Semiconductor device

A semiconductor device comprising:

• a memory cell arranged in each of rows and columns;
• a plurality of first word lines for a first port, arranged in the rows, respectively, and arranged in a first wiring layer;
• a plurality of second word lines for a second port, arranged in rows, respectively, and arranged in the first wiring layer;
• a plurality of first dummy word lines arranged in a second wiring layer which is different from the first wiring layer;
• a plurality of second dummy word lines arranged in the second wiring layer;
• a word line driver which drives the plurality of first word lines and the plurality of second word lines;
• and
• a dummy word line driver driving 1) one of the plurality of second dummy word lines corresponding to one of the plurality of second word lines which is adjacent to one of the plurality of first word lines, and 2) one of the plurality of first dummy word lines corresponding to the one of the plurality of first word lines which is adjacent to the one of the plurality of second word lines,
• wherein the dummy word line driver drives the one of the plurality of second dummy word lines in an opposite phase of the one of the plurality of first word lines, and drives the one of the plurality of first dummy word lines in an opposite phase of the one of the plurality of second word lines.