A coaxial shield for a semiconductor chip includes: a top vertical shield wire
formed in a top metal layer of a semiconductor chip wherein the top vertical shield
wire has a selected length for providing a coaxial shield; a first side shield
wire formed in an intermediate metal layer of the semiconductor chip; a first upper
via formed in a first dielectric layer of the semiconductor chip that extends lengthwise
parallel to the first side shield wire to electrically connect the first side shield
wire to the top vertical shield wire along the selected length; a second side shield
wire formed in the intermediate metal layer of the semiconductor chip having a
length corresponding to the selected length wherein the second side shield wire
extends lengthwise parallel to the first side shield wire; and a second upper via
formed in the first dielectric layer that extends lengthwise parallel to the second
side shield wire to electrically connect the second side shield wire to the top
vertical shield wire along the length corresponding to the selected length.