双自由层阅读器为未来的记录头

2022 IEEE 33rd Magnetic Recording Conference (TMRC) Pub Date : 2022-08-01 DOI:10.1109/TMRC56419.2022.9918608

Xiaoyong Liu, Daniele Marui, G. Albuquerque, C. Shang, L. Wang, Z. Diao, Yuan-kai Zheng, Chih-Ching Hu, Yung-Hung Wang, Hongxue Liu, Guanxiong Li, Anup Roy, C. Chien, M. Mao, J. Freitag, Yukimasa Okada, Yunfei Li

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引用次数: 0

摘要

硬盘面密度的增长对磁头和介质以及HDI的发展提出了重大挑战。本文综述了一种新的读写器设计——双自由层(DFL)，以解决目前基于自旋阀的单自由层(SFL)读写头的局限性。成功制备了RG窄至14nm、磁道宽度低至20nm的DFL读写头，并具有良好的稳定性。磁记录测试表明，与SFL相比，线性分辨率提高了4%以上，误码率降低了0.1阶。这一结果表明，DFL读卡器设计是一种稳健且有吸引力的新型读卡器，适用于维持HDD面密度增长超过2Tb/in2。

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Dual Free Layer Reader for Future Recording Head

HDD areal density growth poses significant challenges on head and media and HDI developments. In this paper, we review a novel reader design - dual free layer (DFL) to address current limitations from spin-valve based single free layer (SFL) reader head. DFL reader heads with narrower RG down to 14nm and trackwidth down to 20nm have been successfully fabricated with good stability. Magnetic recording test shows over 4% linear resolution improvement and up to 0.1 order bit-error-rate reduction over SFL. This result indicates DFL reader designs are robust and attractive candidates for novel reader suitable for sustaining HDD areal density growth beyond 2Tb/in2.

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2022 IEEE 33rd Magnetic Recording Conference (TMRC)

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