High Moment Side Shield Design for Area Density Improvement of Perpendicular Magnetic Recording (PMR) Writer

High Moment Side Shield Design for Area Density Improvement of Perpendicular Magnetic Recording (PMR) Writer

A PMR writer is disclosed wherein a hot seed layer (HS) made of a 19-24 kilogauss (kG) magnetic material is formed between a gap layer and a 10-16 kG magnetic layer in the side shields, and between the leading gap and a 16-19 kG magnetic layer in the leading shield to improve Hy_grad and Hy_grad_x w...

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Hauptverfasser: Liu Xiaomin, Ukita Hideyuki, Lee Jiun-Ting, Tang Yuhui, Dovek Moris, Wei Yaguang, Yamaguchi Atsushi, Liu Yue, Nishiyama Michitaka
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Sprache:eng
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INFORMATION STORAGE
INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER
PHYSICS
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creator Liu Xiaomin
Ukita Hideyuki
Lee Jiun-Ting
Tang Yuhui
Dovek Moris
Wei Yaguang
Yamaguchi Atsushi
Liu Yue
Nishiyama Michitaka
description A PMR writer is disclosed wherein a hot seed layer (HS) made of a 19-24 kilogauss (kG) magnetic material is formed between a gap layer and a 10-16 kG magnetic layer in the side shields, and between the leading gap and a 16-19 kG magnetic layer in the leading shield to improve Hy_grad and Hy_grad_x while maintaining write-ability. The HS is from 10 to 100 nm thick and has a first side facing the write pole with a height of ≦0.15 micron, and a second side facing a main pole flared side that may extend to a full side shield height of ≦0.5 micron. First and second sides may form a continuous curve or a double tapered design where first and second sides have different angles with respect to a center plane. The side shield design described herein is especially beneficial for side gaps of 20-60 nm.
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subjects INFORMATION STORAGE
INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER
PHYSICS
title High Moment Side Shield Design for Area Density Improvement of Perpendicular Magnetic Recording (PMR) Writer
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