Patent ID: 7135747

Claim:
A high power, high frequency semiconductor device comprising: a plurality of unit cells connected in parallel, the unit cells each having a controlling electrode and first and second controlled electrodes; a first thermal spacer dividing at least one of the unit cells into a first active portion and a second active portion, spaced apart from the first portion by the first thermal spacer, the controlling electrode and the first and second controlled electrodes of the at least one unit cell extending across the first thermal spacer; a second thermal spacer that divides the at least one unit cell into a third active portion, the third active portion being spaced apart from the first and second active portions and the controlling electrode and the first and second controlled electrodes of the at least one unit cell extending across the second thermal spacer; and a third thermal spacer dividing an adjacent unit cell into a first active portion and a second active portion, the controlling electrode and the first and second controlled electrodes of the adjacent unit cell extend across the third thermal spacer and wherein the third thermal spacer is offset from the first and second thermal spacers along a direction parallel to the controlling electrode.