Electrolytic - Made of electrolyte, Aluminum electrodes are used by using a thin oxidation membrane - Polarized capacitor - Cheap, readily available, good for storage of charge (energy) availablein very small or very large values in μF- Not very accurate, marginal electrical properties, leakage, drifting, not suitable for use in hf circuits Tantalum - Made of Tantalum Pentoxide. They are electrolytic capacitors butused with a material called tantalum for the electrodes. Superior to electrolytic capacitors - Nonpolarized capacitor - Excellent temperature and frequency characteristics,lack of current-spike-noise. Small size fits anywhere, reliable, most common values readily available. - Expensive, easily damaged by spikes Polyester Film - This capacitor uses a thin polyester film as a dielectric. - Nonpolarized capacitor - Not as high a tolerance as polypropylene, cheap, temperature stable,readily available, widely used. Tolerance is approx 5%...