Anti-corrosion conformal coating comprising modified porous silica fillers for metal conductors electrically connecting an electronic component

摘要

A conformal coating comprising modified porous silica particles is disclosed. A porous silica particle, such as MCM-14 or SBA-15 is modified with a sulfur gettering functionality, such as a phosphine compound, covalently bonded to silicon atoms in the porous silica particle. The conformal coating comprising the modified porous silica particles may be applied to metallic wiring areas of a circuit component, with the sulfur gettering functionality preventing sulfur from atmospheric gasses from penetrating the conformal coating to the metallic wiring.

主权项

1. An apparatus, comprising:
a substrate; an electronic component mounted on the substrate; metal electrical conductors; and a conformal coating covering the metal electrical conductors, wherein the conformal coating comprises a plurality of modified porous silica filler particles having a surface area of approximately 1000 square meters/gram with a gettering functionality covalently bonded to silicon atoms in the porous silica filler particles.