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Surface mount capacitor

Surface mount capacitors are useful for maintaining signal integrity and high speed delivery of charge in electrical and electronic components or devices. They are also particularly useful in switching functions. They are useful for bulk decoupling capabilities to smooth transient requirements seen by a power source. Most surface mount capacitors have some type of capacitive element inside an enclosure or case. External conductive connections or terminations are electrically connected to the internal capacitive element. The capacitor assembly can be placed upon a circuit board and connected to the circuit through the terminations. With the miniaturization of electronic equipment, the surface mount of solid electrolytic capacitors has been necessitated, and surface-mountable solid electrolytic capacitors of chip type have been often employed. Surface mount electrolytic capacitors may be categorized as one of two basic types, those having powder metallurgy bodies, generally fabricated from tantalum or niobium powder, and those having foil coupon anode bodies. The foil coupons used in the latter type of capacitor are usually cut from high purity etched and anodized aluminum foil. Solid tantalum capacitors have been the device of choice for circuit designers desiring the maximum capacitance in a given case size, high reliability, and high resistance to the temperatures associated with the reflow soldering techniques used to attach surface mount components to circuit boards.

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