Patent ID: 8427628

Claim:
An exposure method for projecting an image of a pattern of a mask onto a substrate and exposing the substrate, the method comprising: reciprocating the mask along a first direction; synchronizing a movement of the mask and a movement of the substrate to a second direction along a surface of the substrate; illuminating a first illumination area of the mask to illuminate a portion of a first pattern of the mask while closing the first illumination area in areas other than the illuminated portion of the first pattern of the mask; projecting an image of the first pattern of the mask with the first illumination area onto the substrate as an erected image with respect to the second direction during a first period in which the mask is moving to one side of the first direction; and projecting an image of a second pattern of the mask onto the substrate as an inverted image with respect to the second direction during a second period in which the mask is moving to the other side of the first direction.