ULTRASONIC SENSOR,申请号US20060066089-传众专利搜索

ULTRASONIC SENSOR

申请公布号：US2009302712(A1)

申请号：US20060066089

申请日期：2006.08.29

申请公布日期：2009.12.10

申请人：

MURATA MANUFACTURING CO., LTD.

发明人：OTA JUNSHI

分类号：H01L41/08

主分类号：H01L41/08

摘要：A case member of an ultrasonic sensor includes an outer case member having a substantially cylindrical shape with a bottom surface and an inner case member. Cutout portions having a predetermined size are arranged so as to face each other in a lower portion of a sidewall of the inner case member. The inner case member is made of a metal material having a density that is greater than that of the outer case member. Consequently, an elliptical vibrating-surface amplitude profile can be formed in a vibrating surface of the ultrasonic sensor, and an ultrasonic sensor having stable anisotropy in directional properties can be provided. Further, the ultrasonic sensor has a small amount of displacement of side vibration.