Patent ID: 7781032
Filing Date: 2010-08-24
Classification: C23C,H01J

Abstract:
1. A method of depositing a thin film, comprising: providing a wafer into a chamber of a thin film apparatus; rotating the wafer; depositing a first thin film on the wafer by flowing a thin film plasma from a first edge of the wafer to a second edge of the wafer via a center of the wafer, and after depositing the first thin film, the first thin film at the center of the wafer being thinner than the first thin film at the edges of the wafer; creating a temperature gradient within the thin film apparatus, wherein a temperature at the center of the wafer is higher than a temperature at the edges of the wafer; and depositing a second thin film on the wafer, and after depositing the second thin film, the second thin film at the center of the wafer being thicker than the second thin film which is deposited at the edges of the wafer, wherein the first thin film and the second thin film together form a planar thin film having approximately a same thickness at the center of the wafer and at the edges of the wafer.