Seagate Technology Incorporated

Martin Louis Plumer

Vee Sochivy Kong

Nurul Amin

Venkateswara R Inturi

Richard P Michel

Frank Edgar Stageberg

Johannes Van Ek

Feng Y Wang

Dimitar Velikov Dimitrov

Michael C Kautzky

Declan Macken

Mark Thomas Kief

Taras Grigorievich Pokhil

Ibro Tabakovic

Steven Carl Riemer

Ned Tabat

Charles H Tolman

Steve C Riemer

Steven B Slade

James Keith Price

Taras Grigoryevich Pokhil

Steven Paul Bozeman

Gavin Lee Brinkley

Daniel J Dummer

Alaxender M Shukh

Alexandar Mikhailovich Shukh

Vladyslav A Vas&prime;ko

Vladyslav A Vas'Ko

Amin Nurul

A magnetic recording head with an overall planar design and tight dimensional control of throat height and notch width is achieved below the gap. Writer poles include very high magnetic moment material on both sides of the writer gap. Additionally the pole tips are shaped to provide high field with good spatial gradient for optimal writing conditions, thereby extending the capability of longitudinal recording heads for high density and high frequency applications.

Recording head writer with high magnetic moment material at the writer gap and associated process

A magnetic recording head having a write pole formed in a point. The narrow width of the write pole can be manufactured using existing equipment, reduces the number of steps required to build the recording head, and results in a recording head that has other advantages. Forming the write pole in a point is done using two masking steps and mill processing. The writer and reader are positioned next to each other so that the second masking step which forms the point of the writer pole also defines the back edge of the stripe.

Magnetic recording head with a point writer pole

A magnetic recording head having an air bearing surface for confronting a surface of a rotating disc and comprising a pole tip and a generally rounded and substantially planar body attached to the pole tip is disclosed. The width of the pole tip defines a track width of data written to the rotating disc. The generally rounded shape of the top pole body is such that top pole magnetization gradually changes its direction and follows the edges of the body. Further, the pole tip has low remanence, gradual spin structure and no domain walls formed near the pole tip.

Rounded top pole

A magnetic writer having an air bearing surface for confronting a surface of a rotating disc is disclosed. The magnetic writer includes a bottom pole and a top pole. The top pole includes a first top pole portion and a second top pole portion connected by a top pole extension. The top pole extension, which preferably has a uniform width at the air bearing surface, orients a magnetization of the first top pole portion substantially parallel to an air bearing surface of the magnetic writer. The bottom pole includes a base pole and a notch pole. The base pole is recessed from the air bearing surface to prevent or reduce fringe erasure fields. The notch pole, which abuts the base pole and extends from the air bearing surface to at least a magnetic throat height of the magnetic writer, has a magnetization oriented perpendicular to the air bearing surface.

High gradient disc drive writer

A beveled writing pole includes a top portion, a beveled portion, and a throat portion. The top portion has an end that defines a writing pole tip. The beveled portion adjoins the top portion and has a bevel that extends from the writing pole tip and increases a thickness of the writing pole proximate the pole tip. The throat portion is formed of the top and beveled portions and has tapered sides that extend from the writing pole tip and increase a width of the writing pole proximate the writing pole tip. A method of forming the beveled writing pole is also presented.

Method of forming a beveled writing pole of a perpendicular writing element

A transducing head includes at least three magnetic layers. At least two of these magnetic layers function as shields of a reader portion of the transducing head, and at least one of these magnetic layers functions as a pole of a writer portion of the transducing head. Importantly, at least one of the three magnetic layers is formed of a thin film structure having a first and a second ferromagnetic layer, a nonmagnetic spacer layer, and a bias layer. The spacer layer is positioned between the first and the second ferromagnetic layers. The bias layer is positioned adjacent the first ferromagnetic layer. The second ferromagnetic layer has a thickness-magnetic moment product substantially equal to a thickness-magnetic moment product of the first ferromagnetic layer. An easy axis of the second ferromagnetic layer is substantially parallel to an easy axis of the first ferromagnetic layer.

Single domain state laminated thin film structure for use as a magnetic layer of a transducing head

A magnetic head in a magnetic storage system is provided in which materials that do not individually display high permeability and low coercivity are satisfactorily employed in a write head when coupled to adjacent high permeability layers. The magnetic head includes a gap layer which separates a pair of poles. At least one pole of the pair of poles includes a pole layer formed of a high permeability material and a seed layer adjacent to the pole layer. The seed layer is formed of a high moment low permeability material having a high saturation magnetic moment greater than 2.1 Tesla and a low permeability of about 10-100. The high permeability material of the pole layer causes the permeability of the adjacent seed layer to substantially increase from about 10-100 to about 1400-1600, thereby providing a pole with high permeability and high saturation moment. In addition, a method of forming a magnetic head for use in a magnetic storage system is provided.

Writer pole employing a high saturation moment, low permeability layer adjacent to writer gap

A magnetic read head having an air bearing surface, a magnetoresistive sensor, an insulator layer, and first and second current contacts. The magnetoresistive sensor has a first portion adjacent to the air bearing surface and a second portion distal from the air bearing surface. The first and second current contacts are positioned in electrical contact with opposite edges of the first portion of the magnetoresistive sensor, and the insulator layer is positioned between the second portion of the magnetoresistive sensor and each of the first and second current contacts.

Magnetic read head with an insulator layer between an MR sensor and rear portions of current contacts to provide enhanced sensitivity

A magnetic recording head has a magnetic pole tip and a seed layer upon which the magnetic pole tip is formed. The seed layer is preferably formed of a high magnetic moment material having a saturation magnetization of at least 1.8 Tesla and a high resistance to corrosion. In preferred embodiments of the present invention, the seed layer is preferably formed of 2.1 Tesla Fe Co Ni , 1.8 Tesla Fe Ni Co Tesla Fe Cr , or 1.9 Tesla Fe Co Cr , wherein the subscripts indicate a preferred range of atomic percentages for each element in the given alloy.

High magnetic moment seed layer materials for writer pole tips

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Bloomington, MN, United States of America

Martin Louis Plumer