Patent ID: 7241542
Filing Date: 2007-07-10
Classification: B82Y,H01J,Y10S

Abstract:
1. A process for controlling proximity effect correction in an electron beam lithography system, wherein exposure is controlled by a control function in order to obtain resulting patterns after processing which conform to design data, comprising the steps of: exposing an arbitrary set of patterns without applying the process for controlling the proximity correction; measuring the geometry of the resulting test structures and thereby obtaining a set of measurement data; determining basic input proximity parameters from the set of measurement data; fitting a model to the set of measurement data set and thereby obtaining an optimized set of proximity parameters; applying the control function to an exposure control of the electron beam lithography system during the exposure of a pattern according to the design data; individually changing at least the basic input proximity parameters of a control function; and applying the individually changed proximity parameters to a calculation and comparing the calculated results with the set of measurement data.