In this paper we present a fault diagnosis procedure for defects in the scan clock tree. We first identify the candidate clock tree buffers common to failing chains by backtracing. We then evaluate and rank these candidates by forward tracing and simulation. Experimental results show that the proposed procedure provides accurate diagnosis of scan clock failures.
Index Terms:
diagnosis, scan clock, scan chain
Citation:
King Leong Lee, Nadir Z. Basturkmen, Srikanth Venkataraman, "Diagnosis of Scan Clock Failures," vts, pp.67-72, 26th IEEE VLSI Test Symposium (vts 2008), 2008