The cause of the short circuit and leakage fault of the patch capacitance (II)

The device that stores two parallel conductive polar plates to insulate matter and has the ability to store charge is called capacitor (capacitor or condenser). The conductive plate is called the capacitor electrode (electrode), the insulation material is called the dielectric (dielectric) or the medium.

Capacitance is used to indicate the capacity (or capacity) of a capacitor to store charge. All kinds of capacitors have different capacitance because of the material of the shape shape body of the conductor and the distance between the plate and the type of medium. But the amount of charge Q can be stored is proportional to its potential V, that is, the proportional constant in the Q=CV type is the electric capacity of the capacitor, for short, the capacitance. The unit of C=Q/V capacitance is "Coulomb / volt". To commemorate the great contribution of scientist Faraday (Michael Faraday l791 to 1867) to electricity, the capacitance of 1 Coulomb / volt is called 1 Fala (farad), and the unit mark is F or F for short. In practice, Fala's unit is often too large, for example, if a sphere requires 1 Fala's capacitance, the axial capacitance must be 9*10e9 meters, so the capacitance is often expressed in the axial capacitance of micromethod (mu F) or micromethod (mu F or pF).