Patent ID: 6977430

Claim:
A transistor module on a substrate, the transistor module comprising: a first transistor; a first recovery diode; a second transistor; and a second recovery diode, wherein a first transistor chip associated with the first transistor and a second diode chip associated with the second recovery diode are disposed adjacently on a positive potential area, the first transistor chip and the second diode chip being disposed on an output potential area, wherein a second transistor chip associated with the second transistor and a first diode chip associated with the first recovery diode are adjacently disposed on the output potential area, wherein at least two sides of the output potential area are adjacent to a negative potential area, wherein both the second transistor chip and the first diode chip are connected to the negative potential area, and wherein one of the first and second transistor chips is disposed adjacent to one of the second and first diode chips on a same potential area and the one of the first and second transistor chips is also disposed opposite another one of the first and second diode chips located on a different potential area.