Mounting Body, Ultrasonic Sensor, And Multi-Feed Detection Device

原文（中国語）

The circuit substrateincludes the first wiring layerelectrically coupled to the circuit, the element substrateincludes a first substrate, a diaphragm, a piezoelectric element, the second substrate, and a second wiring layerelectrically coupled with the piezoelectric element, and it includes the third wiring layercoupled with the first wiring layerand second wiring layer, and the protectorthat covers the third wiring layer