Ultrasonic sensor for sensing area around motor vehicle has housing, membrane, membrane holder, with membrane surface facing outside of housing carries highly polished chromium coating

摘要

The sensor has a housing (4), a membrane (6), a membrane holder (8) for holding the membrane inside the housing, whereby the membrane is facing the outside of the housing and the surface of the membrane facing outwards carries a coating of chromium (10). The chromium coating is highly polished. A bearer element (12) connects the membrane holder to the housing. An independent claim is also included for a body part of a motor vehicle.