Is DFT right for you?

摘要

In the past 10 years or more several papers have been published to evaluate what economical cost is associated with adding "Design For Test" techniques to a design. Is Cost the only factor that needs to be examined to make a decision on adding ornot adding DFT to your chip? The objective of this paper is to describe the main criteria and trade-offs of adding DFT to a design and models to help justify the overall cost impact from design to volume production. This paper will give a description ofthe models used and the results obtained.The objective to developing the Motorola DFT analysis model is to take all major criteria into consideration in addition to cost to decide if DFT should be implemented. The model will use both scan based testing for logic and (Built In Self Test) BIST for memories as its main DFT techniques.