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Stability
Failure under Tensile Stress
·The crack propagates when the released energy (G) of
the film is larger than the surface energy () (Houchinson,
1992).
·Z is a fitting parameter (by experiment, Beuth, 1992),
which depends on elastic mismatch (Dundurs' parameter).
·=0, Z=1.976 (identical)
·=0.9, Z=8.48 (ITO on coating)
·=0.95, Z=13.24 (ITO on plastic sub.)

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