TY - JOUR

T1 - In-operando fatigue behavior of gold metallization lines on polyimide substrate

AU - Glushko, Oleksandr

AU - Cordill, Megan J.

PY - 2020

Y1 - 2020

N2 - Although in-situ monitoring of electrical resistance of polymer-supported thin films during a mechanical test is frequently used, the impact of the magnitude of electric current on material behavior in such experiments remained unknown. Here, we report on cyclic straining of polymer-supported gold metallization lines under direct current of different magnitudes. Fatigue damage in form of localized extrusions becomes more pronounced with increasing current as a result of Joule heat and material softening. After a critical current value is reached, crack propagation results in a local decrease of line cross-section leading to thermal runaway and open circuit failure.

AB - Although in-situ monitoring of electrical resistance of polymer-supported thin films during a mechanical test is frequently used, the impact of the magnitude of electric current on material behavior in such experiments remained unknown. Here, we report on cyclic straining of polymer-supported gold metallization lines under direct current of different magnitudes. Fatigue damage in form of localized extrusions becomes more pronounced with increasing current as a result of Joule heat and material softening. After a critical current value is reached, crack propagation results in a local decrease of line cross-section leading to thermal runaway and open circuit failure.

U2 - 10.1016/j.scriptamat.2020.04.021

DO - 10.1016/j.scriptamat.2020.04.021

M3 - Article

VL - 186.2020

SP - 48

EP - 51

JO - Scripta materialia

JF - Scripta materialia

SN - 1359-6462

IS - September

ER -