Headway Technologies, Incorporated

Feiyue Li

Xiaomin Liu

Yuhui Tang

Yue Liu

Yoshitaka Sasaki

Jiun-Ting Lee

Weihao Xu

Wenjie Chen

Shiwen Huang

Cherng-Chyi Yan

Po-Kang Wang

Moris Musa Dovek

Cherng-Chyi Han

Yaguang Wei

Luc Thomas

The present embodiments relate to a PMR write head with a trailing shield that comprises a FeCoNiM composition. The FeCoNiM composition can be formed via an electroplating process by adding Fe, Co, Niand a transition metal salt to an aqueous solution comprised of other additives in an electroplating cell that has an Ni or Co as the anode. The plated HD magnetic material as the trailing shield in a PMR writer can minimize a wide area track erasure (WATE). Further, a high moment high damping shield can lower bit error rate (BER) and increase aerial density capability (ADC) of the write head.

Electroplating of high damping material for trailing shield in a perpendicular magnetic recording writer

A Perpendicular Magnetic Recording (PMR) writer is disclosed with an all wrap around (AWA) shield design in which one or more of the leading shield, second trailing shield, and side shields consist of a high damping (HD) magnetic material having a damping constant &#x2267;0.04. A first trailing shield between the write gap and second trailing shield is a 19-24 kG hot seed layer. The HD magnetic layer may be FeNiRe with a Re content of 3 to 15 atomic %. Preferably, the HD magnetic layer has a coercivity &#x3c;50 Oe and is a 10-19 kG material. One or both of the main pole leading and trailing sides may be tapered. Wide adjacent track erasure is minimized while area density capability is maintained. In other embodiments, the HD magnetic material may be one of FeNiM, FeNM, FeCoM, or FeCoNiM where M is a 3d, 4d, or 5d transition metal.

Perpendicular magnetic recording (PMR) write shield design with minimized wide adjacent track erasure (WATE)

A magnetic layer that may serve as a top pole layer and bottom pole layer in a magnetic write head is disclosed. The magnetic layer has a composition represented by FeCoNiVin which w, x, y, and z are the atomic % of Fe, Co, Ni, and V, respectively, and where w is between about 60 and 85, x is between about 10 and 30, y is between 0 and about 20, z is between about 0.1 and 3, and wherein w+x+y+z=100. An electroplating process having a plating current density of 3 to 30 mA/cmis used to deposit the magnetic layer and involves an electrolyte solution with a small amount of VOSOwhich is the V source. The resulting magnetic layer has a magnetic saturation flux density Bgreater than 1.9 Telsa and a resistivity &#x3c1; higher than 70 &#x3bc;ohms-cm.

Electrodeposition of FeCoNiV films with high resistivity and high saturation magnetization

A non-conformal integrated side shield structure is disclosed for a PMR write head wherein the sidewalls of the side shield are not parallel to the pole tip sidewalls. Thus, the side gap distance between the leading pole tip edge and side shield is different than the side gap distance between the trailing pole tip edge and side shield. As a result, there is a reduced side fringing field and improved overwrite performance. The side gap distance is constant with increasing distance from the ABS along the main pole layer. A fabrication method is provided where the trailing shield and side shield are formed in the same step to afford a self-aligned shield structure. Adjacent track erasure induced by flux choking at the side shield and trailing shield interface can be eliminated by this design. The invention encompasses a tapered main pole layer in a narrow pole tip section.

Method to make an integrated side shield PMR head with non-conformal side gap

Electrodeposition of FeCoNiV films with high resistivity and high saturation magnetization for magnetic head fabrication

A process is described for the fabrication, through electrodeposition, of FeCoNi(x=60-71, y=25-35, z=0-5) films that have, in their as-deposited form, a saturation magnetization of at least 24 kG and a coercivity of less than 0.3 Oe. A key feature is the addition of aryl sulfinates to the plating bath along with a suitable seed layer.

Electroplated magnetic film for read-write applications

Method to make an integrated side shield PMR head with non conformal side gap

Growing community of inventors

Fremont, CA, United States of America

Feiyue Li