nOHM-a multi-process device synthesis tool for lateral DMOS structures

This paper presents a synthesis tool that generates layouts of Lateral Doubly-Diffused MOS (LDMOS) structures from electrical parameters of the device or from the current and thermal requirements of the package. Optionally, it generates layouts from physical parameters like DMOS width, area and floorplan constraints. Multiple layout and metal bus styles are supported. Source and drain sense DMOSs used to sample currents of the parent devices can also be generated and automatically placed inside the DMOS. The generated layouts are correct by construction. The tool has been developed for the Intelligent Power family of integrated circuits from Texas Instruments Inc. In this paper the need, capabilities and impact of the tool are presented along with the techniques used to achieve them