Patent ID: 6580494
Filing Date: 2003-06-17
Classification: G03F

Abstract:
A method of projection imaging comprising the steps of:providing a substrate panel with a generally planar photosensitive surface for receiving a projection image, the planar surface having an X axis and a Y axis normal to the X axis; providing an image mask parallel to and above the panel surface, the image mask having a horizontal side dimension and a vertical side dimension normal to the horizontal, wherein one of the horizontal and vertical dimensions is greater than the other; aligning the horizontal mask dimension with one of the panel X or Y axes, and the vertical mask dimension with the other of the panel X or Y axes; providing a projection lens between the mask and the panel for receiving and adjusting the size of a mask projection image, the lens having a range of magnification and reduction settings; selecting a projection lens magnification or reduction setting responsive to an X axis distortion factor and a Y axis distortion factor, wherein the magnification or reduction selection is more responsive to the distortion factor of the X or Y axis aligned with the greater of the horizontal and vertical mask dimensions; and projecting a mask projection image from the mask through the projection lens upon the substrate surface.