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ELECTRONIC DEVICE FAILURE ANALYSIS | VOLUME 18 NO. 3
pattern based on the failure signature. A configuration file
is then generatedout of theUI and transferred to the tester
to execute the process. There are three selectionpanels on
theGUI for user inputs. The tester platformdetermines the
format of the configuration file. Fundamentally, there are
two steps involved in manipulating the compare vectors
in the original pattern. First, the usermay choosewhether
to invert all or partially invert the compare fail cycles
according to the failing signature. The last option is to
execute no vector inversion. In the second step, the mask
select option enables the user tomask out the remaining
compare fail vectors (within the reference failed vectors
but not inverted in the first step), the remaining compare
vectors (not a part of the reference failed vectors), or not
mask anything.
Fig. 6
EeLADA software implementation graphical user
interface
Fig. 7
Variations of technical test pattern
Fig. 8
(a) Most-stringent and (b) least-stringent technical test patterns
(a)
(b)