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(Seoul National University) (Seoul National University) (Seoul National University) (Samsung Display) (Samsung Display) (Samsung Display) (Seoul National University)
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대한전자공학회 JOURNAL OF SEMICONDUCTOR TECHNOLOGY AND SCIENCE Journal of Semiconductor Technology and Science Vol.26 No.4
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    초록·키워드

    A novel hot-carrier lifetime prediction method is proposed for long-channel p-channel MOSFETs in the subthreshold region, which can be used for various driving transistor applications: organic light-emitting diode on silicon (OLEDoS), DC/DC converters, power inverters and LEDs. Owing to the extremely low subthreshold current of p-channel MOSFETs, it is challenging to detect hot-carrier-induced degradation (HCD) for > 10,000-s stress time, which makes lifetime prediction difficult. In this work, both experimental and simulation data show that the secondary hot electron energy which is the primary degradation factor of p-channel MOSFETs is proportional to the gate (V<sub>G</sub>) and drain (V<sub>D</sub>) voltage difference (V<sub>GD</sub>). Consequently, by simultaneously increasing V<sub>G</sub> and V<sub>D</sub> while preserving the VGD, the HCD lifetime prediction of p-channel MOSFETs can be successfully accelerated in the subthreshold region. For example, the HCD lifetime of long-channel p-channel MOSFETs is estimated to be 2.90×10<sup>12</sup> s at V<sub>G</sub> = −0.7 V referring to the experimental data measured at VG = −1.5 V.

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