Millipede - a MEMS-based scanning-probe data-storage system

Ultrahigh storage densities of up to 1 Tb/in./sup 2/ or more can be achieved by using local-probe techniques to write, read back, and erase data in very thin polymer films. The thermomechanical scanning-probe-based data-storage concept called Millipede combines ultrahigh density, small form factor,...

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Bibliographic Details
Published in:IEEE transactions on magnetics 2003-03, Vol.39 (2), p.938-945
Main Authors: Eleftheriou, E., Antonakopoulos, T., Binnig, G.K., Cherubini, G., Despont, M., Dholakia, A., Durig, U., Lantz, M.A., Pozidis, H., Rothuizen, H.E., Vettiger, P.
Format: Article
Language:English
Subjects:
Applied sciences
Atomic force microscopy
Channels
Data storage
Density
Electronics
Exact sciences and technology
Image storage
Magnetic and optical mass memories
Magnetic memory
Magnetism
Material storage
Mathematical analysis
Modulation
Modulation coding
Multiplexing
Other magnetic recording and storage devices (including tapes, disks, and drums)
Scanning probe data storage
Servosystems
Storage and reproduction of information
Thermomechanical processes
Thin films
Timing
Tracking
Tunneling
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Summary:Ultrahigh storage densities of up to 1 Tb/in./sup 2/ or more can be achieved by using local-probe techniques to write, read back, and erase data in very thin polymer films. The thermomechanical scanning-probe-based data-storage concept called Millipede combines ultrahigh density, small form factor, and high data rate. After illustrating the principles of operation of the Millipede, a channel model for the analysis of the readback process is introduced, and analytical results are compared with experimental data. Furthermore, the arrangement of data-storage fields as well as dedicated fields for servo and timing control is discussed, and system aspects related to the readback process, multiplexing, synchronization, and position-error-signal generation for tracking are introduced. Finally, the application of (d,k) modulation coding as a means to further increase areal density is presented, and the effect on the user data rates discussed.
ISSN:0018-9464
1941-0069
DOI:10.1109/TMAG.2003.808953