Electric heating – Inductive heating – Metal working
Reexamination Certificate
2006-02-24
2008-08-26
Paschall, Mark H (Department: 3742)
Electric heating
Inductive heating
Metal working
C219S501000, C219S491000, C219S497000
Reexamination Certificate
active
07417209
ABSTRACT:
A system and method for preventing crosstalk noise from being superimposed on a read signal due to noise from a heater line for a slider in a recording disk drive is disclosed. A heater line pair to the slider is not grounded but is in a floating state with respect to an actuator support structure. A heater driver allows a heater current to flow between a positive power supply voltage and a negative power supply voltage. The heater line pair is not grounded, so an impedance is high as viewed from a magnetic disk. Thus, it is possible to effectively suppress a noise transmitted from the magnetic disk and read signal quality is kept from deteriorating due to the crosstalk from the heater line.
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Contreras John
Ikeda Takashi
Nagano Yumi
Nishiyama Nobumasa
Ohsawa Toyomi
Bracewell & Giuliani LLP
Hitachi Global Storage Technologies Netherlands BV
Paschall Mark H
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