Patent ID: 6653915
Filing Date: 2003-11-25
Classification: H01P,H05K,Y10T

Abstract:
A coaxial transmission line having a termination to enable top side connection to the coaxial transmission line, comprising;a planar insulating substrate having a first conductor disposed thereon; a first dielectric layer disposed over the substrate and the first conductor, the first dielectric layer having two substantially parallel troughs provided therein to reveal end portions of the first conductor; a second conductor disposed on the first dielectric layer and centered between the two troughs; a second dielectric layer disposed on the first dielectric layer and the second conductor, the second dielectric layer having two substantially parallel troughs provided therein coincidental with the two substantially parallel troughs in the first dielectric layer, so as to reveal said end portions of the first conductor; a third conductor disposed on the second dielectric layer, as well as in the two substantially parallel troughs of the first dielectric layer and in the two substantially parallel troughs of the second dielectric layer so as to make physical and electrical contact with said revealed end portions of the first conductor to define peripheral conductors, and the third conductor to also lie above the second conductor, the third conductor having an opening provided therein to reveal a portion of the second dielectric layer; and a metal pad provided in said opening and arranged such that the metal pad does not contact the third conductor, said metal pad having a conductive via provided therein, said conductive via extending through the second dielectric layer to reveal a portion of the second conductor and providing electrical connection between the metal pad and the second conductor, wherein the third conductor includes two substantially parallel troughs situated within the peripheral conductors and along the two substantially parallel troughs of the second dielectric layer.