Accession Number:

ADA636437

Title:

An Affordable, Two-Dimensional, High-Resolution Acoustic Imaging Array

Descriptive Note:

Technical memo.

Corporate Author:

NAVAL UNDERSEA WARFARE CENTER DIV NEWPORT RI

Report Date:

1997-08-01

Pagination or Media Count:

26.0

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.

Subject Categories:

  • Electrical and Electronic Equipment

Distribution Statement:

APPROVED FOR PUBLIC RELEASE