Dynamic magnetic information storage or retrieval – Head – Magnetoresistive reproducing head
Reexamination Certificate
2006-05-09
2006-05-09
Castro, Angel (Department: 2653)
Dynamic magnetic information storage or retrieval
Head
Magnetoresistive reproducing head
C029S603180
Reexamination Certificate
active
07042684
ABSTRACT:
Two embodiments of a GMR sensor of the bottom spin valve (BSV) spin filter spin valve (SFSV) type are provided together with methods for their fabrication. In each embodiment the sensor includes an in-situ naturally oxidized specularly reflecting layer (NOL) which is a more uniform and dense layer than such layers formed by high temperature annealing or reactive-ion etching. In one embodiment, the sensor has an ultra thin composite free layer and a high-conductance layer (HCL), providing high output and low coercivity. In a second embodiment, along with the same NOL, the sensor has a laminated free layer which includes a non-magnetic conductive layer, which also provides high output and low coercivity. The sensors are capable of reading densities exceeding 60 Gb/in2.
REFERENCES:
patent: 6181534 (2001-01-01), Gill
patent: 6268985 (2001-07-01), Pinarbasi
patent: 6338899 (2002-01-01), Fukuzawa et al.
patent: 6348274 (2002-02-01), Kamiguchi et al.
patent: 6466418 (2002-10-01), Horng et al.
patent: 6613380 (2003-09-01), Gill
patent: 6621667 (2003-09-01), He et al.
patent: 6654211 (2003-11-01), Gill et al.
patent: 6709767 (2004-03-01), Lin et al.
patent: 6756135 (2004-06-01), Hasegawa et al.
patent: 6888704 (2005-05-01), Diao et al.
patent: 6903907 (2005-06-01), Hasegawa
patent: 6913782 (2005-07-01), Kula et al.
“Bottom Spin Valve with Laminated CoFe FreeLayer for Ultra-High Density Recording”, Serial# filed , assigned to the same assignee.
“Structure and Process to Fabricate Lead Overlay (LOL) on the Bottom Spin Valve”, U.S. Appl. No. 10/124,004, filed Apr. 17, 2002, assigned to the same assignee.
Horng Cheng T.
Tong Ru-Ying
Ackerman Stephen B.
Castro Angel
Headway Technologies Inc.
Saile George D.
LandOfFree
Structure/method to form bottom spin valves for ultra-high... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Structure/method to form bottom spin valves for ultra-high..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Structure/method to form bottom spin valves for ultra-high... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3552301