Differential routing of MCMs-CIF: the ideal bifurcation medium

Recently published findings indicate that full differential routing of both VLSI chips and MCMs may be necessary to preserve noise margins in high performance systems. The optimal differential routing technique relies on routing signal pairs as logical nets and bifurcating the results to achieve a physical realization. Based on our research, CIF (Caltech. Interchange Format) has emerged as the ideal medium for the bifurcation process associated with differential routing of MCMs. Since MCMs have not as yet fully come of age, many of their design variables are under constrained. One of the greatest strengths of our finding is CIF's ability to handle the design uncertainty associated with current MCM system development, where both package and chip specification are typically in a tremendous state of flux throughout the engineering design cycle. >