Comparison of Young's modulus dependency on beam accelerating voltage between electron-beam- and focused ion-beam-induced chemical vapor deposition pillars

We investigated Young's modulus of amorphous carbon (a-C) pillars that exhibited different properties depending on which of two fabrication methods were used, electron-beam-induced chemical vapor deposition (EB-CVD) or focused ion-beam-induced CVD (FIB-CVD). The Young's modulus of the FIB-CVD pillars was almost linearly proportional to the accelerating voltage, while that of the EB-CVD pillars showed a completely opposite results. Secondary electrons. seemed to play an important role in the increase of Young's modulus of the pillars grown using EB-CVD.