Patent ID: 7331468
Filing Date: 2008-02-19
Classification: G01N

Abstract:
1. A device for separating a fine solid component, said device comprising: a substrate having a first surface and a second surface opposite the first surface, the substrate having a recess, a cavity, and a first through-hole, the recess being provided in the second surface, the recess having a bottom, the cavity opening to the first surface, the first through-hole allowing the cavity to communicate with the bottom of the recess; and a diaphragm on the first surface of the substrate, the diaphragm having a second through-hole therein at a position corresponding to the cavity, the second through-hole having a diameter smaller than a diameter of the first through-hole, wherein the diaphragm includes a first conductive layer on the first surface of the substrate, a piezoelectric layer on the first conductive layer, and a second conductive layer on the piezoelectric layer.