LAYOUT STRUCTURE OF SEMICONDUCTOR INTEGRATED CIRCUIT

摘要

PURPOSE: To improve noise resistance and surge resistance in a semiconductor integrated circuit that integrally includes an analogue circuit and a digital circuit as well as an RC filter against electromagnetic wave noise. CONSTITUTION: A semiconductor integrated circuit integrally includes an RC filter against electromagnetic wave noise as well as an analogue circuit and a digital circuit on the same substrate. The circuit has a layout in which a positive electrode 11 of a capacitor 1 constituting the RC filter is made distant from elements and wiring 2 constituting the analogue circuit and the digital circuit to such an extent that malfunction of a circuit element is not caused by noise superimposed on the positive electrode 11, or that dielectric breakdown of the capacitor 1 of the RC filter or latch-up or dielectric breakdown of a circuit element is not caused by a surge applied to the positive electrode 11. Specifically, a gap between the positive electrode 11 of the RC filter and circuit elements and wiring 2 is made equal to the minimum gap of an layout rule or greater or five times of the minimum gap of the layout rule including a safe margin.