Please use this identifier to cite or link to this item: http://hdl.handle.net/1959.13/45132

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Title
A self servo writing scheme for a MEMS storage device with sub-nanometer precision
Author/Creator
Sebastian, Abu;  Pantazi, Angeliki;  Moheimani, S. O. Reza;  Pozidis, Haris;  Eleftheriou, Evangelos
Institution
The University of Newcastle. Faculty of Engineering & Built Environment, School of Electrical Engineering and Computer Science
Description
In the probe-based storage concept being pursued by IBM, a MEMS based micro-scanner is used to position the storage medium relative to the read/write probes. To achieve repeatable positioning over a large storage area, it is necessary to have medium-derived position information. Dedicated servo-fields are typically employed to obtain medium-derived position information. Sub-nanometer positioning resolutions are desirable while writing these servo-fields. Such precise positioning at acceptable bandwidth using a global position sensor requires the directed design of the closed-loop noise sensitivity transfer function so as to minimize the impact of sensing noise. This paper describes one such control architecture based on resonant controllers where the impact of measurement noise on positioning is minimal while providing sufficient damping and hence satisfactory tracking performance. It is estimated that the positioning error due to sensing noise is a remarkably low 0.25 nm. Experimental results are also presented that show error-free operation of the device at high densities.
Relation
17th World Congress of the International Federation of Automatic Control. Proceedings of the 17th World Congress of the International Federation of Automatic Control (Seoul, Korea 6-11 July, 2008) p. 9242-9247
Relation
http://www.ifac-papersonline.net/Detailed/37256.html
Date
2008
Publisher
International Federation of Automatic Control (IFAC)
Keyword(s)
microsystems;  nanotechnology;  microtechnology;  identification and control methods;  measurment and actuation
Resource Type
conference paper
Identifier
http://hdl.handle.net/1959.13/45132
Identifier
ISBN:9781123478902
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Subject
"A self servo writing scheme for a MEMS storage device with sub-nanometer precision"
 
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