Patent ID: 6643828
Filing Date: 2003-11-04
Classification: G06F

Abstract:
A method of modifying selected predetermined circuits in the design of a very large scale integrated circuit chip having a large plurality of circuits and wherein the chip is designed using circuits from at least one library of predetermined circuits that can be incorporated into the chip, said method comprising:enabling limited modifications to the selected predetermined circuit to alter its characteristics in a controlled manner by altering the physical implementation of the circuit components on the silicon of the chip having the circuit, including one or more of selectively changing the wire widths and lengths between transistors, selectively changing the number of vias and contacts that are provided in the circuit, selectively changing the widths and lengths of the transistors while maintaining minimum aspect ratios between the width and length of each transistor, selectively changing the distances between transistors in the circuit; and, verifying the operational performance of the modified circuit using a detailed circuit simulator.