Patent ID: 7726190

Claim:
A microstructure inspection device for evaluating a property of at least one microstructure having a movable part formed on a substrate, comprising: a sound wave generation unit for outputting a sound wave to said microstructure in a test, said sound wave generation unit including a plurality of sound sources each configured to output said sound wave, and an adjustment unit for adjusting a composite wave to serve as a predetermined test sound wave, said composite wave being composed of sound waves output from said plurality of sound sources; and an evaluation unit for detecting how said movable part of said microstructure moves in response to said test sound wave, and for evaluating said property of said microstructure from how said movable part moves, as detected, wherein said plurality of sound sources are arranged to each have a difference in distance to said movable part, the difference being an integer multiple of a wavelength of said sound wave; and said microstructure has said movable part at a position allowing a directivity coefficient R(θ)=1 so as to allow a composite sound field from said plurality of sound sources to be maximized.