Why MFC accuracy affects yield
How Mass Flow Controller precision impacts semiconductor process control and final device yield.
MFC (Mass Flow Controller) accuracy directly influences process reproducibility and device yield. In CVD and etch processes, gas flow determines film thickness, composition, and etch rates.
Typical MFC specifications include accuracy (e.g., ±1% of full scale), repeatability, and response time. Errors in flow control can cause within-wafer and wafer-to-wafer variation, affecting device performance and yield.
Engineers should select MFCs with appropriate accuracy for their process window and perform regular calibration per SEMI guidelines.