Dynamic magnetic information storage or retrieval – Head – Head surface structure
Reexamination Certificate
2011-03-22
2011-03-22
Davis, David D (Department: 2627)
Dynamic magnetic information storage or retrieval
Head
Head surface structure
Reexamination Certificate
active
07911736
ABSTRACT:
A storage device and method use a head that is fabricated using photolithography, and the head is purposely powered up during a material removal process, such as lapping, so that the head's expansion (that would be formed on being powered up during normal usage in a drive) is planarized. On being cooled to room temperature, the head has a concave shape in a pole tip region, the concavity indicative of a volume occupied by material that formed the head expansion, and that has been removed by planarization. Thereafter, the head is powered up in a storage device and method, so that the head has a surface other than flat but within a predetermined range, and the head supplies a signal through the surface to a recording medium.
REFERENCES:
patent: 2920149 (1960-01-01), Koren
patent: 3398870 (1968-08-01), Mullan et al.
patent: 3787638 (1974-01-01), Murai
patent: 3821815 (1974-06-01), Abbott et al.
patent: 3872507 (1975-03-01), Sano et al.
patent: 4025927 (1977-05-01), Nelson
patent: 4097909 (1978-06-01), King et al.
patent: 4214287 (1980-07-01), Stromsta et al.
patent: 4322764 (1982-03-01), Tanaka
patent: 4551772 (1985-11-01), Sliger
patent: 4605977 (1986-08-01), Matthews
patent: 4651235 (1987-03-01), Morita et al.
patent: 4675986 (1987-06-01), Yen
patent: 4777544 (1988-10-01), Brown et al.
patent: 4816932 (1989-03-01), Yates
patent: 4816934 (1989-03-01), Tsuyuguchi
patent: 4912883 (1990-04-01), Chang et al.
patent: 4914868 (1990-04-01), Church et al.
patent: 4931887 (1990-06-01), Hegde et al.
patent: 5065483 (1991-11-01), Zammit
patent: 5072324 (1991-12-01), Lin et al.
patent: 5095613 (1992-03-01), Hussinger et al.
patent: 5113300 (1992-05-01), Ikeda et al.
patent: 5142425 (1992-08-01), Gailbreath et al.
patent: 5175938 (1993-01-01), Smith
patent: 5203119 (1993-04-01), Cole
patent: 5214589 (1993-05-01), Tang
patent: 5321882 (1994-06-01), Zarouri et al.
patent: 5361547 (1994-11-01), Church et al.
patent: 5403457 (1995-04-01), Nago et al.
patent: 5408365 (1995-04-01), Van Doorn et al.
patent: 5561896 (1996-10-01), Voegeli et al.
patent: 5588199 (1996-12-01), Krounbi et al.
patent: 5591073 (1997-01-01), Turgeon
patent: 5591533 (1997-01-01), Pinarbasi
patent: 5632669 (1997-05-01), Azarian et al.
patent: 5668676 (1997-09-01), Voorman et al.
patent: 5678086 (1997-10-01), Gandola et al.
patent: 5701223 (1997-12-01), Fontana et al.
patent: 5772493 (1998-06-01), Rottmayer et al.
patent: 5790336 (1998-08-01), Voorman et al.
patent: 5978163 (1999-11-01), Cunningham
patent: 5991113 (1999-11-01), Meyer et al.
patent: 5993566 (1999-11-01), Lin
patent: 6057975 (2000-05-01), Yaeger et al.
patent: 6064261 (2000-05-01), Stein et al.
patent: 6072671 (2000-06-01), Gill
patent: 6074566 (2000-06-01), Hsiao et al.
patent: 6093083 (2000-07-01), Lackey
patent: 6131271 (2000-10-01), Fontana, Jr. et al.
patent: 6188531 (2001-02-01), Chang et al.
patent: 6193584 (2001-02-01), Rudy et al.
patent: 6226149 (2001-05-01), Dill, Jr. et al.
patent: 6249393 (2001-06-01), Billings et al.
patent: 6262858 (2001-07-01), Sugiyama et al.
patent: 6269425 (2001-07-01), Mounes-ToUS si et al.
patent: 6287170 (2001-09-01), Hao et al.
patent: 6295580 (2001-09-01), Sturges et al.
patent: 6311212 (2001-10-01), Chong et al.
patent: 6349363 (2002-02-01), Cai et al.
patent: 6366416 (2002-04-01), Meyer et al.
patent: 6384994 (2002-05-01), Smith et al.
patent: 6452735 (2002-09-01), Egan et al.
patent: 6473258 (2002-10-01), Shitara et al.
patent: 6473259 (2002-10-01), Kuo et al.
patent: 6493183 (2002-12-01), Kasiraj et al.
patent: 6501606 (2002-12-01), Boutaghou et al.
patent: 6504666 (2003-01-01), Patti et al.
patent: 6609948 (2003-08-01), Fontana et al.
patent: 6679762 (2004-01-01), Fatula, Jr. et al.
patent: 6709321 (2004-03-01), Ishizaki et al.
patent: 6857937 (2005-02-01), Bajorek
patent: 7119990 (2006-10-01), Bajorek et al.
patent: 2001/0036028 (2001-11-01), Putnam et al.
patent: 61-255523 (1986-11-01), None
patent: 04-366408 (1992-12-01), None
patent: 05-282614 (1993-10-01), None
patent: 09-016920 (1997-01-01), None
K. Babcock et al. “Automated Measurement of Pole Tip Recession with New-Generation Atomic Force Microscopes”, HTML version of the file http://www.semiconductorfabtech.com/olddatatech/explore/downloads/01.155.pdf, download on Jan. 16, 2008, 6 pages.
Dr. K. Gilleo et al., “Materials and Processes for MR and GMR Heads and Assemblies”, http://et-trends.com/files.HDD-heads1.pdf, downloaded on Jan. 16, 2008, pp. 1-10.
Gilleo, K. et al. “Materials and Processes for MR and GMR Heads and Assemblies”, www.cooksonsemi.com/staystik.htm, pp. 1-10; published on Internet, believed to be prior to Jul. 24, 2001.
Babcock, K. et al. “Automated Measurement of Pole Tip Recession with New-Generation Atomic Force Microscopes”, Nov. 8, 2000, Datatech, www.veeco.com/pdf/PTRMain.pdf, pp. 155-160.
Davis David D
WD Media, Inc.
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