High-frequency semiconductor device

摘要

The invention relates to a high-frequency semiconductor device comprising a ceramic substrate (2); an element group (1a,1b,1c) including semiconductor elements and passive components mounted onto a bottom portion of the ceramic substrate (2); and a composite resin material layer formed on the bottom portion of the ceramic substrate so as to bury the element group; wherein the composite resin material layer(10) is formed by a composite resin material including an epoxy resin and an inorganic filler material, and the composite resin material layer has a flat bottom surface on which electrodes (4) for connecting to the outside are formed.