SfW method: Delay test generation for simple chain wrapper architecture

The aim of the presented work is to improve the quality of testing of SoC digital cores surrounded with test wrappers. The paper presents a new effective delay fault test generation method for the transition faults based on the skewed-load test. The generated delay fault test can be applied to a SoC core through a test wrapper architecture with only a simple boundary scan chain. This eliminates the necessity to use an enhanced boundary scan chain for the application of the delay fault test. The effectiveness of the developed method for a transition delay test generation was verified on the set of combinational and sequential circuits. The experiments show a significant reduction of test vector application time.