Patent ID: 11877395
Assignee: KURARAY CO., LTD.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H  B  C  G | IPC B  C  H

Claim 0:
1. A thermoplastic liquid crystal polymer film (or TLCP film) comprising a thermoplastic polymer capable of forming an optically anisotropic melt phase, wherein the TLCP film has a dielectric constant of from 2.5 to 3.2 in a thickness direction of the film at a temperature of 23° C. and a frequency of 20 GHz, and a heat deformation temperature of from 180 to 320° C., wherein the thickness direction of the film is perpendicular to planar directions of the film which are along a film plane of the film; wherein the TLCP film has dielectric constants in a relationship represented by the following formula (1):

0≤|(Dx+Dy)/2−Dz|≤0.9  (1)

wherein Dx denotes a dielectric constant in, among planar directions of the film, one direction of the film on a film plane, Dy denotes a dielectric constant in a direction perpendicular to the one direction of the film on the film plane, Dx and Dy being measured at a temperature of 23° C. and a frequency of 15 GHz, and Dz denotes a dielectric constant in the thickness direction of the film measured at a temperature of 23° C. and a frequency of 20 GHz.