Fabrication of 30 nm gate length electrically variable shallow-junction metal–oxide–semiconductor field-effect transistors using a calixarene resist
We have fabricated electrically variable shallow-junction metal–oxide–semiconductor field-effect transistors (EJ-MOSFETs) with an ultrafine gate for the first time. The gate length was reduced to 32 nm by using electron-beam lithography with a calixarene resist, which has an under 10 nm resolution with a sharp pattern edge. Moreover, normal transistor operation of 32 nm gate-length EJ-MOSFETs was confirmed.