Patent ID: 7562319
Filing Date: 2009-07-14
Classification: G03F

Abstract:
1. A method of correcting a fabrication layout corresponding to an original fabrication layout for proximity effects by using a computer system, the method comprising: building an inverse proximity effects model using information from a test mask with a plurality of polygons of uniform light transmission properties and a printed features layer fabricated using the test mask, wherein the inverse proximity effects model accepts as input positions of edges in the printed features layer and produces an output related to a position of an edge on the test mask; executing a routine implementing the inverse proximity effects model for a segment of an edge in the original fabrication layer corresponding to the segment in the fabrication layout; and determining a correction for the segment based on a difference between the output from the inverse proximity effects model and an initial position for the segment in the fabrication layout, wherein the building, the executing and the determining use the computer system.