Grenzflächenwiderstand

Grenzflächenwiderstand, often translated as interfacial resistance or contact resistance, refers to the resistance to electrical current flow that occurs at the interface between two dissimilar materials. This resistance arises from various factors, including the presence of surface contaminants, oxide layers, poor surface finish, or differences in the electronic properties of the materials themselves. When two conductors are brought into contact, the actual area of physical contact is typically much smaller than the apparent contact area. The current then has to squeeze through these small contact points, leading to an increased resistance. This effect is particularly significant in electrical contacts, semiconductor devices, and any application where conductive materials are joined. Minimizing grenzflächenwiderstand is crucial for efficient electrical energy transfer and reliable performance of electronic components. Techniques to reduce it include surface cleaning, plating, applying conductive pastes, and ensuring adequate mechanical pressure at the interface. Understanding and controlling grenzflächenwiderstand is therefore an important aspect of electrical engineering and materials science.