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Class 29/603.08 - Treating to affect magnetic properties


Subclass of Class 29 - Metal working
Definition: Process wherein the fabricated head structure or component
No. of patents: 207
Last issue date: 10/05/2010


1            
NumberTitleIssue Date
7805828Method of manufacturing thin-film magnetic head
A method of manufacturing a thin-film magnetic head including forming the first shield layer; forming the magnetoresistive device, carried out after forming the first shield layer, a heat treatment providing exchange coupling between the ferromagnetic layer and the ...
10/05/2010
7536772Method of manufacturing a bottom spin valve with a laminated CoFe free layer
A method is given for the manufacture of a bottom spin valve (BSV) spin filter spin valve (SFSV) type read sensor. The sensor has a composite, ultra-thin (
05/26/2009
7497007Process of manufacturing a TMR device
A high performance TMR element is fabricated by inserting an oxygen surfactant layer (OSL) between a pinned layer and AlOx tunnel barrier layer in a bottom spin valve configuration. The pinned layer preferably has a SyAP configuration with an outer pinned layer, a R...
03/03/2009
7441324Method for preventing magnetic damage to a GMR head during back-end processing
A method is provided for preserving the transverse biasing of a GMR (or MR) read head during back-end processing. In a first preferred embodiment, the method comprises magnetizing the longitudinal biasing layers of the read head in a transverse direction, so that th...
10/28/2008
7389575Method of manufacturing permanently magnetized elements
There is disclosed a method of manufacturing a plurality of removable permanently magnetized elements from a substrate comprising ferrite material. The method prints symbol images on the substrate with an offset, automatic sheet-fed press, and die cuts the symbol im...
06/24/2008
7370404Method for resetting pinned layer magnetization in a magnetoresistive sensor
A spin valve sensor in a read head has a spacer layer which is located between a self-pinned AP pinned layer structure and a free layer structure. The free layer structure is longitudinally stabilized by first and second hard bias layers which abut first and second ...
05/13/2008
7332099Ion bombardment of electrical lapping guides to decrease noise during lapping process
A method for reducing noise in a lapping guide. Selected portions of a magnetoresistive device wafer are bombarded with ions such that a magnetoresistive effect of lapping guides is reduced. The device is lapped, using the lapping guides to measure an extent of the ...
02/19/2008
7327538Lead overlay sensor with improved current path
In a lead overlay (LOL) type of read head first and second insulation layers are employed with the first insulation layer being located between a top surface of a first hard bias layer and a first lead layer and the second insulation layer is located between the top...
02/05/2008
7325295Structure/method to form bottom spin valves for ultra-high density
Two embodiments of a GMR sensor of the bottom spin valve (BSV) spin filter spin valve (SFSV) type are provided together with methods for their fabrication. In each embodiment the sensor includes an in-situ naturally oxidized specularly reflecting layer (NOL) which i...
02/05/2008
7324312Sensor with in-stack bias structure providing exchange stabilization
A magnetic head having an in-stack bias structure and a free layer structure. The in-stack bias structure includes an antiferromagnetic layer; a first bias layer positioned towards the antiferromagnetic layer, a magnetic moment of the first bias layer being pinned b...
01/29/2008
7323067Method of manufacturing magneto-resistance effect type head
A method of manufacturing a magneto-resistance effect type head that includes an element portion of magneto-resistance effect type and reproduces a read signal of data from a recording medium by the element portion, is proposed. The method includes applying a predet...
01/29/2008
7322096Method for fabricating magnetic write heads
A magnetic write head and method for bulk fabrication of the same are provided. A trench is formed in a nonmagnetic substrate. A first magnetically permeable layer is deposited in the trench of the substrate. An optional first insulating layer is deposited in the tr...
01/29/2008
7320169Self-pinned GMR structure by annealing
In a conventional spin valve the shunt resistance of the pinning layer reduces the overall efficiency of the device. This problem has been overcome by using IrMn for the pinning layer at a thickness of about 20 Angstroms or less. For the IrMn to be fully effective i...
01/22/2008
7313856Method of manufacturing a magnetoresistive sensor with a thin antiferromagnetic layer for pinning antiparallel coupled tabs
A manufacturing method for a spin valve sensor with a thin antiferromagnetic (AFM) layer exchange coupled to a self-pinned antiparallel coupled bias layer in the lead overlap regions is provided. The spin valve sensor comprises forming a ferromagnetic bias layer ant...
01/01/2008
7301734Longitudinal bias structure with improved magnetic stability
A GMR sensor having improved longitudinal biasing is provided as is a method of forming it. The improved biasing is provided by longitudinal biasing structures in which a soft magnetic layer is interposed between a hard magnetic biasing layer and the lateral edge of...
11/27/2007
7301727Return pole of a transducer having low thermal induced protrusion
A transducer including a return pole having a return pole tip extending to an external surface of the transducer. The external surface of the return pole tip has an area that is larger than a cross-sectional area of the return pole taken parallel to the external sur...
11/27/2007
7284316Method for forming a hard bias structure in a magnetoresistive sensor
A method for forming a hard bias structure in a magnetoresistive sensor is disclosed. A magnetoresistive sensor having a soft magnetic bias layer, spacer layer, and a magnetoresistive layer, is formed over a substrate having a gap layer. A mask is formed over a port...
10/23/2007
7283336Method and apparatus for providing a current-in-plane (CIP) GMR sensor with an improved in-stack bias layer with a thinner sensor stack
A method and apparatus for providing a current-in-plane (CIP) GMR sensor with an improved in-stack bias layer with a thinner sensor stack is disclosed. Improved pinning of a free-layer in a CIP GMR sensor stack is provided using dual in-stack biasing layers. The sen...
10/16/2007
7283337Abutted exchange bias design for sensor stabilization
A hard bias (HB) structure for biasing a free layer in a MR sensor within a magnetic read head is comprised of a main biasing layer with a large negative magnetostriction (λS) value. Compressive stress in the device after lapping induces a strong in-plan...
10/16/2007
7280324Magnetoresistive sensor having improved antiparallel tab free layer biasing
A magnetoresistive sensor having improved free layer biasing and track width control. ...
10/09/2007
7275304Method of forming a hard bias structure in a magnetic head
A hard bias (HB) structure for biasing a free layer in a MR sensor within a magnetic read head is comprised of a main biasing layer with a large negative magnetostriction (λS) value. Compressive stress in the device after lapping induces a strong in-plan...
10/02/2007
7275302Method of forming a disc pack
A method of forming a disc pack for use in a disc drive is provided. The method includes forming at least one alignment feature between an inner diameter and an outer diameter of each of a plurality of discs. The at least one alignment feature of a first disc of the...
10/02/2007
7256969Discrete step stabilization of narrow-track AMR read sensors
A method and system are provided for implementing discrete step stabilization of AMR read sensors in tape or disk drives. In one implementation, a plurality of discrete step stabilizers and AMR read sensor elements are arranged with a rotational symmetry coupled wit...
08/14/2007
7251102ABS through aggressive stitching
Aggressive (i.e. tight tolerance) stitching offers several advantages for magnetic write heads but at the cost of some losses during pole trimming. This problem has been overcome by replacing the alumina filler layer, that is used to protect the stitched pole during...
07/31/2007
7248445CPP magnetic sensing element and method for making the same
A magnetic sensing element includes a composite film, a lower shield layer, and a lower electrode layer and an upper electrode layer for supplying a current perpendicular to the composite film. The composite film has an antiferromagnetic layer, a pinned magnetic lay...
07/24/2007
7237320Methods of orienting an easy axis of a high-aspect ratio write head for improved writing efficiency
A pole piece of a magnetic write head is formed over a substrate and includes a pole tip having a width that is less than its height which is normal the substrate. Due to stress-anisotropy, the pole tip structure has an inherent easy-axis which is oriented in an unf...
07/03/2007
7234228Method of fabricating novel seed layers for fabricating spin valve heads
A method for forming a bottom spin valve sensor element with a novel seed layer and synthetic antiferromagnetic pinned layer. The novel seed layer comprises an approximately 30 angstrom thick layer of NiCr whose atomic percent of Cr is 31%. On this seed layer there ...
06/26/2007
7227726Method and system for providing a dual-stripe magnetoresistive element having periodic structure stabilization
A dual-stripe element magnetroresistive read head for reading information from a magnetic tape. The read head includes a first insulating layer, a first active magnetoresistive layer formed on the first insulating layer, a second insulating layer formed on the first...
06/05/2007
7221545High HC reference layer structure for self-pinned GMR heads
A magnetic head having a free layer, an antiparallel (AP) pinned layer structure spaced apart from the free layer, and a high coercivity structure. The high coercivity structure pins a magnetic orientation of the AP pinned layer structure. The high coercivity struct...
05/22/2007
7219415Method of manufacturing thin film magnetic head
The method of manufacturing a thin film magnetic head is capable of precisely forming a core section with preventing the variation of the write-core head caused by ion milling for removing an electric conductive film and capable of improving yield of products. The m...
05/22/2007
7210217Method of manufacturing thin film magnetic head
A wire gap film is formed on a flat coplanar surface formed on a bottom pole by a bottom track pole and a thin film coil, first and second magnetic material films constituting a top pole are formed on a flat surface of the thin film coil, and the first and second ma...
05/01/2007
7204014Magnetic head with thin gap layers
A method for fabricating a magnetic head wherein a read head portion of the magnetic head includes a second gap insulation layer that includes a first portion that is fabricated upon the electrical leads of the read head and a second portion that is fabricated upon ...
04/17/2007
7204013Method of manufacturing a magnetoresistive sensor
In a method of forming a magnetoresistive sensor, first and second magnetic leads are formed. Next, a junction of magnetic and electrically conductive material is formed between the first and second magnetic leads. Finally, the magnetic and electrical conductivity o...
04/17/2007
7196872Sliders bonded by a debondable encapsulant comprising different polymers formed via in situ polymerization
A slider assembly is provided comprising a plurality of sliders bonded by a debondable solid encapsulant comprised of different first and second polymers The solid encapsulant is comprised of a polymer prepared by polymerizing an encapsulant fluid comprising a homog...
03/27/2007
7196877Magnetoresistive element, magnetoresistive head and magnetic reproducing apparatus
A magnetoresistive element includes a magnetoresistive film having a magnetization pinned layer, a magnetization free layer, and a nonmagnetic intermediate layer. A magnetization direction of the magnetization pinned layer is substantially fixed in an external magne...
03/27/2007
7193892Magnetic switching with expanded hard-axis magnetization volume at magnetoresistive bit ends
A magnetoresistive apparatus and method of operation with improved switching characteristics is provided. Switching of a magnetic direction of a magnetic layer of a magnetoresistive bit is promoted by parallel rotation of local magnetic direction of ends of the bit ...
03/20/2007
7190560Self-pinned CPP sensor using Fe/Cr/Fe structure
A magnetic head having a free layer, an antiparallel (AP) pinned layer structure spaced apart from the free layer, and a high coercivity structure positioned towards the AP pinned layer structure on an opposite side thereof relative to the free layer. The high coerc...
03/13/2007
7182669Methods and systems for planarizing workpieces, e.g., microelectronic workpieces
Planarizing workpieces, e.g., microelectronic workpieces, can employ a process indicator that is adapted to change an optical property in response to a planarizing condition. This process indicator may, for example, change color in response to reaching a particular ...
02/27/2007
7178222Method of manufacturing a tunneling magnetoresistive element
Insulating layers are formed on both sides of a multilayer film, and bias layers are formed in contact with at least portions of both end surfaces of a free magnetic layer. The bias layers are formed so as not to extend to the upper surface of the multilayer film. I...
02/20/2007
7180716Fabrication method for an in-stack stabilized synthetic stitched CPP GMR head
A method for fabricating a stitched CPP synthetic spin-valve sensor with in-stack stabilization of its free layer. The method can also be applied to the formation of a stitched tunneling magnetoresistive sensor. The free layer is strongly stabilized by magnetostatic...
02/20/2007
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