demountable interconnect system for a 50 x 50 ultrasonic imaging transducer array
By: Larry Daane, Michael Greenstein.
Contributors: Greenstein, Michael.; Hewlett-Packard Laboratories.
Series: HP Laboratories technical report -- HPL-96-118.
Publisher: Hewlett-Packard Laboratories, Technical Publications Dept.
Published: 1996
Place of publication: Palo Alto, Calif
Language: eng
Number of pages: 12
Subjects: Ultrasonics in medicine; Ultrasonic imaging
Description: Abstract: "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 interconnect between the PGA and transducer module.  Because the anisotropic medium provides a separable interface, the inteconnect system allows repeated connection.  Acoustic performance indicates suitability for diagnostic imaging."
Notes: "August, 1996."

Includes bibliographical references.