Recognition of Sensitized Longest Paths in Transition Delay Test

The progress of design and fabrication technologies has led to an increase in small delay failures in systems-on-a-chip. To evaluate the delay testing quality accurately, the authors have already proposed a statistical approach that calculates actual sensitized path lengths that detect small delay defects in the transition delay test. However, the calculation requires a huge amount of CPU time. This paper presents a much more efficient method to calculate the sensitized longest path lengths and experimental results regarding CPU time and accuracy. The experiments show that this calculation method has high speed and high accuracy