Patent ID: 7122886

Claim:
A semiconductor module comprising: a board provided with electric wirings including a input signal line and a output signal line; and a plurality of semiconductor devices mounted on the board, the plurality of semiconductor devices being arranged in a line in a longitudinal direction of the board and the plurality of semiconductor devices being connected in parallel with each other between the input signal line and the output signal line, the input signal line being electrically and mechanically connected to each of the semiconductor devices mounted on the board, and the output signal line being electrically and mechanically connected to each of the semiconductor devices, and a sum of a first line length of the input signal line and a second line length of the output signal line for each of the semiconductor devices being set to a substantially fixed length, the semiconductor module further comprising: a termination resistance board; input-side termination resistance connecting means, and an output-side termination resistance connecting means, the termination resistance board being provided with an input-side termination resistance terminal and an output-side termination resistance terminal; and the input-side termination resistance terminal being connected to an input-side termination terminal of the input signal line via the input-side termination resistance connecting means, and the output-side termination resistance terminal being connected to an output-side termination terminal of the output signal line via the output-side termination resistance connecting means.