Patent ID: 8520194
Filing Date: 2013-08-27
Classification: G01N,H01J

Abstract:
1. A method of forming a deposited material by utilizing a multi-step deposition/etch/deposition (D/E/D) process in a high density plasma (HDP) chemical vapor deposition (CVD) machine, comprising: performing a first deposition (D) step to form the deposited material on a chip; performing an etching (E) step on the deposited material after the first D step; gauging a time point when the chip would be damaged according to a first variation in spectrum intensity of the chip obtained from an optical emission spectroscopy (OES) system during the E step; gauging a time point of starting to perform a second D step according to a second variation in the spectrum intensities of the chip obtained from the OES system; and performing the second D step.