Accession Number : ADD014528

Title :   Block Patterning of the Metallization of Polyvinylidene Fluoride Transducers.

Descriptive Note : Patent Application, Filed 5 Jul 88,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Goo, Gee-In ; Waters, Thomas A

Report Date : 05 Jul 1988

Pagination or Media Count : 16

Abstract : There is disclosed herein a composite sheet used as a transducer for producing voltage in response to intercepted mechanical or thermal stimuli. The composite sheet comprises a sheet such as polyvinylidene fluoride (PVDF) having at least one of piezoelectric and pyroelectric properties sandwiched between a plurality of thin film conductive blocks arranged in block patterns to establish there between a network of sensors. The composite sheet may be used to wallpaper a room for securing it against intrusion. The composite sheet provides transducer output with improved frequency response over a similar sized transducer without the block patterning. Electric shorting between opposed blocks does not interfere with voltage production in other areas of the composite sheet. Patent applications. (jhd)

Descriptors :   *INTRUSION DETECTORS, *PATENT APPLICATIONS, *POLYVINYLIDENES, *PIEZOELECTRIC TRANSDUCERS, COMPOSITE MATERIALS, FREQUENCY RESPONSE, MECHANICAL PROPERTIES, NETWORKS, OUTPUT, PATTERNS, PRODUCTION, PYROELECTRICITY, RESPONSE, SHEETS, VOLTAGE

Subject Categories : Electromagnetic Shielding

Distribution Statement : APPROVED FOR PUBLIC RELEASE