Dynamic magnetic information storage or retrieval – Head – Core
Reexamination Certificate
2008-06-03
2008-06-03
Miller, Brian E. (Department: 2627)
Dynamic magnetic information storage or retrieval
Head
Core
C360S125480, C360S125590
Reexamination Certificate
active
07382577
ABSTRACT:
A trimmed upper pole piece for a magnetic write head, said pole piece having a tapered profile that is widest at its trailing edge. Such a pole piece is capable of writing narrow tracks with sharply and well defined patterns and minimal overwriting of adjacent tracks. The necessary taper is produced by using NiCr, NiFeCr, Rh or Ru as write gap filling materials which have an etch rate which is substantially equal to the etch rate of the other layers forming the pole piece and are highly corrosion resistant. As a result, the write gap does not protrude to mask the effects of the ion-beam etch used to form the taper.
REFERENCES:
patent: 4970616 (1990-11-01), Ramaswamy
patent: 5578342 (1996-11-01), Tran et al.
patent: 5901432 (1999-05-01), Armstrong et al.
patent: 5966277 (1999-10-01), Koshikawa et al.
patent: 6199267 (2001-03-01), Koshikawa et al.
patent: 6243939 (2001-06-01), Chen et al.
patent: 6477002 (2002-11-01), Mizoh
patent: 6480355 (2002-11-01), Kamijima
patent: 6504675 (2003-01-01), Shukh et al.
patent: 6614621 (2003-09-01), Kakehi et al.
patent: 6731460 (2004-05-01), Sasaki
patent: 6738223 (2004-05-01), Sato et al.
patent: 6887355 (2005-05-01), Han et al.
patent: 7251103 (2007-07-01), Hsiao et al.
patent: 2002/0015266 (2002-02-01), Han et al.
patent: 2002/0181162 (2002-12-01), Chen et al.
patent: 2004/0027729 (2004-02-01), Lo et al.
patent: 2005/0024771 (2005-02-01), Le
patent: 2005/0036237 (2005-02-01), Yazawa et al.
patent: 2006/0288565 (2006-12-01), Le et al.
patent: 2001014610 (2001-01-01), None
patent: 2001-160207 (2001-06-01), None
patent: 2002-197616 (2002-07-01), None
patent: 2002-217029 (2002-08-01), None
patent: 2002-280217 (2002-09-01), None
patent: 2003-006813 (2003-01-01), None
Chen Mao-Min
Han Cherng-Chyi
Liu Fenglin
Wang Po Kang
Ackerman Stephen B.
Headway Technologies Inc.
Miller Brian E.
Saile Ackerman LLC
LandOfFree
Magnetic write head having a wider trailing edge pole structure does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Magnetic write head having a wider trailing edge pole structure, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Magnetic write head having a wider trailing edge pole structure will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2801789