A 2.5 MHz 2D array with Z-axis backing
- 24 December 2002
- proceedings article
- Published by Institute of Electrical and Electronics Engineers (IEEE)
- Vol. 2, 1513-1516
- https://doi.org/10.1109/ultsym.1996.584368
Abstract
The design, fabrication and initial characterization of a prototype fully lambda/2 sampled, 2.5 MHz, 50 x 50 element 20 array for cardiac medical imaging applications is presented. The array utilizes a novel Z-axis electrically conductive backing layer to provide both appropriate acoustic attenuation, and an anisotropic electrical interconnect for the individual acoustic elements in the 20 array. A modular, demountable Pad Grid Array (PGA) interconnect is used to connect to the backing. The PGA is capa ble of terminating the full 2500 element array at a spatial pitch of 300 microns. Measurements are presented on the electrical impedance, directivity and cross talk of the 20 array module, as well as the pulse echo properties of the 20 array elements excited through the Pad Grid Array interconnect system. The single element directivity is measured to be 35 degrees, while the nearest neighbor electrical cross talk is measured at -42 dB. The pulse echo waveform has a fractional bandwidth of 50010.Keywords
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