COATINGS AND METHODS FOR INHIBITING TIN WHISKER GROWTH

摘要

An electrical component includes a conductive substrate (10), a tin layer (12) formed on the substrate, and a conformal coating (14) formed on the tin layer to impede tin whisker growth. The conformal coating includes a polymer matrix (15), and particles (16, 20, 26) that are dispersed about the matrix. The particles are either significantly harder than the polymer matrix, or are significantly softer than the polymer matrix.