Read Rite Corporation

The University of Alabama

Syed A Hossain

Zhupei Shi

Mark S Miller

Yingjian Chen

Lien-Chang Wang

Chun He

Billy W Crue, Jr

Bill Crue

Song Pang

Devendra P Rathi

Martin R Parker

A preferred embodiment provides a thin film write head having upper and lower pole structures each having pedestal pole tips formed with CoNiFe. The pedestal pole tips may have from about 60% to about 70% Co and from about 10% to about 15% Ni. The upper pole structure of the preferred embodiment has a laminated yoke portion having upper and lower layers. The lower layer is stitched to the pedestal pole tip of the upper pole structure and comprises FeXN, where X is selected from the group consisting of Rh, Ta, Hf, Al, Zr, Ti, Ru, Si, Cr, V, Si, Sr, Nb, Mo, Ru, and Pd. The upper layer comprises NiFe preferably having from about 15% to about 55% of Fe. It is preferred to define the lower layer of the yoke by etching FeXN material using the upper layer as a hard mask. In a preferred method and embodiment, the top surfaces of the conductor coil and the upper pedestal pole tip are planarized with an inorganic capping layer formed thereover to insulate the conductor coil from the yoke and to provide a low apex angle to form the yoke over.

Thin film write head for improved high speed and high density recording

A magnetoresistive head having improved overwrite performance and a small trackwidth. The magnetoresistive head having a magnetic yoke formed of first and second poles joined at a back gap region and having an opposite write gap region. A pedestal with a top portion constructed of a high saturation moment material is provided on the first pole, limited to the write gap region and spaced from the read element so as to prevent popcorn noise in read sensor. The high moment pedestal is raised above surrounding structure causing the second pole to define a very low apex angle in the write gap region.

Advance pole trim writer with moment P1 and low apex angle

Magnetically permeable, high magnetic saturation, primarily iron NiFe alloys are formed on thin seed layers by sputtering and electroplating. Pole layers a few microns in thickness can be formed of magnetically superlative, primarily iron NiFe alloys in this manner for transducers that may be used in information storage systems. The seed layers may include Ni,Fe,or Cr, and the magnetically superlative NiFe alloy may be Ni,Fe,. The magnetically superlative NiFe alloy has increased concentration of a body centered cubic crystalline phase and/or a decreased concentration of a face centered cubic crystalline phase compared with conventional Ni,Fe,. A laminated pole structure has a dielectric interlayer along with seed layers and magnetically superlative, primarily iron NiFe layers.

High moment and high permeability transducer structures and formation

The present invention provides a thin film write head having an improved laminated flux carrying structure and method of fabrication. The preferred embodiment provides laminated layers of: high moment magnetic material, and easily aligned high resistivity magnetic material. In the preferred embodiment, the easily aligned laminating layer induces uniaxial anisotropy, by exchange coupling, to improve uniaxial anisotropy in the high moment material. This allows deposition induced uniaxial anisotropy by DC magnetron sputtering and also provides improved post deposition annealing, if desired. It is preferred to laminate FeXN, such as FeRhN, or other crystalline structure material, with an amorphous alloy material, preferably Co based, such as CoZrCr. In the preferred embodiment, upper and lower pole structures may both be laminated as discussed above. Such laminated structures have higher B,than structures with insulative laminates, and yokes and pole tips and may be integrally formed, if desired, because flux may travel along or across the laminating layers. The preferred embodiment of the present invention improves soft magnetic properties, reduces eddy currents, improves hard axis alignment while not deleteriously affecting the coercivity, permeability, and magnetostriction of the structure, thus allowing for improved high frequency operation.

Thin film write head with improved laminated flux carrying structure and method of fabrication

An inductive write head includes a first pole and a second pole that form a yoke having a write gap between the first pole and second pole. The second pole is formed of a particular Co,ZR,CR,compound. More specifically, the second pole is formed where &ldquo;a&rdquo; is in the range of about 2 atomic percent to about 18 atomic percent, and &ldquo;b&rdquo; is in the range of about 0.5 atomic percent to about 6 atomic percent. The magnetic write element also includes a conductive coil which lies between the first pole and the second pole. The inductive write head also includes a first yoke pedestal attached to the first pole, and a second yoke pedestal attached to the second pole, with the write gap formed therebetween. Further, the first yoke pedestal has a pedestal width that defines the write element trackwidth and that is smaller than the pedestal width of the second yoke pedestal.

Method of forming an inductive write head for magnetic data storage media

An inductive write head includes a first pole and a second pole that form a yoke having a write gap between the first pole and second pole. The second pole is formed of a particular Co,Zr,Cr,compound. More specifically, the second pole is formed where &ldquo;a&rdquo; is in the range of about 2 atomic percent to about 18 atomic percent, and &ldquo;b&rdquo; is in the range of about 0.5 atomic percent to about 6 atomic percent. The magnetic write element also includes a conductive coil which lies between the first pole and the second pole. The inductive write head also includes a first yoke pedestal attached to the first pole, and a second yoke pedestal attached to the second pole, with the write gap formed therebetween. Further, the first yoke pedestal has a pedestal width that defines the write element trackwidth and that is smaller than the pedestal width of the second yoke pedestal.

Inductive write head for magnetic data storage media

Magnetoresist elements having good giant magnetoresistance characteristics of at least 6 percent are prepared by depositing alternating layers of magnetic alloy and non-magnetic copper or copper alloys in a thickness of 22-40 angstroms, which element, as deposited, exhibits ferromagnetic coupling. The multi-layer element, which may include up to 20 bilayers of magnetic material/non-magnetic material is then annealed at a temperature of about 250.degree.-325.degree. C. for a period of at least 15 minutes up to 10 hours. The resulting element exhibits good GMR characteristics which are thermally stable, and insensitive to minor variations in the thickness of the non-magnetic layer.

Growing community of inventors

Fremont, CA, United States of America

Syed A Hossain