Dynamic magnetic information storage or retrieval – Head – Core
Reexamination Certificate
2006-04-25
2009-08-18
Chen, Tianjie (Department: 2627)
Dynamic magnetic information storage or retrieval
Head
Core
Reexamination Certificate
active
07576951
ABSTRACT:
A magnetic write head for perpendicular magnetic recording having a write pole with a concave trailing edge. The magnetic write pole can have a trapezoidal shape with first and second laterally opposed sides that are further apart at the trailing edge than at the leading edge. The write head may or may not include a magnetic trailing shield, and if a trailing shield is included it is separated from the trailing edge by a non-magnetic write gap layer. The concave trailing edge improves magnetic performance such as by improving the transition curvature. A method for constructing the write head includes forming a magnetic write pole by forming a mask structure over a deposited write pole material, the mask structure having an alumina hard mask and an image transfer layer such as DURAMIDE®. An alumina fill layer is then deposited and a chemical mechanical polish is performed to open up the image transfer layer. A reactive on etch is performed to remove the image transfer layer and a reactive ion mill or reactive ion etch is performed to remove the alumina hard mask and form a concave surface on the write pole.
REFERENCES:
patent: 4592801 (1986-06-01), Hara et al.
patent: 5075956 (1991-12-01), Das
patent: 5402295 (1995-03-01), Suzuki et al.
patent: 5673163 (1997-09-01), Cohen
patent: 5850326 (1998-12-01), Takano et al.
patent: 6229678 (2001-05-01), Xue et al.
patent: 6316329 (2001-11-01), Hirota et al.
patent: 6358635 (2002-03-01), Min et al.
patent: 6391212 (2002-05-01), Cohen
patent: 6687085 (2004-02-01), Minor et al.
patent: 6697221 (2004-02-01), Sato et al.
patent: 6700760 (2004-03-01), Mao
patent: 6738233 (2004-05-01), Khizrocv et al.
patent: 6741421 (2004-05-01), Mochizuki et al.
patent: 6771462 (2004-08-01), Khizroev et al.
patent: 6833976 (2004-12-01), Hsu et al.
patent: 6901651 (2005-06-01), Sato et al.
patent: 6950277 (2005-09-01), Nguy et al.
patent: 6952325 (2005-10-01), Sato et al.
patent: 6954340 (2005-10-01), Shukh et al.
patent: 7120988 (2006-10-01), Le et al.
patent: 2002/0027754 (2002-03-01), Ding et al.
patent: 2003/0112562 (2003-06-01), Dimitrov et al.
patent: 2004/0161636 (2004-08-01), Hujanen et al.
patent: 2004/0184190 (2004-09-01), Han et al.
patent: 2004/0218312 (2004-11-01), Montano
patent: 2005/0041337 (2005-02-01), Yazawa et al.
patent: 2005/0068665 (2005-03-01), Le et al.
patent: 2005/0068669 (2005-03-01), Hsu et al.
patent: 2005/0068678 (2005-03-01), Hsu et al.
patent: 2005/0073773 (2005-04-01), Sasaki et al.
patent: 2005/0083605 (2005-04-01), Hu et al.
patent: 2005/0117250 (2005-06-01), Oikawa
patent: 2005/0122622 (2005-06-01), Maruyama et al.
patent: 2005/0141137 (2005-06-01), Okada et al.
patent: 2005/0190479 (2005-09-01), Terris et al.
patent: 2006/0002019 (2006-01-01), Guthrie et al.
patent: 2006/0044681 (2006-03-01), Le et al.
patent: 2007/0115584 (2007-05-01), Balamane et al.
patent: 62-8320 (1987-01-01), None
patent: 11-31906 (1999-11-01), None
patent: 2000-298968 (2000-10-01), None
Okada et al., “Newly Developed Wraparound-Shielded Head For Perpendicular Recording” IEEE Transactions on Magnetics, vol. 41, No. 10, Oct. 2005.
Kawabe et al., “Selective Ion Beam Etching of AI2O3Films” J. Electrochem. Soc., vol. 138, No. 9, Sep. 1991.
Jayasekara et al., “A Reactive Ion Milling Process for Patterning Narrow Track Iron Nitride Recording Head Poles At The Wafer Level” IEEE Transactions on Magnetics, vol. 33, No. 5, Sep. 1997.
Allen Donald G.
Baer Amanda
Feldbaum Michael
Guthrie Hung-Chin
Hsiao Wen-Chien (David)
Chen Tianjie
Hitachi Global Storage Technologies - Netherlands B.V.
Zila-Kotab, PC
LandOfFree
Perpendicular magnetic write head having a magnetic write... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Perpendicular magnetic write head having a magnetic write..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Perpendicular magnetic write head having a magnetic write... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4123051