Panasonic Polymer Capacitors (Hybrid / OS-CON / POSCAP / SP-Cap) have excellent frequency charateristics.
Hybrid: Stable ESR and capacitance over frequency, combining advatnages of both aluminium elextrolytic and polymer technologies.
OS-CON: Excellent requency characteristics thanks to high conductive polymer as electrolyte.
POSCAP: Using highly conductive polymer as electrolyte greatly improves ESR and impedance charateristics over frequency.
SP-Cap: Stable ESR and capacitance at high frequency.