VGAUA: The Variable Geometry Automated Universal Array Layout System

This paper presents the Variable Geometry Automated Universal Array (VGAUA) fully automatic physical layout program for gate array LSI which uses a single unique metalization pattern to personalize the array design. This fully automatic layout system minimizes the cost and time required for IC design and can be used over a range of array sizes from 800 to 3,500 gates. Each array size has its own unique, optimized, fixed geometry design for all levels except the programmable metalization level. The paper discusses both the topological design which makes the VGAUA program feasible and the software which makes the system automatic. The key to the success of the system is that the two items are heavily interrelated and highly interdependent.