Vibration plate liquid crystal polymer (LCP) film "SARAS"

basic information

In today's world, where the functionality of products is advancing, there is an increasing demand for high-performance acoustic devices that serve as interfaces with humans. In simple terms, the essence of sound is the vibration of air. The movement of air and changes in density are received as vibrations by the eardrum, converted into nerve signals, and transmitted to the brain, where they are recognized as "sound." The diaphragm, which is a key component of speakers, plays the role of radiating mechanical vibrations into space as acoustic signals, and it is required to have high Young's modulus, high internal loss, low density, and durability. To put it simply, materials that are lightweight and resistant to bending are considered good materials. As the conditions for diaphragms, which were predominantly made of paper, have become stricter, there has been a shift towards new materials beyond paper. In the current pursuit of an ideal material to replace paper, there is no new polymer material with superior acoustic properties that surpasses LCP, a super engineering plastic known for its excellent high-frequency electrical characteristics, as a speaker diaphragm material.

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Applications/Examples of results

Applications of diaphragm for headphones, earphones, speakers, and microphones.