Investigation for Mechanism of Far Track Interference in Hard Disk Drives

被引：2
|
作者：
Shimokoshi, Masayoshi [1 ]
Hsiao, Wen-Chien [2 ]
Kaya, Ahmet [2 ]
Luo, Yansheng [2 ]
Cheng, Nelson [2 ]
Ramamoorthy, Lakshmi [2 ]
Jen, David [2 ]
Schouterden, Kris [2 ]
机构：
[1] Hitachi Global Storage Technol Japan Ltd, Fujisawa, Kanagawa 2528588, Japan
[2] HGST, San Jose, CA 95135 USA
来源：
IEEE TRANSACTIONS ON MAGNETICS | 2015年 / 51卷 / 07期
关键词：
Adjacent track interference (ATI); far track interference (FTI); hard disk drive (HDD); magnetic domain and wall; perpendicular magnetic recording; wrap around shield (WAS); ERASURE; DENSITY; CHALLENGES; DESIGN; HEADS;
D O I：
10.1109/TMAG.2015.2402271
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
In hard disk drives (HDDs) using perpendicular magnetic recording, an adjacent track interference (ATI) is a major barrier to increasing areal density because both strong writing and narrow track pitch are required. Recent head/disk combinations have exhibited not only ATI, but also a phenomenon we call far track interference (FTI). FTI is a gradual magnetic damage to written data on nearby but non-adjacent tracks that accumulate with increasing number of writes. We developed HDD level measurement ways to detect FTI and investigate the FTI mechanism considering skew angle and external field effects. We also confirmed that the minor shape change of wrap around shield (WAS) causes difference of magnetic domain structures on WAS and FTI incidence. The results support the hypothesis that the FTI is created by structures of magnetic domains and walls on a WAS of a single-pole head on the HDD.
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页数：8
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