Patent ID: 6611950
Filing Date: 2003-08-26
Classification: G06F,H01L

Abstract:
A semiconductor device formed by combining and placing previously registered functional blocks, and determining a wiring pattern in accordance with given logical circuit specifications, said semiconductor device comprising:a first functional block including at least one of: a first conduction type diode having a first conduction type diffusion layer connected to an input pin of the first functional block and a second conduction type well connected to a second power supply, and, a second conduction type diode having a second conduction type diffusion layer connected to the input pin and a first conduction type well connected to a first power supply; and a second functional block including the same logic and the same drive capability as the first functional block but not containing said first or second conduction type diode, wherein either the first functional block or the second functional block is selectively used depending on whether or not a wiring conductor conducting to the input pin and a gate electrode becomes an antenna ratio exceeding an allowed antenna ratio in said semiconductor device when the antenna ratio is a ratio between an area of the wiring conductor conducting to the gate electrode and an area of the gate electrode.