A Demountable Interconnect System for a 50 x 50 Ultrasonic

Greenstein, Michael ; Daane, Larry

HP Development Company

关键词: ultrasonic;    array;    interconnect;   

RP-ID  :  HPL-96-118

学科分类：计算机科学（综合）

美国|英语

来源: HP Labs

【 摘 要 】

A novel Pad Grid Array (PGA) system allows microminiature coaxial conductors to be electrically connected to a one-half wavelength, 50 x 50 element transducer array suitable for diagnostic ultrasound at 2.5 MHz. In order to achieve the desired one-half wavelength interconnection spacing present at the backing of the transducer module, an intermediary flexible printed circuit and other custom structures provide a transitional architecture between 42 AWG coax and in line interconnect pads at a 300 micron spacing. Due to critical alignment requirements, special processes are needed for fabrication and the successful connection of the fine-pitch circuit elements. A conductive anisotropic elastomeric material acts as the medium to effect the final interconnet between the PGA and transducer module. Because the anisotropic medium provides a separable interface, the interconnect system allows repeated connection. Acoustic performance indicates suitability for diagnostic imaging.