METAL LINE LAYOUT METHOD

摘要

A metal line lay-out method is provided to decrease the coupling capacitances by securing the distance between the dummy metal line and the metal line transmitting the sensitive critical signal. Power lines(10,12) are separated from each other and are arranged parallel. One or more first metal line(20) is parallel arranged between the power lines. The both sides of the second metal line(30) is arranged adjacent to the power line or the first metal line. A dummy metal line(40) is arranged between the first metal lines. The first signal transmitted through the first metal line is less sensitive to the influence of capacitance than the second signal transmitted through the second metal line.