Patent ID: 7490517
Filing Date: 2009-02-17
Classification: G01D,G01S

Abstract:
1. A sensor attachment structure comprising: a sound receiving member for receiving an ultrasound; an ultrasonic sensor attached to the sound receiving member, the ultrasonic sensor including a semiconductor substrate having first and second surfaces opposite to each other and a substrate recess portion recessed from the first surface of the semiconductor substrate so as to form a membrane in the semiconductor substrate; and a cap member located between at least a section of the sound receiving member and the semiconductor substrate to cover the second surface of the semiconductor substrate, wherein: the membrane is provided such that the ultrasonic sensor detects the ultrasound based on the vibration of the membrane; and the cap member has a first surface bonded to the sound receiving member, and a second surface that is bonded to the second surface of the semiconductor substrate at an outer periphery section of the membrane while having a gap between the cap member and the membrane.