Patent ID: 6664010
Filing Date: 2003-12-16
Classification: G03F

Abstract:
An OPC method for generating corrected patterns for a phase-shifting mask and its trimming mask, in which an initial layout is predetermined for producing a circuit configuration with the aid of a lithography method from the initial layout, a pattern is generated for a phase-shifting mask which is used for producing part of the circuit configuration, in which, from the initial layout, a pattern for a trimming mask is generated, with the aid of which configurations of the circuit configuration adjoining the conductor configurations of the first part can be produced, and in which the pattern for the phase-shifting mask and the pattern for the trimming mask are corrected, taking into consideration neighborhoods of the configurations of the patterns having influence on the imaging during the photolithography, in such a manner that a circuit configuration which can be produced by means of corrected patterns is more similar with regard to the geometry of the initial layout than a circuit configuration which can be produced by means of the uncorrected patterns wherein, during the correction, the pattern for the phase-shifting mask is firstly corrected in accordance with correction rules for the pattern of the phase-shifting mask in a first correction step, and subsequently, the pattern for the trimming mask is corrected in accordance with correction rules for the pattern of the trimming mask with use of the corrected pattern for the phase-shifting mask in a second correction step, or during the correction, the pattern for the trimming mask is firstly corrected in accordance with correction rules for the pattern of the trimming mask in a first correction step, and subsequently, the pattern for the phase-shifting mask is corrected in accordance with correction rules for the pattern of the phase-shifting mask with use of the corrected pattern for the trimming mask in a second correction step.