Patent ID: 9221171
Filing Date: 2015-12-29
Classification: B06B,B25J,G01B,G01L

Abstract:
1. A complex device comprising: a substrate having a thick portion, a cavity surrounded by the thick portion and a membrane arranged over the thick portion so as to bridge the cavity; and a plurality of piezoelectric elements, each of which is formed by stacking a lower electrode, a piezoelectric film and an upper electrode in this order on one surface of the membrane opposite to the thick portion, wherein: the piezoelectric elements are electrically separated from each other; a part of the piezoelectric elements has a projecting portion made of an electrical insulating material; the projecting portion is arranged on the upper electrode; the part of piezoelectric elements provides a vertical pressure detection element for detecting a vertical pressure applied in a vertical direction, in which the piezoelectric elements are stacked; the piezoelectric elements further have an ultrasonic element, which implements at least one of ultrasonic transmission or ultrasonic reception; the ultrasonic element is one of the piezoelectric elements other than the vertical pressure detection element; and the ultrasonic element is arranged over at least the cavity of the substrate in a horizontal direction perpendicular to the vertical direction.