Accumulation-type vs. inversion-type: narrow channel effect in VLSI mesa-isolated fully-depleted ultra-thin SOI PMOS devices

The paper reports the sidewall-related narrow channel effect in mesa-isolated fully-depleted ultra-thin SOI inversion-type and accumulation-type PMOS devices. Based on the study, contrary to inversion-type devices, the threshold voltage of mesa-isolated ultra-thin SOI accumulation-type PMOS devices shrinks as the channel width scales down as a result of the buried-channel effect influenced by the sidewall via the buried oxide.