Atomic force microscope cantilevers for combined thermomechanical data writing and reading

King, William P.; Kenny, Thomas W.; Goodson, Kenneth E.; Cross, Graham; Despont, Michel; Du¨rig, Urs; Rothuizen, Hugo; Binnig, Gerd K.; Vettiger, Peter
February 2001
Applied Physics Letters;2/26/2001, Vol. 78 Issue 9, p1300
Academic Journal
Heat conduction governs the ultimate writing and reading capabilities of a thermomechanical data storage device. This work investigates transient heat conduction in a resistively heated atomic force microscope cantilever through measurement and simulation of cantilever thermal and electrical behavior. The time required to heat a single cantilever to bit-writing temperature is near 1 μs and the thermal data reading sensitivity ΔR/R is near 1x10[sup -4] per vertical nm. Finite-difference thermal and electrical simulation results compare well with electrical measurements during writing and reading, indicating design tradeoffs in power requirements, data writing speed, and data reading sensitivity. We present a design for a proposed cantilever that is predicted to be faster and more sensitive than the present cantilever. © 2001 American Institute of Physics.


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