Patent ID: 6535090
Filing Date: 2003-03-18
Classification: H01L,H01P

Abstract:
A high-frequency circuit device having a multilayer circuit, the multilayer circuit comprising:a first conductor for transmitting a signal, the first conductor having a length along a longitudinal direction and a width transverse to the longitudinal direction; first dielectric layer inserting said first conductor is embedded; a first ground conductor layer located on a first surface of said first dielectric layer and having a first opening; a second ground conductor layer on a second surface of said first dielectric layer and having a second opening, the first and second openings of said first and second ground conductor layers being mutually opposite each other on the first and second surfaces of said first dielectric layer; two second dielectric layers, a first of said second dielectric layers being located on a surface of said first ground conductor layer and a second of said second dielectric layers being located on a surface of said second ground conductor layer; and a pair of second conductors for transferring the signal transmitted in the first conductor, a first of said second conductors having a longitudinal direction substantially parallel to the longitudinal direction of the first conductor and a width, and being located on a surface of the first of said second dielectric layers, and a second of said second conductors having a longitudinal direction substantially parallel to the longitudinal direction of the first conductor and a width, and being located on a surface of the second of said second dielectric layers, portions of said second conductors being mutually opposed at the first and second openings, wherein the first and second openings have respective rectangular shapes with longer and shorter sides, the shorter sides being parallel to the longitudinal direction of the first conductor and shorter than the widths of each of the first and second conductors, and the longer sides are not more than three times longer than the widths of each of the first and second conductors.