US Patent 10186382 Solid electrolytic capacitor with improved leakage current

A capacitor assembly that is capable of exhibiting good electrical properties even under a variety of conditions is provided. More particularly, the capacitor contains a capacitor element that includes a sintered porous anode body, a dielectric that overlies the anode body, and a solid electrolyte that overlies the dielectric. The solid electrolyte also contains a pre-coat layer that overlies the dielectric and includes an organometallic compound. A solid electrolyte overlies the pre-coat layer that includes pre-polymerized conductive polymer particles, and an external polymer coating overlies the solid electrolyte that contains a pre-polymerized particles and a cross-linking agent.