| 摘要 |
<p>PURPOSE:To reduce clock skew and to prevent malfunction of a circuit caused by it by a method wherein, when a clock bus supplying a clock signal to a circuit block via a clock driver is provided, a thickness of the clock bus is made about twice the thickness of other signal wiring parts of more. CONSTITUTION:In a semiconductor integrated circuit provided with a clock bus D which supplies a clock signal to circuit blocks B via a clock driver A, the clock bus D has a thickness which is twice that of signal wiring parts supplying other signals. Also a size of through holes is made twice a size of through holes of other signal lines. When the thickness of the clock bus is made about twice or higher, a resistance R is made about a half and a capacity C is made about twice or more; since a reduction in the resistance R becomes effective, a clock skew is reduced sharply; it is possible to prevent malfunction of a circuit.</p> |
