Patent ID: 7755112

Claim:
A field effect transistor comprising: a channel region fabricated on a compound semiconductor substrate; a gate electrode fabricated across a surface of the channel region; a source electrode and a drain electrode alternately arranged on the channel region with a gate electrode interposed between the source electrode and the drain electrode; a bonding pad to be connected with an external circuit; and an air-bridge connected with the bonding pad, the air-bridge including an electrode contact terminal to be connected with the source electrode or the drain electrode and to be arranged along a longer direction of the source electrode or the drain electrode, a pad contact terminal connected with the bonding pad, and an aerial circuit line for connecting the electrode contact terminal with the pad contact terminal, wherein a cross sectional area of the electrode contact terminal in a direction perpendicular to a connecting direction of the pad contact terminal, the aerial circuit line, and the electrode contact terminal is equal to or less than a cross-sectional area of the aerial circuit line.