Solid Electrolytic Capacitor with Improved Leakage Current

A method for forming a capacitor assembly, the method comprising:

• anodically oxidizing a sintered porous anode body to form an anode;
• applying a solution to the anode that includes an organometallic compound having the following general formula:
• wherein,
• M is an organometallic atom;
• R1, R2, and R3 are independently an alkyl or a hydroxyalkyl, wherein at least one of R1, R2, and R3 is a hydroxyalkyl;
• n is an integer from 0 to 8;
• X is an organic or inorganic functional group;
• polymerizing a conductive polymer precursor monomer in the presence of an oxidative catalyst to form an inner solid electrolyte layer that overlies the pre-coat layer;
• and
• applying a dispersion of conductive polymer particles to form an outer solid electrolyte layer that overlies the inner solid electrolyte layer.