MICROSTRIP LINE

PURPOSE:To improve the reliability of soldering on a microstrip line by coating a solder resist being a thermosetting paint of epoxy or acrylic group to a part in the vicinity of a location where electrinic components or leads are connected. CONSTITUTION:A microstrip line conductor 2 is formed on a dielectric board 1 and the solder resist 6 being a thermosetting paint of epoxy or acrylic group is coated very thinly in the vicinity of a soldering part. Thus, in soldering connecting pins of microwave components and leads 3 or the like to the soldered part, the solder resist 6 prevents solder 4 from being spread, minimizes the amount of solder and also prevents the microstrip line conductor 2 from being exfoliated from the dielectric board 1. Since the solder resist 6 is an electric insulator applied very thinly, he disturbance of the electromagnetic field due to the resist is less.