AC-thermal-simulation

还得看看AC的热仿真,这个事情不是拍脑袋这么简单
ref:Monte Carlo analysis of thermal effects in the DC and AC performance of AlGaN/GaN HEMTs

  • 用electro-thermal simulation 复现了output 和transfer characteristic
  • 还搞了一个thermal resistance method 来仿真交流情况,待会仔细看看

ref:Lattice heat flow thermal modeling of recessed bridge-gate InAlGaN/GaN HEMT

用recess gate 构型

  • silvaco TCAD
  • model 包括 drift-diffusion ;hydrodynamic carrier transport ;SRH,auger; polarization;mobility model to capture high/low field;
  • phonon scattering & surface scattering ; lattice heat flow
    欸silvaco有phonon功能吗
    这个模型是CVTmodel,里面含有phonon散射的项


  • lattice heat flow using giga

    热容*温变=产热+传热

    考虑自热过后饱和电流下降了,怎会如此,我记得我看的结论是限制电流的是空间电荷区,而且2DEG不是有温度稳定性吗

    截止频率定义为开路交流增益为1的频率,要求:
  • 小电容,高gm的确GaN是最好的