The effects of (NH4)2Sx treatment on n-GaN MOS device with nano-laminated ALD HfAlOx and Ru gate stack
GaN MOS with ALD HfAlOx/Ru with (NH4)2Sx pre-treatment. Better roughness, higher VBD, and smaller frequency dependence using (NH4)2Sx. (NH4)2Sx suppresses interfacial oxide regrowth on the GaN substrate. The Dit can be reduced further with longer treatment time.
ammonium polysulfide interface trap density passivation gan device