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以功率晶体管ＢＵ４０６管芯为例采用背面多层电极工艺，大大提高了器件的抗热疲劳性、稳定性和可靠性。产品合格率和间歇工作寿命均达到了国内外同类产品的先进水平
Taking the power transistor BU406 as an example, the backside multi-layer electrode process is adopted, which greatly improves the thermal fatigue resistance, stability and reliability of the device. Product qualification rate and intermittent working life have reached the advanced level of similar products at home and abroad