Dynamic magnetic information storage or retrieval – General recording or reproducing – Thermomagnetic recording or transducers
Reexamination Certificate
2006-06-27
2006-06-27
Hudspeth, David (Department: 2651)
Dynamic magnetic information storage or retrieval
General recording or reproducing
Thermomagnetic recording or transducers
C360S125330
Reexamination Certificate
active
07068453
ABSTRACT:
A thermally-assisted perpendicular magnetic recording head includes a write pole tip for generating a magnetic write field in the perpendicular magnetic recording layer, a magnetic shield that confines the write field essentially to the data track to be recorded, an electrically resistive heater for heating the recording layer in the presence of the write field, and a return pole. The write pole tip width essentially defines data track width and is substantially surrounded by the magnetic shield. The shield may include side shields with ends located on opposite sides of the write pole tip and a trailing shield having an end spaced from the write pole tip. The resistive heater is wider than the data track and heats both the data track and adjacent tracks, but thermally-assisted magnetic recording occurs only in the data track because the confined magnetic field in the adjacent tracks is less than the required write field.
REFERENCES:
patent: 5583727 (1996-12-01), Parkin
patent: 5673163 (1997-09-01), Cohen
patent: 5986978 (1999-11-01), Rottmayer et al.
patent: 6493183 (2002-12-01), Kasiraj et al.
patent: 6842313 (2005-01-01), Mallary
patent: 6906898 (2005-06-01), Kawato
patent: 2004/0075944 (2004-04-01), Macken et al.
patent: 2004/0223257 (2004-11-01), Santini
patent: 2004/0240108 (2004-12-01), Shukh
patent: 2005/0018348 (2005-01-01), Lille et al.
patent: 2005/0024771 (2005-02-01), Le
patent: 2005/0094315 (2005-05-01), Payne et al.
patent: 2005/0122612 (2005-06-01), Albrecht et al.
“Data Recording at Ultra High Density”, IBM Technical Disclosure Bulletin, vol. 39, No. 7, Jul. 1996, p. 237.
“Thermally-Assisted Magnetic Recording”, IBM Technical Disclosure Bulletin, vol. 40, No. 10, Oct. 1997, p. 65.
Kanai et al., “Numerical analysis of narrow-track single-pole-type head with side shields for 1 Tb/in2 recording”, J. Appl. Phys., vol. 93, No. 10, Parts 2 & 3, May 15, 2003, pp. 7738-7740.
Terris Bruce David
Thiele Jan-Ulrich
Berthold Thomas R.
Hitachi Global Storage Technologies - Netherlands B.V.
Hudspeth David
Kapadia Varsha A.
LandOfFree
Thermally-assisted perpendicular magnetic recording system... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Thermally-assisted perpendicular magnetic recording system..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Thermally-assisted perpendicular magnetic recording system... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3615433