Patent ID: 6066246
Filing Date: 2000-05-23
Classification: H01P

Abstract:
The method of fabricating a metallic microwave signal conductor element of an integrated circuit device transmission line comprising the steps of:forming a rectangular cross-sectioned metallic signal conductor member on a dielectric material layer of said integrated circuit device using one of a photo-lithographic process, a metal evaporation process, and an electroplating process, said rectangular cross-sectioned metallic signal conductor member having exposed top and side surface portions;covering a widthwise central portion of said rectangular cross-sectioned metallic signal conductor member top surface with a thick layer of photoresist material, said thick layer extending widthwise over said top surface up to an exposed metal cross-sectional corner region joining a side portion with said top surface portion of said metallic signal conductor member and and extending also over a substantial lengthwise extent of said metallic signal conductor member;increasing a total surface area size of said metallic signal conductor member by electroplating to cover said exposed metal cross-sectional corner region with a thick and bulbous cross-section-shaped mass of electroplating metal, metal extending also over a substantial lengthwise extent of said metallic signal conductor member;removing said thick layer of photoresist material to leave a signal conductor member element with increased skin effect surface area and decreased microwave electrical impedance.