing. An inner circumferential surface of the diameter-reduced portion is present across the entire circumference other than the opening of the spacer, and presses an outer circumferential surface of the spacer inwardly in the radial direction.

Abstract: A double pipe includes an outer pipe in which an inner pipe is placed, and a spacer that maintains a clearance between the inner pipe and the outer pipe. At least a part of the spacer is press-fitted by an inner circumferential surface of the outer pipe and an outer circumferential surface of the inner pipe. More specifically, the outer pipe includes a diameter-reduced portion having undergone diameter reduction by plasticity processing. An inner circumferential surface of the diameter-reduced portion is present across the entire circumference other than the opening of the spacer, and presses an outer circumferential surface of the spacer inwardly in the radial direction.

Abstract: At least two spacers in an elongated shape is provided between an internal pipe and an external pipe along the center line of a double pipe. In the cross section of a bent portion as viewed in a direction along the center line of the double pipe, the first spacer is located inwardly relative to the center of the double pipe with reference to the radial direction of the bent portion. The second spacer is located outwardly relative to the center of the double pipe. When a straight line that passes through the center of the radius of the bent portion and through the center of the double pipe is taken as a reference line at least either one of the first spacer or the second spacer overlaps the reference line.

Abstract: A magnetic read element having an additional magnetic layer, “a floating magnetic shield”, formed as a part of a capping structure of a magnetoresistive element. The capping structure is formed over the magnetic free layer and includes a magnetic layer that is located between first and second non-magnetic layers. The magnetic layer can advantageously be formed with a high magnetic permeability for increased signal amplitude and increased signal resolution. In addition, because the magnetic layer of the capping layer structure acts as a magnetic shield, it can reduce effective magnetic gap spacing for increased signal resolution.

Abstract: A magnetic read element having an additional magnetic layer, “a floating magnetic shield”, formed as a part of a capping structure of a magnetoresistive element. The capping structure is formed over the magnetic free layer and includes a magnetic layer that is located between first and second non-magnetic layers. The magnetic layer can advantageously he formed with a high magnetic permeability for increased signal amplitude and increased signal resolution. In addition, because the magnetic layer of the capping layer structure acts as a magnetic shield, it can reduce effective magnetic gap spacing for increased signal resolution.

Abstract: According to one embodiment, a magnetic head includes a lower magnetic shield positioned at a media facing surface of the head, a lower sensor positioned above the lower magnetic shield, the lower sensor including a lower free layer, a middle magnetic shield positioned above the lower sensor at the media facing surface of the head, and a back side antiferromagnetic (AFM) layer positioned behind the lower free layer in an element height direction, the back side AFM layer being configured to provide magnetic stabilization for the middle magnetic shield. In another embodiment, a method includes forming a lower sensor including a lower free layer, forming a back side AFM layer behind the lower free layer in an element height direction, and forming a middle magnetic shield above the lower sensor, wherein the back side AFM layer is configured to provide magnetic stabilization for the middle magnetic shield.

Abstract: A magnetic read sensor having an extended pinned layer and having a free layer structure with a back edge formed at an angle for optimizing sensor performance and pinned layer pinning. The magnetic free layer has a back edge that is formed at an angle of between 6 and 10 degrees relative to a plane parallel with the air bearing surface plane. The magnetic sensor can be formed by forming the free layer stripe height with an ion milling that is performed at an angle of 6 to 10 degrees relative to normal.

Abstract: A two-dimensional magnetic recording (TDMR) multi-sensor read head has three stacked sensors separated by magnetic shields. The lower sensor is the primary sensor that is always aligned with the target track. The middle sensor is spaced laterally from the lower sensor a distance substantially equal to the track pitch (TP). The upper sensor is aligned with the lower sensor. The spacing D between the lower and upper sensors is selected to be related to TP and a maximum skew angle, where the skew angle is the angle between a line orthogonal to the sensor and the data track that varies with radial position of the head. The read head is connected to circuitry that selects two of the three sensors to be the active sensors depending on the radial position of the head and thus the skew angle of the head.

Abstract: A magnetic read sensor having an extended pinned layer and having a free layer structure with a back edge formed at an angle for optimizing sensor performance and pinned layer pinning. The magnetic free layer has a back edge that is formed at an angle of between 6 and 10 degrees relative to a plane parallel with the air bearing surface plane. The magnetic sensor can be formed by forming the free layer stripe height with an ion milling that is performed at an angle of 6 to 10 degrees relative to normal.

Abstract: In one embodiment, a magnetic disk device includes a magnetic disk medium, at least one magnetic head having at least one of: a magnetic read element configured to read data from the magnetic disk medium and a magnetic write element configured to write data to the magnetic disk medium, and a heating element configured to generate heat upon application of a voltage/current thereto, wherein the heating element is positioned on, near, or within the magnetic head, a drive mechanism for passing the magnetic disk medium over the at least one magnetic head, and a controller electrically coupled to the at least one magnetic head for controlling operation of the at least one magnetic head, wherein the controller is configured to retract the at least one magnetic head from a flying state above the magnetic disk medium and apply the voltage/current to the heating element while the magnetic head is retracted.

Abstract: In one embodiment, a magnetic head includes a lower shield, a read element positioned above the lower shield at a media-facing surface of the magnetic head, the read element having a free layer, an upper shield positioned above the read element, a first domain control layer having a direction of magnetization in a predetermined direction, the first domain control layer being configured to control a direction of magnetization of the free layer toward the predetermined direction, and a second domain control layer configured to have a magnetization in a same direction as the direction of magnetization of the first domain control layer, the second domain control layer being positioned above the first domain control layer, wherein the first domain control layer is a hard magnetic layer, and wherein the second domain control layer is a soft magnetic layer.

Abstract: A heat exchanger including a tubular core case, a pair of end plates for closing opposite ends of the core case, and a plurality of heat exchange tubes supported at opposite ends thereof by the end plates and allowing flow of a first heating medium inside thereof. One end plate is disposed on an upstream side of the first heating medium as an upstream end plate while the other end plates is disposed on a downstream side of the first heating medium as a downstream end plate. The downstream end plate comprises a downstream bottom surface part for supporting downstream end parts of the heat exchange tubes, and a downstream wall part formed integrally with and rising from a peripheral edge of the downstream bottom surface part, and a top end part of the downstream wall part is oriented toward upstream of the flow of the first heating medium.

Abstract: A magnetic head according to one embodiment includes a read sensor adapted for sensing an external magnetic field; an upper magnetic shield positioned above the read sensor along an air bearing surface (ABS) of the read sensor; a lower magnetic shield positioned below the read sensor along the ABS of the read sensor; a rear insulating layer positioned on a rear side of the read sensor, the rear side being on an opposite side of the read sensor as the ABS of the read sensor; and a soft magnetic layer positioned near the rear side of the read sensor opposite the ABS of the read sensor, wherein the rear insulating layer is positioned between the soft magnetic layer and the read sensor, and wherein the rear insulating layer is positioned between the soft magnetic layer and the lower magnetic shield.

Abstract: In one embodiment, a magnetic disk device includes a magnetic disk medium, at least one magnetic head having at least one of: a magnetic read element adapted for reading data from the magnetic disk medium and a magnetic write element adapted for writing data to the magnetic disk medium, and a heating element adapted for generating heat upon application of a voltage/current thereto, wherein the heating element is positioned on, near, or within the magnetic head, a drive mechanism for passing the magnetic disk medium over the at least one magnetic head, and a controller electrically coupled to the at least one magnetic head for controlling operation of the at least one magnetic head, wherein the controller is configured to retract the at least one magnetic head from a flying state above the magnetic disk medium and apply the voltage/current to the heating element while the magnetic head is retracted.

Abstract: In one embodiment, a magnetic disk device includes a magnetic disk medium, at least one magnetic head having at least one of: a magnetic read element configured to read data from the magnetic disk medium and a magnetic write element configured to write data to the magnetic disk medium, and a heating element configured to generate heat upon application of a voltage/current thereto, wherein the heating element is positioned on, near, or within the magnetic head, a drive mechanism for passing the magnetic disk medium over the at least one magnetic head, and a controller electrically coupled to the at least one magnetic head for controlling operation of the at least one magnetic head, wherein the controller is configured to retract the at least one magnetic head from a flying state above the magnetic disk medium and apply the voltage/current to the heating element while the magnetic head is retracted.

Abstract: A magnetic head according to one embodiment includes a read sensor adapted for sensing an external magnetic field; an upper magnetic shield positioned above the read sensor along an air bearing surface (ABS) of the read sensor; a lower magnetic shield positioned below the read sensor along the ABS of the read sensor; a rear insulating layer positioned on a rear side of the read sensor, the rear side being on an opposite side of the read sensor as the ABS of the read sensor; and a soft magnetic layer positioned near the rear side of the read sensor opposite the ABS of the read sensor, wherein the rear insulating layer is positioned between the soft magnetic layer and the read sensor, and wherein the rear insulating layer is positioned between the soft magnetic layer and the lower magnetic shield.

Abstract: In one embodiment, a method includes forming a conducting material above an insulating film, applying a mask to portions of the conducting material in a shape of a TFC structure, removing exposed portions of the conducting material to form the TFC structure, depositing an insulating film above the TFC structure, and planarizing the insulating film to form a planar upper surface of the insulating film. In another embodiment, a magnetic head includes a TFC structure positioned between insulating films and a magnetic element positioned above the TFC structure, the TFC structure configured for providing localized thermal protrusion of the magnetic head on a media facing surface thereof, wherein an upper surface of an upper of the insulating films is planar, the magnetic element includes at least one of a main magnetic pole and a read sensor, and the TFC structure is configured for providing thermal protrusion of the magnetic element.

Abstract: A manner for stabilizing the shield domain structure is described that employs the magnetic field of a hard bias layer. More particularly, it has been found that the shield domain structure is stabilized when the height of the hard bias layer in the depth direction is made substantially half the height of upper shield layer. In another embodiment of the invention, a stabilizing structure is provided at approximately the midpoint of the shield in order to fix the closure domain of the shield to the desired two-domain structure. In an embodiment of the invention, the stabilizing structure is made convex or concave as viewed from the air-bearing surface.

Abstract: A manner for stabilizing the shield domain structure is described that employs the magnetic field of a hard bias layer. More particularly, it has been found that the shield domain structure is stabilized when the height of the hard bias layer in the depth direction is made substantially half the height of upper shield layer. In another embodiment of the invention, a stabilizing structure is provided at approximately the midpoint of the shield in order to fix the closure domain of the shield to the desired two-domain structure. In an embodiment of the invention, the stabilizing structure is made convex or concave as viewed from the air-bearing surface.

Abstract: In one embodiment, a magnetic disk device includes a magnetic disk medium, at least one magnetic head having at least one of: a magnetic read element adapted for reading data from the magnetic disk medium and a magnetic write element adapted for writing data to the magnetic disk medium, and a heating element adapted for generating heat upon application of a voltage/current thereto, wherein the heating element is positioned on, near, or within the magnetic head, a drive mechanism for passing the magnetic disk medium over the at least one magnetic head, and a controller electrically coupled to the at least one magnetic head for controlling operation of the at least one magnetic head, wherein the controller is configured to retract the at least one magnetic head from a flying state above the magnetic disk medium and apply the voltage/current to the heating element while the magnetic head is retracted.