Patent ID: 7079219

Claim:
A method for manufacturing a semiconductor device, comprising: preparing a photo mask on which first and second focus monitor patterns to form latent images of first and second focus monitor marks on a photo resist film, and a circuit pattern on a mask to form a latent image of the circuit pattern on the photo resist film are disposed; preparing first characteristics which show the defocus value characteristics of exposure light for a dimension difference or ratio of the latent image of the first focus monitor mark and the latent image of the second focus monitor mark, or a dimension difference or ratio of a first focus monitor mark and a second focus monitor mark obtained from developing the photo resist film on which the latent image for the marks are formed; disposing a first wafer on which the first photo resist film is formed inside an exposure chamber of an exposure apparatus; forming latent images of the first and second focus monitor marks on the first photo resist film; obtaining a first dimension difference or ratio which shows the dimension difference or ratio of the latent image of the first focus monitor mark and the latent image of the second focus monitor mark formed on the first photo resist film, or the dimension difference or ratio of a first focus monitor mark and a second focus monitor mark obtained by developing the first photo resist film on which the latent images are formed; calculating a first defocus value based on the first dimension difference or ratio and the first characteristics; calculating the first defocus value based on a plurality of atmosphere pressures or on a plurality of pressure states in the exposure chamber, and obtaining second characteristics showing defocus value characteristics for the atmosphere pressures or the pressure values inside the exposure chamber; disposing a second wafer on which the second photo resist film is formed, in the exposure chamber; measuring the atmosphere pressure or the pressure inside the exposure chamber either before or after the second wafer has been disposed; predicting the defocus value based on the measured pressure value and the second characteristics; correcting the relationship between a focus position of the exposure light and a position on the optical axis of the exposure light of the second resist film in accordance with the predicted defocus value; and forming the latent images of the first and second focus monitor marks and the latent image for the circuit pattern on the second photo resist film after the correction.