US 10,888,897 B2
Transducer, transducer array, and method of making the same
Gerald T. Stranford, Albuquerque, NM (US); and Marshall Suarez, Albuquerque, NM (US)
Assigned to CTS Corporation, Lisle, IL (US)
Filed by CTS Corporation, Lisle, IL (US)
Filed on Oct. 26, 2017, as Appl. No. 15/794,557.
Claims priority of provisional application 62/413,865, filed on Oct. 27, 2016.
Prior Publication US 2018/0117631 A1, May 3, 2018
Int. Cl. B06B 1/06 (2006.01); H01L 41/047 (2006.01); H01L 41/09 (2006.01); H01L 41/338 (2013.01); H01L 27/20 (2006.01); H01L 41/312 (2013.01)
CPC B06B 1/0603 (2013.01) [H01L 27/20 (2013.01); H01L 41/0474 (2013.01); H01L 41/0926 (2013.01); H01L 41/0973 (2013.01); H01L 41/312 (2013.01); H01L 41/338 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A transducer comprising:
a transducer element including a plate defining a through-hole;
a piezoelectric bender including at least first and second wafer layers stacked together; and
a circumferentially extending collar positioned between the plate of the transducer element and the piezoelectric bender in a relationship with a first peripheral end face of the collar abutted against an exterior surface of one of the first and second wafer layers of the piezoelectric bender and a second opposed peripheral end face of the collar abutted against an exterior surface of the plate of the transducer element with the circumferentially extending collar surrounding the through-hole defined in the plate of the transducer element and the collar defining a closed interior cavity between the plate of the transducer element and the piezoelectric bender in communication with the through-hole defined in the plate of the transducer element;
whereby the first and/or second wafer layers are adapted to bend at a resonant frequency and generate ultrasonic waves flowing from the first and/or second wafer layers through the closed collar interior cavity and through the plate through-hole and create an in-air pressure pattern and in-air acoustic field at a location spaced from the transducer.