A magnetic recording transducer is provided. The magnetic recording transducer comprises a main pole including a nose portion, the nose portion terminating at an air-bearing surface (ABS). The magnetic recording transducer further comprises at least one coil having a coil front distal from the ABS, and at least one side shield. The at least one side shield extends from at the ABS to not further than the coil front.

Magnetic recording transducer having side shields between the coils and the air-bearing surface

A magnetic recording transducer includes a main pole including a nose portion, the nose portion terminating at an air-bearing surface (ABS). The magnetic recording transducer further includes at least one coil having a coil front distal from the ABS, and at least one side shield, the at least one side shield extending from at the ABS to not further than the coil front.

Magnetic recording transducer having side shields

A read sensor for a read transducer is fabricated. The read transducer has field and device regions. A read sensor stack is deposited. A mask covering part of the stack corresponding to the read sensor is provided. The read sensor having inboard and outboard junction angles is defined from the stack in a track width direction. A critical junction (CJ) focused ion beam scan (FIBS) polishing that removes part of the read sensor based on the junction angles is performed. A hard bias structure is deposited and the transducer planarized. A remaining portion of the mask is removed. A stripe height mask covering part of the read sensor and hard bias structure in a stripe height direction is provided. The read sensor stripe height is defined. A tunneling magnetoresistance (TMR) FIBS polishing that removes part of the stack in the field region is performed. An insulating layer is provided.

Method and system for providing a read sensor in a magnetic recording transducer using focused ion beam scan polishing

A method for manufacturing a magnetic transducer is described. The method includes providing a negative mask having a bottom, a plurality of sides, and a top wider than the bottom. The method also includes depositing a nonmagnetic layer on the negative mask. The nonmagnetic layer has a plurality of portions covering the plurality of sides of the negative mask. The method also includes providing a first mask having a first trench therein. The negative mask resides in the first trench. The method further includes depositing side shield material(s), at least a portion of which resides in the first trench. The method further includes removing the negative mask to create a second trench between the plurality of portions of the nonmagnetic layer and form a pole, at least a portion of which resides in the second trench.

Method for manufacturing a magnetic recording transducer having side shields

A magnetic memory device is provided. The magnetic memory device includes a first vertical magnetic layer and a second vertical magnetic layer on a substrate, a tunnel barrier layer between the first vertical magnetic layer and the second vertical magnetic layer, and an exchange-coupling layer between a first sub-layer of the first vertical magnetic layer and a second sub-layer of the first vertical magnetic layer.

Magnetic memory device

A PMR writer is disclosed wherein a hot seed layer (HS) made of a 19-24 kilogauss (kG) magnetic material is formed between a side gap and a 10-16 kG magnetic layer in the side shields, and between a 16-19 kG magnetic layer and the leading gap in the leading shield to improve Hy_grad and Hy_grad_x while maintaining write-ability. The HS is from 10 to 100 nm thick and has a first side facing the write pole with a height of ≦0.15 micron, and a second side facing a main pole flared side that may extend to a full side shield height of ≦0.5 micron. First and second sides may form a continuous curve or the a double tapered design where first and second sides have different angles with respect to a center plane. The side shield design described herein is especially beneficial for side gaps of 20-60 nm.

High moment side shield design for area density improvement of perpendicular magnetic recording (PMR) writer

A main magnetic pole includes a first part extending from a medium facing surface to a point at a predetermined distance from the medium facing surface, and a second part other than the first part. An accommodation part for accommodating the main magnetic pole includes: a first layer having a groove; a second layer lying between the first layer and the main magnetic pole in the first layer's groove; and a third layer interposed in part between the second layer and the main magnetic pole in the first layer's groove. The second layer is formed of a metal material different from a material used to form the first layer. The third layer is formed of an inorganic insulating material. The second and third layers lie between the first layer and the first part. The second layer lies between the bottom of the first layer's groove and the second part, but the third layer does not. The distance between the bottom of the first layer's groove and the second part is smaller than that between the bottom and the first part.

Magnetic head for perpendicular magnetic recording and method of manufacturing same

A perpendicular magnetic write head is provided with a magnetic pole and a pair of side shields disposed on both sides of the magnetic pole in a cross track direction with side gaps in between. Each of the pair of side shields is configured in such a manner that a saturation magnetic flux density thereof increases as a distance from the magnetic pole in the cross track direction increases. Such a configuration allows unwanted divergence component of magnetic flux in a recording magnetic field to be captured while avoiding any excessive capturing of the recording magnetic field, and while preventing any intensity reduction of the recording magnetic field in its entirety. As a result, the recording magnetic field is maintained to have an adequate intensity and spreading of the recording magnetic field is suppressed, so that the recording capabilities are improved.

Perpendicular magnetic write head with side shield saturation magnetic flux density increasing away from magnetic pole

A trailing shield is provided on a trailing side of a magnetic pole with a non-magnetic gap layer in between, and an intermediate layer having negative uniaxial magnetocrystalline anisotropy is provided between the non-magnetic gap layer and the trailing shield. The intermediate layer has a magnetic property in which an easy axis of magnetization is provided in an in-plane direction and thus magnetization is likely to occur in that direction, whereas a difficult axis of magnetization is provided in a direction intersecting the in-plane direction and thus magnetization is less likely to occur in that direction. Accordingly, magnetic flux becomes difficult to excessively flow from the magnetic pole into the trailing shield.

Perpendicular magnetic write head and magnetic recording device

A thin film magnetic head includes a spin valve film that includes a magnetization free layer, a magnetization pinned layer and a non-magnetic spacer layer that is disposed between the magnetization free and pinned layers, and a pair of side layers that are disposed at both sides of the spin valve film in a track width direction and at least in the vicinity of the magnetization free layer and the magnetization pinned layer. Each of the side layers has a bias magnetic field application layer that includes a soft magnetic layer and applies a bias magnetic field in the track width direction to the magnetization free layer, and a gap layer that is positioned between the spin valve film and the bias magnetic field application layer, and the side layers have compression stresses at least in the vicinity of the magnetization pinned layer.

Hideyuki Ukita

Papers

High moment side shield design for area density improvement of perpendicular magnetic recording (PMR) writer

Magnetic head for perpendicular magnetic recording and method of manufacturing same

Perpendicular magnetic write head with side shield saturation magnetic flux density increasing away from magnetic pole

Perpendicular magnetic write head and magnetic recording device

Thin film magnetic head with side layers under compression stress