Patent ID: 7368736
Filing Date: 2008-05-06
Classification: B82Y,H01J

Abstract:
1. A charged beam exposure apparatus comprising: a charged beam radiating unit configured to radiate a charged beam; a shaping unit including an opening for shaping the charged beam; a storage unit configured to store a history of data concerning a beam area of the charged beam on the shaping unit; a deflecting unit configured to irradiate the charged beam onto a desired position on a sample by deflecting the charged beam which has passed through the opening of the shaping unit; a calculating unit configured to calculate an average value of the beam area of the charged beam on the shaping unit in a given period of time based on the history of the data concerning the beam area of the charged beam stored in the storage unit; a predicting unit configured to predict at least one of change amount of dimensions of the charged beam passing through the opening to design dimensions of the opening and change amount of an irradiation position of the charged beam on the sample which are corresponding to the average value calculated by the calculating unit, the predicting the at least one of change amounts being carried out based on at least one of a relation between the beam area of the charged beam on the shaping unit previously prepared and change amount of the dimensions of the charged beam passing through the opening to the design dimensions of the opening for shaping the charged beam, and a relation between the beam area of the charged beam on the shaping unit previously prepared and change amount of the irradiation position of the charged beam on the sample; and a correcting unit configured to correct at least one of dimensions of a pattern which corresponds to the charged beam and is to be formed on the sample, a beam irradiation time and a beam irradiation position based on the change amount predicted by the predicting unit.