Patent ID: 6799464
Filing Date: 2004-10-05
Classification: G01N,G01Q

Abstract:
A method of determining the resonant frequencies of a cantilever comprising the steps of:fixedly attaching a cantilever to a base, wherein a distal end of the cantilever remains free, and wherein, the cantilever has a known spring contestant k; exciting the cantilever proximate the base, wherein the excitation occurs through a range of frequencies; measuring any displacement in the distal end of the cantilever simultaneous to the step of exciting the cantilever; detecting a plurality of resonance frequencies by comparing the measured displacement in the distal end of the cantilever to the excitation; and determining a slope force separation curve, k, based upon the following equation: 13&it;1+cos&it;â€ƒ&it;Î¾&CenterDot;cosh&it;â€ƒ&it;Î¾sin&it;â€ƒ&it;Î¾&CenterDot;cosh&it;â€ƒ&it;Î¾-cos&it;â€ƒ&it;Î¾&CenterDot;sinh&it;â€ƒ&it;Î¾&it;Î¾3=kÎº.