Patent ID: 7727156

Claim:
An ultrasound transducer array probe for transmission from a front of the probe of ultrasound pulses in separate low frequency (LF) and high frequency (HF) bands and reception of pulses in at least the HF band, the transducer comprising: radiation surfaces for the LF band and the HF band, wherein at least a portion of said radiation surfaces for the LF and HF bands are common in a common radiation surface, at least in a region of the common radiation surface, a stack of layers stacked in a thickness direction substantially normal to the common radiation surface, said stack including separate LF and HF piezoelectric layers configured for respective LF and HF electro acoustic transductions, wherein said HF piezoelectric layer is disposed closer to the common radiation surface than is said LF piezoelectric layer, and an acoustic isolation section composed of at least two acoustic layers stacked in the thickness direction and disposed between said HF and LF piezoelectric layers.