High dielectric constant polytetrafluoroethylene film and its preparation method and application

Abstract

The invention discloses a polytetrafluoroethylene film with a high dielectric constant and its preparation method and application. The polytetrafluoroethylene film with a high dielectric constant is put into raw materials and consists of polytetrafluoroethylene and functional materials. The functional material By (Ba 1‑x Sr x )TiO 3 and Ba(Ti 1‑y sn y )O 3 Composition, wherein, x=0.3-0.6, y=0.1-0.2. In the present invention, in order to modify the dielectric properties of polytetrafluoroethylene materials, two kinds of modified barium titanate ceramic fine powders are added as functional materials in polytetrafluoroethylene; , the dielectric constant of the polytetrafluoroethylene film of the present invention is adjustable between 2.3-80, and the dielectric loss is all lower than 1.0×10 ‑3 , which can meet the needs of different designs in the 5G communication field.

Description

technical field

[0001] The invention belongs to the technical field of 5G communication, and in particular relates to a polytetrafluoroethylene film with high dielectric constant and its preparation method and application. Background technique

[0002] The development trend of electronic information products and equipment is high frequency and miniaturization, and organic materials with high dielectric constant are conducive to the miniaturization and miniaturization of electronic devices.

[0003] Under high-frequency transmission, PTFE is the organic material with the best performance found so far. PTFE not only has good dielectric properties, but also has excellent high temperature resistance and natural V0 flame retardancy. However, PTFE materials also have limitations, such as the low dielectric constant of pure PTFE materials (about 2.4-2.9), which limits its wide application in high-frequency PCB boards in the 5G communication field.

[0004] In order to solve the a...