控制界面态减少表面可动电荷降低晶体管的电噪声

通过对比2688B, 2688S, 2688 3种工艺技术生产的彩色 电视机高频视放晶体管的CB结反向漏电流I_cbo和电噪声谱密度S_vcb (f), 论述了界面态和表面可动电荷能够引起晶体管表面漏电流, 从而使器件产生电噪声, 并间接影响到反向击穿电压、 小电流放大系数等参数. 实验表明, 采用合适的表面钝化技术, 可有效控制晶体管的表面漏电流, 降低晶体管的电噪声, 使器件的可靠性、 稳定性及其使用寿命得到提高.

Controlling Interface State to Lower Electric Noise and Surface Movable Charge

The paper contrasted CB junction reverse leak currents I_(cbo) and electronic noise spectrums S_(vcb)(f) of color TV high frequency video transistors(2688B, 2688S, 2688) produced by three kinds of techniques. It's discussed that interface state and surface movable charge cause surface leak current, which make devices (produce) electronic noise and affect other parameters such as reverse breakdown voltage and small current (amplifying) coefficient. The experiment showed that surface leak current can be controlled, transistor electronic noise can be lowered and the reliability, stability and life can be enhanced by adopting surface passivation (technique).