Publisher : The Korean Society of Mechanical Engineers
DOI : 10.22634/KSME-A.19220.127.116.111
Title & Authors
Design, Fabrication and tTsting of a Microswitch Using Snap-through Buckling Phenomenon Go, Jeung-Sang; Cho, Young-Ho; Kwak, Byung-Man; Park, Kwan-Hum;
A snapping-beam microswitch has been designed, fabricated and tested. From a design analysis, necessary and sufficient conditions for a snap-through switching fouction have been derived for a clamped shallow beam. The necessary condition has resulted in a geometric relation, in which the ratio of beam thickness to initial beam deflection plays a key role in the snapping ability. The sufficient condition for the snapping action has been obtained as a function of the inertia force due to applied acceleration, and the electrostatic force, adjustable by an inter-electrode voltage. For experimental investigations, a set of microbeams of silicon dioxide/silicon bimorphs have been fabricated. Geometric size and mechanical behavior of each material film have been measured from on-chip test structures. Estimated and measured characteristics of the fabricated devices are compared.