In this paper, the authors discuss the design of an Integrated Circuit (IC) layout for a decoder. The layout was designed by using an open source software namely electric VLSI design system as the Electronic Design Automation (EDA) tool. In order to produce the layout, the basic knowledge of fabrication process and IC design rules are expounded. The complete layout of the decoder was designed based on its schematic circuit, which consists of NOT gates, 2-input NAND gates, 3-input NAND gates, 4-input NAND gates, 2-input AND gates and 3-input AND gates.