Patent ID: 7851236
Filing Date: 2010-12-14
Classification: G06F,H01L

Abstract:
1. A film thickness prediction method of predicting a film thickness of a second processed layer after planarization when a circuit pattern is formed on a first processed layer formed on a substrate, a second processed layer is formed on an entire surface, and the second processed layer is planarized, comprising the steps of: by using a test substrate provided with various test circuit patterns, forming a second processed layer on the various test circuit patterns, measuring a thickness of the formed second processed layer, and performing planarization processing on the formed second processed layer, creating, in advance, (1) a first actual measurement database related to a relationship between the circuit pattern and a sectional structure of the second processed layer formed thereon, (2) a second actual measurement database related to a relationship between a circumferential length of the circuit pattern and the thickness of the second processed layer formed thereon, and (3) a third actual measurement database related to a relationship between the circuit pattern and a planarization rate of the second processed layer formed thereon; obtaining, in advance, (4) a reference film thickness T (A) segmenting a first processed layer to be formed on the substrate into grid-like meshes having a predetermined size, and obtaining a pattern area ratio α (B) obtaining an initial thickness T (C) predicting the film thickness of the second processed layer after planarization of the second processed layer from an initial film thickness predicted value Pr