Patent ID: 8629495

Claim:
A field-effect transistor comprising: a source terminal; an electrically conductive substrate being electrically connected to the source terminal; a semiconductor body being provided on the conductive substrate and comprising a transistor structure; a gate line, and a drain line, wherein the transistor structure comprises a plurality of main current paths for a main transistor current, each respective one of the main current paths comprising a respective drain, a respective source, and a respective channel in between the respective drain and respective source, wherein the respective channel is controlled by a respective gate, wherein each respective drain is electrically connected to the drain line, wherein each respective source is electrically connected to the conductive substrate, wherein each respective gate is electrically connected to the gate line, wherein the semiconductor body embodies an RF-return current path to the source terminal, wherein the RF-return current path is for an RF-return current in an opposite direction than the main transistor current, wherein the sources of the plurality of main current paths are electrically connected by means of a strap line, wherein the strap line is disposed between the gate line and the drain line in a common metallization layer and inductively coupled to the gate line and the drain line to form an additional RF-return current path parallel to the RF-return current path in the semiconductor body, wherein the additional RF-return current path is for the RF-return current in the opposite direction than the main transistor current.