Dynamic magnetic information storage or retrieval – Fluid bearing head support – Disk record
Reexamination Certificate
2009-11-09
2011-12-20
Castro, Angel A. (Department: 2627)
Dynamic magnetic information storage or retrieval
Fluid bearing head support
Disk record
C360S046000
Reexamination Certificate
active
08081399
ABSTRACT:
Write enhancement circuitry on the head carrier of a magnetic recording disk drive provides additional write current overshoot beyond that provided by the write driver circuitry. An enhancement capacitor is formed with a dielectric layer between two layers of electrically-conductive magnetically-permeable shield material that serve as the capacitor plates. The write enhancement circuitry may also include an enhancement resistor. The enhancement capacitor and resistor are connected between the two terminals on the head carrier that connect to the write head coil. The capacitor and resistor are fabricated on the head carrier at the same time and in the same process as the read head. The first and second capacitor plates are generally coplanar with and formed of the same electrically-conductive magnetically-permeable material that forms the first and second magnetic shields for the read head. The enhancement resistor is a stack of layers that is coplanar with and formed of the same materials as the stack of layers that form the sensor portion of the read head between the two magnetic shields.
REFERENCES:
patent: 5712747 (1998-01-01), Voldman et al.
patent: 5978181 (1999-11-01), Niijima et al.
patent: 6028748 (2000-02-01), Kuroe et al.
patent: 6331919 (2001-12-01), Klaassen et al.
patent: 6404575 (2002-06-01), Yen
patent: 6603623 (2003-08-01), Fontana, Jr. et al.
patent: 6972916 (2005-12-01), Aram et al.
patent: 7054085 (2006-05-01), Lin et al.
patent: 7359149 (2008-04-01), Kiyono et al.
patent: 7394605 (2008-07-01), Amemiya
patent: 7679855 (2010-03-01), Biskeborn et al.
patent: 7796355 (2010-09-01), Benakli et al.
patent: 7835097 (2010-11-01), Aram et al.
patent: 2008/0151436 (2008-06-01), Sato et al.
patent: 2011/0149441 (2011-06-01), Alex et al.
Contreras John Thomas
Seagle David John
Berthold Thomas R.
Castro Angel A.
Hitachi Global Storage Technologies - Netherlands B.V.
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