Patent ID: 7264741

Claim:
A method of processing a sheet-like glass substrate, the sheet-like glass substrate having a top major surface and an opposite, bottom major surface, the method comprising: a) providing a coater adapted for applying coating onto the substrate, the coater comprising a substrate support defining a path of substrate travel extending through the coater, a downward coating apparatus positioned above the path of substrate travel, and an ion gun positioned beneath the path of substrate travel, wherein the ion gun is at a location further along the path of substrate travel than the downward coating apparatus; b) conveying the substrate along the path of substrate travel; c) operating the downward coating apparatus to coat the top major surface of the substrate; and d) operating the ion gun to emit an ion beam toward the bottom major surface of the substrate, said operation of the ion gun being performed to treat the bottom major surface of the substrate as the substrate travels the path of substrate travel so that the entire bottom major surface of the substrate will have been treated once travel of the substrate past the ion gun is complete to remove any oversprayed coating that was inadvertently deposited upon marginal portions of the bottom major surface of the substrate during said operation of the downward coating apparatus.