Patent ID: 7695598
Filing Date: 2010-04-13
Classification: C03C,C23C

Abstract:
1. A coater adapted for applying coating onto a sheet-like glass substrate, the sheet-like glass substrate having a top major surface and an opposite, bottom major surface, 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 adapted for coating a top major surface of the substrate, and an ion gun positioned beneath the path of substrate travel and adapted for cleaning the bottom major surface of the substrate, wherein the ion gun is at a location further along the path of substrate travel than the downward coating apparatus such that the ion gun is adapted 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 from the bottom major surface of the substrate oversprayed coating inadvertently deposited upon marginal portions of the bottom major surface of the substrate during operation of the downward coating apparatus, further comprising an upward coating apparatus, the upward coating apparatus being positioned beneath the path of substrate travel and adapted for coating the bottom major surface of the substrate, wherein the upward coating apparatus is at a location further along the path of substrate travel than the ion gun, such that the upward coating apparatus is adapted for coating the bottom major surface of the substrate after the ion gun has been operated to clean oversprayed coating from the bottom major surface of the substrate, and wherein the coater does not have any downward coating apparatus further along the path of substrate travel than the upward coating apparatus, such that marginal portions of coating applied to the bottom major surface of the substrate will not be concealed by oversprayed coating from any subsequent downward coating apparatus in the coater.