Patent ID: 6696712
Filing Date: 2004-02-24
Classification: H01L

Abstract:
A semicustom IC comprising:a plurality of basic cells disposed on a semiconductor substrate; a plurality of macrocells formed using said plurality of basic cells and a plurality of interconnection layers, wherein at least two macrocells of said plurality of macrocells are formed using particular basic cells of said plurality of basic cells and using at least one interconnection layer of said plurality of interconnection layers disposed over said particular basic cells; a first power supply line for supplying power to one macrocell of said at least two macrocells is formed around said one macrocell using an upper interconnection layer of said plurality of interconnection layers; a second power supply line for supplying power to another macrocell of said at least two macrocells is formed around said another macrocell using said upper interconnection layer of said plurality of interconnection layers; and the remaining macrocells of said plurality of macrocells are formed using basic cells located directly below at least one of said first power supply line and said second power supply line and also using a lower interconnection layer of said plurality of interconnection layers.