“…1 Recently, conformal lm deposition techniques, which allow precise thickness control at the atomic scale, are becoming very important. 2 Nitride materials, such as titanium nitride and silicon nitride, have been deposited using conventional deposition methods such as low-pressure chemical vapor deposition (LPCVD) 3,4 and plasma-enhanced chemical vapor deposition (PECVD). 5,6 However, development of memory devices has required another deposition technique such as atomic layer deposition (ALD) [7][8][9] to meet the demand for excellent step coverage and high conformality on extremely high aspect ratio structures.…”