Patent ID: 8115234
Filing Date: 2012-02-14
Classification: H01L,H04B

Abstract:
1. A semiconductor device comprising a field effect transistor formed over a semiconductor substrate, the field effect transistor having: (a) a first ohmic electrode and a second ohmic electrode which extend in a first direction of the semiconductor substrate and are disposed to face each other; (b) a plurality of first comb-like electrodes which project in a second direction intersecting the first direction from a counter surface, facing the second ohmic electrode, of the first ohmic electrode; (c) a plurality of second comb-like electrodes which project in the second direction intersecting the first direction from the counter surface, facing the first ohmic electrode, of the second ohmic electrode; and (d) a gate electrode which extends along a space formed between the first comb-like electrodes and the second comb-like electrodes by disposing the first comb-like electrodes and the second comb-like electrodes alternately in comb shape, wherein a length of a comb-like electrode closest to an input side where a control signal is inputted to the gate electrode, of comb-like electrodes including the first comb-like electrodes and the second comb-like electrodes is made greater than the lengths of the other comb-like electrodes.