Patent ID: 7749691

Claim:
A method of manufacturing a photoelectric conversion device by performing divisional exposure on a predetermined area on a surface of a wafer, through two or more reticles including first and second reticles, on each of which a mask pattern region is formed, such that each center position of the first and second reticles is different from each center position of whole regions of the mask patterns formed on the first and second reticles, the method comprising the steps of: arranging the first and second reticles such that (1) the whole region of the mask pattern formed on the first reticle is shifted in a first direction from a joining position of the divisional exposure, (2) the whole region of the mask pattern formed on the second reticle is shifted in a second direction opposite to the first direction from the joining position of the divisional exposure, and (3) each center position of the first and second reticles is aligned with each optical center of exposure light beams of the first and second reticles; and exposing, to exposure light, the wafer through the first and second reticles, arranged in the arranging step, to form a latent image on the wafer, such that a latent image is formed in a region close to the optical center of an exposure light beam that connects latent image patterns formed on the wafer through the first and second reticles.