Patent ID: 7477354
Filing Date: 2009-01-13
Classification: G03F,H05K

Abstract:
1. A projection exposure apparatus comprising: a light source for irradiating exposing light, a photo mask bigger than a irradiating area of said light source and smaller than a print circuit board as an exposing target, depicted with a whole pattern to be exposed on said print circuit board, wherein said whole pattern comprises independent patterns, and information about positions on said photo mask of said each independent pattern are described on said photo mask, optics positioned between said photo mask and said board for exposing said pattern of the photo mask on said board with expansion at predetermined magnification, a photo mask moving device for positioning a certain area of said photo mask to said irradiating area of said irradiation light from said light source, a board moving device for positioning a certain area of said printed circuit board to an exposing area where said exposing light irradiates through said photo mask and said optics, wherein a first pattern disposed in said certain area of the photo mask is exposed by the light from said light source on said certain area of the printed circuit board, then, in the same manner, other patterns disposed on said photo mask in areas other than said certain area of said photo mask are successively exposed by the light from said light source on areas of the printed circuit board other than said certain area of said printed circuit board in order to expose said whole pattern on the entire printed circuit board and to expose the same patterns as depicted on said photo mask on said printed circuit board.