Patent ID: 8482354
Filing Date: 2013-07-09
Classification: H01L

Abstract:
1. A power amplifying device comprising: a drain electrode which is provided on a substrate; a plurality of drain fingers which is connected to the drain electrode and which have front ends branched in a comb shape; a gate electrode which faces the drain electrode and which is provided on the substrate; a plurality of gate fingers which is connected to the gate electrode and which is arranged on both sides of each of the drain fingers; source electrodes which are arranged in parallel outside the gate fingers; source electrode earth conductors which are connected to respective of the source electrodes which are arranged outside the gate fingers arranged at both ends of the gate electrode, and which are arranged in parallel to the source electrodes; a pair of earth parts which is connected to both ends of the source electrode earth conductor and which is connected with via holes for grounding; an inner source electrode of the source electrodes which is arranged between a pair of the source electrode earth conductors; and an air bridge which is disposed diagonally in relation to a longitudinal direction of the inner source electrode and directly connects the inner source electrode and the earth parts at a shortest distance.