Patent 7675734 was granted and assigned to Panasonic on March, 2010 by the United States Patent and Trademark Office.
An electrolytic solution for an electrolytic capacitor includes an organic solvent, an additive dissolved in the organic solvent, and an electrolyte. The additive is made of at least one of borates represented by one of formula (1), formula (2), and formula (3). The electrolyte is phthalic acid 1,2,3,4-tetramethylimidazolynium.