Patent ID: 9582617
Date: 2017-02-28
CPC Classifications: G03F,G06F

Claim:
1. A simulation device for simulating a manufacturing process including a first processing step using a first mask, and a second processing step using a second mask, said simulation device comprising: one or more computers; a first obtaining module, stored on the one or more computers, configured to obtain a first intensity distribution generated over a substrate of interest over a first time for processing by the first mask; a second obtaining module, stored on the one or more computers, configured to obtain a second intensity distribution generated over the substrate over a second time different from the first time by the second mask; a revising module, stored on the one or more computers, configured to revise an intensity of a region in the first intensity distribution to be processed by the second mask, to a value regarded as a region not to be processed, based on the second intensity distribution, wherein the first mask is different from the second mask, wherein the revising module is configured to reverse a sign of the second intensity distribution and then add the reversed second intensity distribution to the first intensity distribution to provide a summed intensity distribution; and a normalization module configured to set a region of the summed intensity distribution having a value of less than “0” to “0”, and to set a region of the summed intensity distribution having a value exceeding “1” to “1”.