Patent ID: 7553678
Filing Date: 2009-06-30
Classification: G03F,H01L

Abstract:
1. A method for detecting a condition for manufacturing a semiconductor wafer, the method comprising: (a) providing a photomask having a plurality of pattern areas, each of the pattern areas having a plurality test lines, pitches between the test lines of different pattern areas being different; (b) exposing a plurality of wafers via the photomask with different sets of process parameters so as to form pattern areas with test lines of different pitches on each of the wafers; (c) measuring a critical dimension of each of the pattern areas of each of the wafers; (d) establishing a relationship between the pitches of the pattern areas of each of the wafers and the measured critical dimensions of the pattern areas of the wafer; (e) exposing a wafer via the photomask so as to form pattern areas with test lines of different pitches on the wafer; (f) measuring a critical dimension of each of the pattern areas of the wafer in step (e); (g) establishing a relationship between the pitches of the pattern areas of the wafer in step (e) and the measured critical dimensions of the pattern areas of the wafer in step (e); (h) finding a relationship from the relationships established in step (d) which is most similar to the relationship established in step (g); and (i) detecting a set of process parameters used to expose the wafer in step (e) according to the relationship found in step (h).