A semiconductor device includes an interlayer insulating film INS2, adjacent Cu wirings M1W formed in the interlayer insulating film INS2, and an insulating barrier film BR1 which is in contact with a surface of the interlayer insulating film INS2 and surfaces of the Cu wirings M1W and covers the interlayer insulating film INS2 and the Cu wirings M1W. In particular, after each conference participant gains access to the personal conference bridge, the conference information is delivered to a terminal of the conference participant. The transition layer is grown on the first semiconductor layer, contains a first nitride compound semiconductor material, and has at least a texture, wherein the texture has at least a first protrusion with at least an inclined facet, at least a first trench with at least an inclined facet and at least a shoulder facet connected between the inclined facets.