To provide a composite dielectric having not only excellent dielectric characteristics in a high-frequency region but also characteristics of high heat resistance and low water absorption, and being easily formed into a thin substrate; and to provide a composite dielectric sheet, a wiring board and a multilayer wiring board.
The composite dielectric contains an aromatic liquid crystalline polyester, and a dielectric ceramic powder compounded in the aromatic liquid crystalline polyester, and has >650 Q-value at 1 GHz by a vibration method. The wiring board having the composite dielectric sheet comprising the composite dielectric having the characteristics has a small transmission loss because of a high dielectric constant and a low dielectric loss tangent, and is suitably usable for electronic equipment driven in the high-frequency region.
MORITA TAKAAKI
Shiro Terasaki
Toyotaka Abe