Text - KFUPM - King Fahd University of Petroleum and Minerals

ATE Channels (M)
M x N Decompression Network
Internal Scan Chains (N x L)
L
Figure 3.2: Block diagram of the decompression hardware and CUT with inputs
and outputs.
test set. Partitioning enables achieving high compression without requiring
’bloated’ test sets consisting of a very large number of test vectors with a very
few specified bits [93, 94].
2. Those scan vectors (labeled as bottleneck vectors) that limit achieving a desired
M are decomposed using an efficient relaxation-based test vector decomposition
technique [11] in an incremental manner so as to increase the
unspecified bits, resulting in better compression of the resulting relaxed vectors.
3. The technique is parameterized so that the tradeoff between the desired compression,
hardware costs and final test set size can be explored by obtaining a
number of solutions for a given input test set.
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