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SMD capacitors are used in vast quantities within the manufacture of all forms of electronic equipment.

After SMD resistors they are the most widely used type of component.

There are many different types of SMD capacitor ranging from ceramic types, through tantalum varieties to electrolytics and more. Of these, the ceramic SMD capacitors are the most widely used.

SMD capacitor basics

Surface mount capacitors are basically the same as their leaded predecessors. However instead of having leads they have metallised connections at either end.

This has a number of advantages:

• Size:   SMD capacitors can be made very much smaller than their leaded relations. The fact that no wired leads are required means that different construction techniques can be sued and this allows for much smaller components to be made.
• Ease of use in manufacturing:   As with all other surface mount components, SMD capacitors are very much easier to place using automated assembly equipment.
• Lower spurious inductance:   The fact that no leads are required and components are smaller, means that the levels of spurious inductance are much smaller and these capacitors are much nearer the ideal component that their leaded relations.

Multilayer ceramic SMD capacitors

The multilayer ceramic SMD capacitors form the majority of SMD capacitors that are used and manufactured. They are normally contained in the same type of packages used for resistors.

Construction:   The multilayer ceramic SMD cap