In recent years, chip ceramic capacitors have been increasingly used in electronic products. Unreasonable design and improper operation methods have caused chip ceramic capacitors to fail after high and low temperature cycles and stress selection experiments. Representation. The reasons for the failure of the capacitor were analyzed, and improvement measures were proposed to improve the product quality.
In 2002, ceramic chip capacitors were used in electronic products, and no large-capacity capacitors were found to be ineffective. However, from 2002 to the present, according to the needs of product design, the assembled electronic equipment (box, machine) needs temperature cycling and stress selection. After the product is subjected to temperature cycling and stress selection, the ceramic chip capacitor is continuously ineffective. The occurrence of the appearance (frequency circuit, coupling circuit with 3.9pF failure 80%, 5.1pF failure 11%), the electronic product reliability and production schedule are affected to varying degrees, to analyze the problems, solve the failure Production is necessary. Theoretically, the failure of capacitors is mainly caused by six factors.
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