And the ultrasonic probe including an acoustic stack, the acoustic stack, a method of forming an aligned layer structure of the ultrasonic probe for acoustic stack

摘要

PROBLEM TO BE SOLVED: To provide a multi-layered impedance matching structure, for an ultrasound probe, with thin matching layer sections and small attenuation.;SOLUTION: An acoustic stack (270) for an ultrasound probe (106) comprises a piezoelectric layer (272) having top and bottom sides and a plurality of matching layer sections (222, 224, 226, 228, 230) forming a matching layer structure (220). Each of the matching layer sections (222, 230) comprises a spring layer (234, 236, 238, 240, 242) comprising a first material and a mass layer (244, 246, 248, 250, 252) comprising a second material that is different from the first material. The spring layer (234) within the matching layer section (222) that is positioned closest to the piezoelectric layer (272) is thinner than the spring layer (236-242) within the other matching layer sections (224-230).;COPYRIGHT: (C)2010,JPO&INPIT