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This paper propose the failure mechanism of power based multi layer nano thin film glass for automobiles is confirmed and an

accelerated life test method is suggested. Unlike conventional internal combustion engine cars, power-based cars use motors instead

of engines. Engine cars used engine heat for defrosting, but power-driven vehicles require the use of electrically heated glass to

perform the defrost function. Electric heating glass has been adopted as tungsten wire to prevent visibility problems. However,

domestic and foreign automakers develope multi-layer nano-thin films to defrost efficiently by applying Ag nanoparticles to glass. The

silver (Ag) used in the conductive layer is widely used as a material for heaters in the automotive industry because of its relatively high 

thermal and electrical conductivity. The multi layer nano thin film glass using silver (Ag) is a product of the domestic development

stage, and it is highly likely that recalls and claims will be raised due to problems with product defects while driving.