Patent ID: 6379809
Filing Date: 2002-04-30
Classification: H01L,Y10S,Y10T

Abstract:
A thermally stable, oriented, piezoelectric and pyroelectric polymeric substrate comprising:(a) a polymeric member having a softening temperature greater than about 100Â° C. wherein said member is an anisotropic polymer containing polarizable moieties; and (b) a metal electrode material deposited onto the polymeric member to form a metal electrode coated polymeric substrate wherein a polar field is applied to the metal electrode coated polymeric substrate; wherein said substrate remains stable at temperatures above about 100Â° C. up to about the softening temperature of the polymeric member; wherein said polymeric member comprises a polymer selected from the group consisting of: a polyarylate; a polyphenylene ether; a polycarbonate; a polyphenylene sulfide; a polysulfone; a polyaryletherketone; a polyimide; a polyazomethine; a polyquinoxaline; a polybenzimidazole; and a polyarylene ether; further wherein said polymeric member comprises the repeat unit: â€ƒwherein R is selected from the group consisting of: Arâ€² is selected from the group consisting of: any aromatic moiety and any aromatic moiety having a polarizable group; Ar is: â€ƒwherein the catenation is ortho, para, or meta; Z is a hydrogen or Qâ€”Y; Q is a direct bond or any aromatic moiety; Y is selected from the group consisting of: â€”CF3, â€”CN, â€”NO2, and â€”SF5; X is selected from the group consisting of â€”Oâ€”, â€”COâ€”, â€”SO2â€”, and â€”CH2â€”; and n is an integer ranging from about 1 to about 10.