Enhancing the contact interface by matching the surface pressure and current density distribution

摘要

This article focuses on the differences in how the contact interface surface normal load and Current Density (J) are distributed across a 'Hertzian style' electrical contact interface. Structuring the contact interface in a way that the a-spots carrying the greatest load coincide with the outer perimeter contact a-spots with the greatest current density will lead to lower Contact Resistance (RC) Sn contacts. This effect is not as pronounced with more noble finishes.