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Exploring Low Loss Suspension Interconnects for High Data Rates in Hard Disk Drives

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5 Author(s)
Hentges, R.T. ; Hutchinson Technol. Inc., Hutchinson, MN ; Pro, J.D. ; Roen, M.E. ; VanHecke, G.J.
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For high data rate applications, current suspension interconnect solutions should stay above 50 Ohm differential impedance (Zdiff ) due to footprint limitations and frequency dependent ohmic losses of the stainless steel plane at low Zdiff . This paper describes the impedance and bandwidth (BW) design space of today's interconnects and also shows why this technology is still compatible with current system front-ends up to 3 Gb/s. Furthermore, the benefits of reduced power and higher overshoot using less than 50 Ohm impedance and high bandwidth interconnects are explored with a system model. Three alternate low impedance interconnect structures are used to demonstrate these benefits, and are explored analytically and evaluated for mechanical tradeoffs.

Published in:

Magnetics, IEEE Transactions on  (Volume:44 ,  Issue: 1 )

Date of Publication:

Jan. 2008

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