Patent ID: 7436526
Filing Date: 2008-10-14
Classification: C23C,G01B,H01L

Abstract:
1. A real-time system for monitoring and controlling film uniformity, the system being adapted to a physical vapor deposition (PVD) apparatus including a reaction chamber and a wafer stage used to carry a wafer, the system comprising: a shielding plate, disposed on an inner wall of the reaction chamber above the wafer stage, wherein an opening in the center of the shielding plate exposes the wafer, and particles generated by the PVD apparatus pass through the opening and form a film on the wafer; a monitoring device, including a scanner and a sensor which are disposed on opposite sidewalls of the reaction chamber between the shielding plate and the wafer stage, the monitoring device being used to measure the flux of the particles on every portion of the wafer so as to acquire real-time uniformity data including a function of the wafer position and the flux; and a data processing program for comparing the real-time uniformity data and reference uniformity data and outputting a feedback signal to the PVD apparatus to adjust the process parameter thereof.