| As HDD continuously pursue
higher TPI and Higher rotational speeds, disturbance
such as air turbulence inside the HDD have more
significant impact on the suspension behavior
and the head positioning capability more than
ever before. In order
to facilitate high servo bandwidth, a new suspension
design to achieve high resonance frequency and
robustness against air turbulence was proposed.
NHK Spring spent 3 years on development and
in 1999 shipped its first Fuma Suspensions in
the fall of 1999.
FUMA, the Chinese characters for
which mean magic wind, is a moniker bestowed
by NHK Spring personnel. Fuma is an assemblage
of several members, replacing the conventional
single-unit structure.
Fuma uses members of 100
micron in thickness for its edge and base. The
two members are connected by a flat spring thick,
at a distance of 0.6mm.
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