Patent ID: 6541340
Filing Date: 2003-04-01
Classification: H01L,H01P

Abstract:
A method for manufacturing a semiconductor device having a semiconductor substrate, a circuit device formed on said semiconductor substrate, an insulating film covering said circuit device, and a microstrip line coupled to said circuit device formed on said insulating film, comprising:(a) forming a concave trench on said semiconductor substrate, said concave trench having a predetermined shape; (b) forming said insulating film on said semiconductor substrate so that said insulating film has an approximately uniform thickness in all portions thereof to maintain the shape of said concave trench; and (c) forming said microstrip line on said insulating film in said concave trench, step (c) including (c-1) forming an elongated lower conductive layer in said trench, (c-2) forming an interlayer dielectric layer over the lower conductive layer, (c-3) forming a contact hole reaching said lower conductive layer in said interlayer dielectric, and (c-4) forming an elongated upper conductive layer over said trench, said upper conductive layer contacting said lower conductive layer through said contact hole.