Patent ID: 6311096
Filing Date: 2001-10-30
Classification: G06Q

Abstract:
A method of improving process flow in fabrication process for fabrication of a device which comprises the steps of:(a) providing a model of the process flow as a sequence of process modules which is a sequence of contiguous process steps for providing a device falling within a predetermined window;(b) for a first said process module, determining the probability of the state of the device being fabricated being in any one of plural states as a result of a first fabrication process for maximizing the probability of said device being within said window;(c) for a second said process model, determining the probablitily of the state of the device being fabricated being in any one of plural states as a result of a second fabrication process and the result of said first fabrication process for maximizing the probability of said device being within said window; and(d) altering at least one of said first and second processes in response to results of fabrication of said device to further maximixe the probability that the device performance falls within said window.