Western Digital (fremont), Inc.

Read Rite Corporation

Ming Zhao

Mohamad Towfik Krounbi

Ronald A Barr

Yining Hu

Francis H Liu

Matthew R Gibbons

Kenneth E Knapp

James Spallas

Benjamin P Law

Xizeng Shi

Lien-Chang Wang

Hua-Ching Tong

Li He

Jim Watterston

Ming Jiang

David John Seagle

Lei Wang

Yingjian Chen

Kroum Stanimirov Stoev

Ming Sun

Jinqiu Zhang

Mark David Thomas

Marcos Moises Lederman

Billy W Crue, Jr

Jose Antonio Medina

Henry H Yuan

Qing He

Bill W Crue, Jr

Liping Ren

Christopher T Ngo

Kenneth Kung

Systems and methods for controlling stray fields of a magnetic feature are provided. One such method can involve selecting a plurality of materials for a magnetic feature, selecting a plurality of additives, combining the plurality of materials for the magnetic feature and the plurality of additives in an electrolyte solution to form a combined solution, adding nitrogen to the combined solution, degassing the combined solution, depositing the combined solution as a thin film on a wafer using pulse plating, and lapping the thin film to form an edge of the magnetic feature. In several embodiments, the magnetic feature is a component of a magnetic transducer such as a writer pole, a reader shield, or a writer shield.

Methods for controlling stray fields of magnetic features using magneto-elastic anisotropy

A method is provided for fabricating a read element with leads that overlay a top surface of a sensor of the read element. The method includes forming a mask over a sensor layer, then using the mask to define the sensor from the sensor layer. The mask is then narrowed and a lead layer is formed that overlays both ends of the top surface of the sensor without covering a center portion of the top surface.

Self-aligned method for fabricating a high density GMR read element

A head including a write element for writing data to a magnetic media, and methods for its production are provided. A write element of the invention includes one or more of a recessed first pole, a heat sink layer, and a shortened yoke length. A method of the invention provides forming an anti-reflective layer before forming a mask layer. During photolithography the anti-reflective layer suppresses undesirable reflections off of features, such as vertical sidewalls, that otherwise limit how closely to such features portions of the mask layer can be formed.

Write element with recessed pole and heat sink layer for ultra-high density writing

A method for providing a magnetic recording transducer is disclosed. The method includes providing a first pole having front and rear portions and a back gap on the rear portion. The method also includes providing an insulator on the first pole. The method includes providing a write gap and providing a portion of a second pole on at least the write gap. A portion of the write gap resides on the front portion of the first pole. A portion of the insulator covers a portion of the first pole between the portion of the second pole and the back gap. The method also includes providing a mask that covers the back gap and exposes the portion of the second pole and the insulator. The method also includes performing a pole trim that can substantially remove the portion of the insulator covering the remaining portion of the first pole.

Method of manufacturing a magnetic recording transducer

A method for fabricating a magnetic recording head writer. The writer includes a bottom magnetic pole and a write gap formed over the bottom pole and a coil trench formed in the bottom pole. A top magnetic pole is provided as two layers with the first layer including front and back tips with spaced apart walls positioned adjacent the trench bottom defining trench sides. A pole cover layer is included that is made up of a thin layer of insulating material deposited to cover sides and bottom of the coil trench. A bottom coil is formed on the pole cover layer in the bottom of the coil trench and coil insulation is provided between coil elements and adjacent trench walls and covemg the coil. A top coil with insulation is formed over the planarized bottom coil insulation and the top pole second layer is formed over the top coil.

Method of fabricating thin film write heads with a shortened yoke and improved dimension control

Write element with reduced yoke length for ultra-high density writing

Method of fabricating a write element with a reduced yoke length

A writer for magnetic recording heads. The writer includes a bottom magnetic pole and a write gap formed over the bottom pole and a coil trench formed in the bottom pole. A top magnetic pole is provided as two layers with the first layer including front and back tips with spaced apart walls positioned adjacent the trench bottom defining trench sides. A pole cover layer is included that is made up of a thin layer of insulating material deposited to cover the sides and bottom of the coil trench. A bottom coil is formed on the pole cover layer in the bottom of the coil trench and coil insulation is provided between the coil elements and adjacent the trench walls and covering the coil. A top coil with insulation is formed over the planarized bottom coil insulation and the top pole second layer is formed over the top coil.

Thin film recording head with a buried coil providing a shortened yoke and improved dimension control

A disk drive write head having in consecutive layers a bottom pole, a write gap layer, a first insulation layer, a coil, a second insulation layer having an insulation layer boundary, and a top pole on the second insulation layer. The top pole includes a main body portion and a nose portion and has a flare line at the location where the nose portion expands to become the main body portion. The top pole further includes a curved contour portion having a contour boundary, a tip which terminates in an air bearing surface, and a flat portion on the top surface of the nose extending between the tip and the contour boundary. The insulation layer boundary is recessed from the air bearing surface such that the top pole contour boundary lies substantially close to the flare line, thus producing a top pole top surface which is substantially flat.

Write head architecture for improved manufacturability

The present invention provides an improved bias magnet-to-magnetoresistive element interface and method of fabrication. In a preferred embodiment, the wall/walls of an MR element opposing a bias layer are formed by over etching to provide vertical side walls without taper. In the preferred embodiment, a protective element is formed over the MR element to protect it during etch processes. In some embodiments, a filler layer is deposited prior to bias layer formation. In CIP embodiments, any portion of the filler layer forming on vertical side walls of the MR element is etched to provide an exposed side wall surface for contiguous bias layer formation. In CPP embodiments, the filler layer forms on a vertical back wall and electrically insulates the MR element from the bias layer. In CIP and CPP embodiments, tapered portions of the bias material, which form overhanging the MR element, are removed by directional etching to improve the direction and stability of the induced longitudinal field within the MR element. In some CIP embodiments, tapered overhang removal allows for formation of improved lead structures, which may be deposited on the MR element closer to the side walls, and which are not pinched off by the overhang of an underlying bias layer, thus improving current density profile and definition of the actual effective track width of the device.

Thin film read head structure with improved bias magnet-to-magnetoresistive element interface and method of fabrication

A system and method for providing a head for reading data is disclosed. The method and system include providing a magnetoresistive element and providing a flux guide having a high resistivity. The magnetoresistive element has an end. The flux guide also has an end. The end of the flux guide is adjacent to the end of the magnetoresistive element.

Method and system for providing a magnetoresistive head having higher efficiency

A magnetoresistive (MR) device includes a sensor that has a first surface electrically coupled to a first lead structure, and a second surface electrically coupled to a second lead structure. The first lead structure and second lead structure each include an insulation layer with an aperture that is aligned with the sensor. Conductive materials, disposed within the apertures, are electrically coupled to said first and second surfaces of the sensor, respectively, thereby restricting the current flow of an applied current as it passes through the sensor. The first lead structure can further include a shield and a sense lead, each of which are electrically coupled with the conductive material disposed within the first aperture, while the second lead structure can further include a shield and sense lead which are electrically couple with said conductive material disposed with the second aperture. Also, the conductive material can form part of the shield or sense lead.

CPP Magnetoresistive device with reduced edge effect and method for making same

System for providing a magnetoresistive head having higher efficiency

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Fremont, CA, United States of America

Ming Zhao