Investigation of triple track failures after coating with polyimide.
01 January 1987
Failures after curing of aluminum triple track test vehicles with polyimide or RTV overcoats were analyzed. A simple technique using carbon decoration was developed to pinpoint the location of open circuits in the metal meander. The results showed that room air curing of polyimide or RTV can result in corrosion of copper doped aluminum. Additives to the polyimide, such as copper benzoyl acetonate or chromium acetyl acetonate, can also result in aluminum corrosion if the additive is not completely dissolved.