Patent ID: 8466535

Claim:
A semiconductor-structure comprising: a substrate structure having a bottom surface, a non-conductive top surface, and a first cavity in the non-conductive surface, the first cavity having a bottom surface and a side wall surface that extends from the bottom surface of the first cavity to the top surface of the substrate structure, wherein the first cavity exposes only non-conductive regions of the substrate structure; a conductive signal line, touching the top surface of the substrate structure, and extending completely across the first cavity creating a gap that lies between the signal line and the bottom surface of the cavity, wherein the signal line has a plurality of widths, also wherein a minimum width of the signal line lies over the first cavity in the substrate structure; a non-conductive structure having a bottom surface, a top surface, and a second cavity in the bottom surface of the non-conductive structure, the bottom surface of the non-conductive structure touching the signal line and the top surface of the substrate structure, the second cavity in the non-conductive structure having a top surface and a side wall surface that extends from the top surface of the cavity in the non-conductive structure to the bottom surface of the non-conductive structure; wherein a gap lies between the signal line and the top surface of the second cavity in the non-conductive structure; wherein the second cavity in the non-conductive structure lies over the first cavity in the substrate structure; wherein the conductive signal line has a galvanic end and a circuit end; and wherein the cavity in the substrate structure lies between and spaced apart from the galvanic end and the circuit end of the signal line.