Author :
Tong, H.C. ; Shi, X. ; Liu, F. ; Qian, C. ; Dong, Z.W. ; Yan, X. ; Barr, R. ; Miloslavsky, L. ; Zhou, S. ; Perlas, J. ; Prabhu, P. ; Mao, M. ; Funada, S. ; Gibbons, M. ; Leng, Q. ; Zhu, J.G. ; Dey, S.
Author_Institution :
Read-Rite Corp., Fremont, CA, USA
Abstract :
We have designed and fabricated dual spin valve heads with synthetically pinned layers. They have excellent sensitivity. The read-back waveform has a small asymmetry and that is also insensitive to the bias current. The read gap length is of 0.14 μm and the write gap length is of 0.2 μm. The read heads have a nominal magnetic trackwidth of 0.5 μm and a nominal write magnetic trackwidth of 0.8 μm. The write heads were conventional inductive heads with their pole geometry defined by focused ion beam (FIB) technology. The dual spin valve heads have achieved an areal read/write density as high as 14.5 Gb/in2 at a data transfer rate of 23~24 MB/sec. The sensitivity of the readers is as high as 3.6 mVp-p/μm. The bit aspect ratio is as high as 14
Keywords :
focused ion beam technology; magnetic heads; spin valves; GMR; areal read/write density; aspect ratio; data transfer rate; dual spin valve head; focused ion beam technology; inductive head; magnetic trackwidth; sensitivity; sensor film design; synthetic pinned layer; thermal stability; Bandwidth; Frequency estimation; Magnetic films; Magnetic heads; Sensor phenomena and characterization; Signal to noise ratio; Spin valves; Temperature sensors; Thermal conductivity; Thermal sensors;
