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Electromigration Lifetime Calculator
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M
T
T
F
=
A
⋅
j
−
n
⋅
e
E
a
k
T
MTTF = A \cdot j^{-n} \cdot e^{\frac{E_a}{kT}}
MTTF
=
A
⋅
j
−
n
⋅
e
k
T
E
a
MTTF
= Mean Time To Failure (hours)
A
= Constant (relative unless calibrated)
j
= Current density (consistent units)
n
= Current density exponent (positive)
Ea
= Activation energy (eV)
T
= Temperature (K)
k
= Boltzmann constant = 8.617333262145e-5 eV/K
Material
Ea (eV)
n
Aluminum
0.5-0.7
1-2
Copper
0.7-1.0
1-2
Silver
~0.6
1-2
Current Density Unit
A/cm²
A/m²
MTTF (hrs)
Current Density (A/cm2)
Temperature (C)
Activation Energy (eV)
n (positive)
A (relative unless calibrated)
MTTF (hrs): 725.4242
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