Dual Free Layer Reader for Future Recording Head
- Resource Type
- Conference
- Authors
- Liu, Xiaoyong; Marui, Daniele; Albuquerque, Goncalo; Shang, Changhe; Wang, Lei; Diao, Zhitao; Zheng, Yuankai; Hu, Chih-Ching; Wang, Yung-Hung; Liu, Hongxue; Li, Guanxiong; Roy, Anup; Chien, C.J.; Mao, Ming; Freitag, James; Okada, Yukimasa; Li, Yunfei
- Source
- 2022 IEEE 33rd Magnetic Recording Conference (TMRC) Magnetic Recording Conference (TMRC), 2022 IEEE 33rd. :1-2 Aug, 2022
- Subject
- Communication, Networking and Broadcast Technologies
Components, Circuits, Devices and Systems
Computing and Processing
Photonics and Electrooptics
Signal Processing and Analysis
Linearity
Media
Magnetic heads
Magnetic recording
Testing
Reader Head
dual free layer sensor
resolution
magnetic recording
- Language
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/in 2 .