Patent ID: 6265233
Filing Date: 2001-07-24
Classification: H01L

Abstract:
A method for determining a crack limit of a target film deposited on a production wafer after a post annealing procedure, comprising steps of:a) providing a plurality of test wafers;b) forming a plurality of test films of the same material as said target film to be deposited on said production wafer on said plurality of test wafers, respectively, on the condition that said plurality of test films includes at least two kinds of thickness;c) annealing said test wafers with said test films;d) observing whether said annealed test films crack, and detecting thermal shrinkage rate data of said annealed test films; ande) determining said crack limit of said target film deposited on said production wafer according to said thermal shrinkage rate data of said annealed test films deposited on said test wafers.