Hitachi Global Storage Technologies Netherlands B.v.

Michael Ming Hsiang Yang

Edward Hin Pong Lee

Wen-Chien David Hsiao

Vladimir Nikitin

Eric Wayne Flint

Yuan Yao

Sue Siyang Zhang

Yiping Hsiao

Andrew Chiu

John Jaekoyun Yang

Yvette Chung Nga Winton

Unal Murat Guruz

Jorge Daniel Colonia

Douglas Kei Tak Tsang

A method for manufacturing a magnetic write head that allows the location of the flare point of a write pole to be accurately located relative to the air bearing surface. The method includes the construction of a lapping guide having an edge feature that is easily and accurately located relative to the flare point of the write pole. This edge feature provides an abrupt change in electrical resistance across the lapping guide at a point when lapping should be terminated. And, since this feature can accurately located relative to the flare point, this provides an easily discernable ending point for lapping.

Method for manufacturing an electrical lapping guide for magnetic write head core width optimization

A method for manufacturing a magnetic head for magnetic data recording, that allows a lapping termination point to be easily and accurately determined during lapping. The method includes constructing a lapping guide that has an electrically is formed to provide an abrupt change in resistance at a point where lapping should be terminated. This point of abrupt resistance change is located relative to the flare point of the write pole that the distance between the flare point and the air bearing surface can be accurately maintained. This abrupt resistance change also makes it possible to monitor both a stripe height defining rough lapping and an angled kiss lapping process using a single measurement channel.

Method for manufacturing a slider for a perpendicular magnetic recording head

A magnetic write head for perpendicular magnetic recording that is resistant to write pole and trailing shield protrusion. The write pole includes a magnetic return pole that is magnetically connected with the trailing shield, the return pole being resistant to deformation or recession such as from mechanically abrasive slider cleaning operations such as soda blast.

Magnetic write head with upper return pole optimization for reduced trailing shield protrusion

A structure and method for performing magnetic inductance testing of write heads formed on a wafer. The structure and method allows for the effective inductive testing of magnetic write heads at wafer level even if the write heads have an inductance that is too low to be effectively measured directly. A test head is constructed having a structure similar to that of the write heads, but having a significantly higher magnetic inductance. The higher magnetic inductance of the write head can be provided by extending the shaping layer to or beyond the air bearing surface plane ABS. The inductance of the test head can be further increased by increasing the width of the portion of the shaping layer that extends to the ABS (ie. shaping layer throat) and by increasing the width of the write pole throat.

Method for manufacturing a magnetic head for perpendicular magnetic data recording

A disk drive thin-film write head has a first ferromagnetic pole tip that includes a pedestal pole layer and a capping layer on the pedestal pole layer. A substantial portion of the pedestal pole layer is formed of a lower-moment alloy and the capping layer is formed of a higher-moment alloy and is made thick enough to compensate for the lower-moment alloy in the pedestal pole layer. The pedestal pole layer may be a bilayer of two different NiFe alloys with the upper layer in the bilayer having a higher moment, and the capping layer may be a CoFe alloy. The width of the pedestal pole layer is substantially reduced to reduce the pole tip area exposed. The reduced pole tip area and the increased use of lower-moment alloys enable a thinner protective film to be used to protect the pole tips from corrosion.

Disk drive thin-film inductive write head with pole tip structure having reduced susceptibility to corrosion

A magnetic write head for use in a data recording system having first and second magnetic pole, the first pole having a P1 pedestal. An electrically conductive coil passes through a space between the first and second poles for inducing a magnetic flux through the yoke formed by the first and second poles. A bi-layer insulation layer disposed between the poles includes a layer of photoresist for preventing voids and a layer of alumina formed thereover to provide a structural brace to prevent recession of the P1 pedestal during manufacturing operations such as soda blast.

Bilayer coil insulation for magnetic write heads to minimize pole recession

During fabrication of a write head via holes are first opened in a gap layer, followed by formation of seed layers instead of the other way around. Moreover a first seed layer is formed, and without the first seed layer being used a second seed layer is formed. The second seed layer (which is the topmost layer) is used in plating to form coils (e.g. of copper) for the write head. After coil formation, the first seed layer is used for plating to form vias (e.g. of NiFe). The two seed layers may be formed in a single operation by using two different targets in a vacuum deposition chamber. Moreover, a single insulation layer is sufficient to insulate and protect all plated elements, regardless of whether they are formed by use of the first seed layer or the second seed layer.

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Campbell, CA, United States of America

Michael Ming Hsiang Yang