TUNABLE DIELECTRIC COMPOSITE AND METHOD FOR THE PRODUCTION THEREOF

文件类型：PDF文档
文件大小：338K
The present invention relates to composite dielectric materials with low dielectric losses and high tunability of the relative dielectric permittivity, in the form of thick films to be used and integrated in circuits, as passive components of tunable devices, for application at radio and microwave frequencies, and methods for the production thereof, specifically with the combination of the electrophoretic deposition method with the sol gel method for manufacturing said thick composite films, composed of a dielectric phase with low dielectric losses (high Q), such as the rare earth barium titanates BaO-Re2O3-TiO2 (Re = Nd, Sm, La, in particular), the neodymium titanate (BaNd2Ti5O14, BNT), and of a dielectric phase with a tunable dielectric permittivity that is tunable by the electric field, as components of the solid solution between barium titanate and strontium titanate BaTiO3 - SrTiO3, such as (Ba0.5 Sr0.5) TiO3 (BST), in particular.