An Affordable, Two-Dimensional, High-Resolution Acoustic Imaging Array
Abstract
The design, fabrication, and measured results for a prototype, two-dimensional, ultrasonic imaging array are described. The active sensor consists of virtually three layers: (1) a piezoelectric 1-3 composite layer, (2) a flex-circuit component, and (3) a special adhesive that joins them. The sensor construction utilizes electroplated, injection-molded 1-3 piezocomposite as the active layer. Four multi-layer, acoustically thin flex-circuits provide the electrical connections required for addressing the 468 individual array elements. Of key importance to the fabrication process is the use of a composite, B-stage, adhesive film layer that combines both conductive and non-conductive regions in a pattern-specific orientation within the plane comprising the bond line interface. The conductive regions of the adhesive film are registered with respect to the electroplated sections on both the flex-circuit and the 1-3 piezocomposite substrate. The transducer array is a reciprocal device operable in both transmit and receive modes. Measured results include individual element and array calibrations (i.e., receive responses, beam patterns, and relative phase).
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 01, 1997
- Accession Number
- ADA636437
Entities
People
- Fred Nussbaum
- Gerald T. Stevens
- James M. Powers
- Kim C. Benjamin
Organizations
- Naval Undersea Warfare Center