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Electrical, Thermal, and Mechanical Characterization of Silicon Microcantilever Heaters

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6 Author(s)
Jungchul Lee ; George W. Woodruff Sch. of Mech. Eng., Georgia Inst. of Technol., Atlanta, GA ; Thomas Beechem ; Tanya L. Wright ; Brent A. Nelson
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Silicon atomic force microscope (AFM) cantilevers having integrated solid-state heaters were originally developed for application to data storage, but have since been applied to metrology, thermophysical property measurements, and nanoscale manufacturing. These applications beyond data storage have strict requirements for mechanical characterization and precise temperature calibration of the cantilever. This paper describes detailed mechanical, electrical, and thermal characterization and calibration of AFM cantilevers having integrated solid-state heaters. Analysis of the cantilever response to electrical excitation in both time and frequency domains aids in resolving heat transfer mechanisms in the cantilever. Raman spectroscopy provides local temperature measurement along the cantilever with resolution near 1 mum and 5degC and also provides local surface stress measurements. Observation of the cantilever mechanical thermal noise spectrum at room temperature and while heated provides insight into cantilever mechanical behavior and compares well with finite-element analysis. The characterization and calibration methodology reported here expands the use of heated AFM cantilevers, particularly the uses for nanomanufacturing and sensing

Published in:

Journal of Microelectromechanical Systems  (Volume:15 ,  Issue: 6 )