Patent ID: 8866291
Filing Date: 2014-10-21
Classification: H01L,H05K

Abstract:
1. A Monolithic Microwave Integrated Circuit (MMIC) chip, comprising: a semiconductor substrate; an active semiconductor device disposed in the substrate and having an electrical contact disposed on a front surface of the substrate; an electrical strip conductor disposed on the front surface of the substrate and electrically connected to the electrical contact of the active device; a ground plane conductor disposed on a back surface of the substrate, the strip conductor and the ground plane conductor providing a microstrip transmission line electrically connected to the electrical contact of the active device; a ground region conductor disposed on the front surface of the substrate and physically spaced from the microstrip transmission and the electrical contact sufficient to prevent the strip conductor and the ground region conductor from providing a coplanar waveguide (CPW) transmission line comprising the ground region conductor and the strip conductor; and a conductive via passing through the substrate electrically connecting the ground region conductor and the ground plane conductor.