Patent ID: 7400222
Filing Date: 2008-07-15
Classification: H01P,H05K

Abstract:
1. A coaxial transmission line, comprising: a main groove provided on a substrate; a first ground layer provided on a surface of the groove and a flat surface of the substrate; an anisotropic conductive film placed at a position above the groove and on a part of the first ground layer located on the flat surface of the substrate; a second ground layer provided on the anisotropic conductive film at a position corresponding to the part of the first ground layer located on the flat surface of the substrate; a dielectric film provided at a position above the groove and on the second ground layer, the dielectric film having an upper surface and a lower surface; a third ground layer provided on the upper surface of the dielectric film; and a signal line attached to the lower surface of the dielectric film to be placed in a space defined by the groove.