US 11,756,746 B2
Solid electrolytic capacitor containing an intrinsically conductive polymer
Miloslav Uher, Lanskroun (CZ); Kiyofumi Aoki, Shiga (JP); and Pavel Kucharczyk, Detmarovice (CZ)
Assigned to KYOCERA AVX Components Corporation, Fountain Inn, SC (US)
Filed by KYOCERA AVX Components Corporation, Fountain Inn, SC (US)
Filed on Sep. 14, 2022, as Appl. No. 17/944,267.
Application 17/944,267 is a division of application No. 16/536,653, filed on Aug. 9, 2019, granted, now 11,462,366.
Claims priority of provisional application 62/717,122, filed on Aug. 10, 2018.
Prior Publication US 2023/0026663 A1, Jan. 26, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. H01G 9/15 (2006.01); H01G 11/48 (2013.01); H01G 11/56 (2013.01); H01G 9/052 (2006.01); H01G 9/07 (2006.01); H01G 9/042 (2006.01)
CPC H01G 11/48 (2013.01) [H01G 9/0425 (2013.01); H01G 9/052 (2013.01); H01G 9/07 (2013.01); H01G 9/15 (2013.01); H01G 11/56 (2013.01)] 25 Claims
OG exemplary drawing
1. A solid electrolytic capacitor comprising a capacitor element, wherein the capacitor element comprises:
a sintered porous anode body;
a dielectric that overlies the anode body;
a solid electrolyte that overlies the dielectric, wherein the solid electrolyte includes an intrinsically conductive polymer containing repeating thiophene units of the-following general formula (I):

OG Complex Work Unit Chemistry
a is from 0 to 10;
b is from 1 to 18;
R is an optionally substituted C1-C6 linear or branched alkyl group or a halogen atom; and
M is a hydrogen atom, an alkali metal, NH(R1)3, or HNC5H5, wherein R1 is each independently a hydrogen atom or an optionally substituted C1-C6 alkyl group; and
an external polymer coating that overlies the solid electrolyte and includes conductive polymer particles;
wherein the capacitor exhibits a capacitance recovery of about 85% or more at a frequency of 120 Hz.