Patent ID: 8891222
Filing Date: 2014-11-18
Classification: G01D,H01G,H04R

Abstract:
1. A capacitive transducer comprising: a polymer film having a first surface and a second surface, a first electrically conductive layer arranged on the first surface of the polymer film, and a second electrically conductive layer arranged on the second surface of the polymer film, wherein the polymer film is at least partly made from a material having a molecular weight which is at least 21,000 g/mol, wherein the polymer film is a structure comprising at least two layers of polymer material, wherein at least a first of the layers of polymer material is made from a material having a molecular weight which is at least 21,000 g/mol, and at least a second of the layers of polymer material is made from a material having a molecular weight which is between 7,000 g/mol and 21,000 g/mol.