Patent ID: 6709793
Filing Date: 2004-03-23
Classification: G03F

Abstract:
A method for manufacturing a lithographic reticle for transferring an integrated circuit design to a semiconductor wafer, the method comprising the steps of:creating an optical pattern correction (OPC) test pattern having subresolution assist features in a first reticle frame portion of a first reticle; manufacturing the first reticle; measuring the optical pattern correction test pattern on the first reticle to extract first critical parameters of the optical pattern correction test pattern and provide extracted first critical parameters; identifying an OPC model; executing the OPC model using the extracted first critical parameters to generate a modified integrated circuit design; building a production reticle using the modified integrated circuit design; placing the OPC test pattern in a second reticle frame; manufacturing a second reticle having the second reticle frame; measuring the OPC test pattern on the second reticle frame to extract second critical parameters and provide extracted second critical parameters; and comparing the extracted second critical parameters to the extracted first critical parameters to determine whether the extracted second critical parameters are within predetermined tolerances.