Quartz crystal oscillator is the use of quartz crystal crystal (sio2) of a resonance device made of piezoelectric effect, its basic structure is: from a quartz crystal cut sheet according to certain azimuth (referred to as the chip, it can be a square, rectangular or circular, etc.), in which the two corresponding surface coating of silver layer as electrode, in each electrode welding a lead to the pin, plus encapsulation shell will constitute the quartz crystal resonator, referred to as quartz crystal or crystal, crystal vibration. Its products are generally sealed with metal shells, but also with glass shells, ceramics or plastic packaging.
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