Integrated circuit device and method for forming the same

An integrated circuit device having a circuit portion including a plurality of electronic elements, the circuit portion being formed of a plurality of cells, the device comprising:

• a plurality of first element voltage supply lines connected to a higher potential terminal of each of the plurality of the cells;
• a plurality of second element voltage supply lines connected to a lower potential terminal of each of the plurality of the cells;
• a first trunk voltage supply line connected to each of the plurality of first element voltage supply lines;
• a second trunk voltage supply line connected to each of the plurality of second element voltage supply lines;
• a first branch voltage supply line connected to the first trunk voltage supply line to supply a voltage from the outside to the first trunk voltage supply line;
• a second branch voltage supply line connected to the second trunk voltage supply line to supply a voltage from the outside to the second trunk voltage supply line;
• a first wiring layer provided above the plurality of the cells to have the first and second element voltage supply lines and the first and second trunk voltage supply lines placed therein;
• and
• at least one upper wiring layer provided above the first wiring layer to have the first and second branch voltage supply lines placed therein.