A Constraint-Based Systems Approach To Line Yield Improvement

Abstract

This paper adopts a "systems thinking" approach, in confluence with "theory of constraints", to develop line yield improvement tools for semiconductor fabrication. Systems Thinking emphasizes the underlying structure driving line yield behavior, thus uncovering high leverage strategies for line yield. A Constraints approach helps to focus improvement efforts on those line yield problems having the most revenue impact. Thus, after identifying fundamental issues that contribute to line yield performance, this paper recommends key changes to management systems, structure, and policies, to achieve higher line yields in semiconductor fabrication.