DIAPHRAGM FOR ELECTROACOUSTIC TRANSDUCER, ELECTROACOUSTIC TRANSDUCER USING SAME, AND ELECTRONIC EQUIPMENT AND DEVICE USING SAME ELECTROACOUSTIC TRANSDUCE

摘要

PROBLEM TO BE SOLVED: To realize a diaphragm for an electroacoustic transducer used for acoustic equipment, the diaphragm being characterized in that while durability and heat resistance of the diaphragm are maintained, sound characteristics are improved by making internal loss large and drawing is easily performed at low temperature. SOLUTION: The diaphragm for the electroacoustic transducer is obtained by drawing an aromatic polyimide film which uses a specific carboxylic acid component (mainly, carboxylic anhydride) and a specific diamine component, the carboxylic acid component being a compound obtained by ether bonding of a benzene ring like ODPA and the diamine component being diamine diphenyl ethers. COPYRIGHT: (C)2006,JPO&NCIPI