MY106108A - Process and apparatus for coating glass. - Google Patents

Abstract

A PROCESS AND APPARATUS FOR COATING A MOVING RIBBON OF HOT GLASS BY CHEMICAL VAPOUR DEPOSITION COMPRISES ESTABLISHING A FIRST FLOW OF A FIRST REACTANT GAS ALONG THE HOT GLASS SURFACE SUBSTANTIALLY PARALLEL TO THE DIRECTION OF MOVEMENT OF THE GLASS, ESTABLISHING A SECOND FLOW OF THE SECOND REACTANT GAS AS A TURBULENT FLOW AT AN ANGLE TO THE GLASS SURFACE, INTRODUCING SAID SECOND FLOW INTO SAID FIRST FLOW AT SAID ANGLE, WHILE AVOIDING UPSTREAM FLOW OF SAID SECOND REACTANT GAS IN SAID FIRST FLOW, DIRECTING THE COMBINED GAS FLOW ALONG THE SURFACE OF THE HOT GLASS AS A TURBULENT FLOW, AND THEREAFTER WITHDRAWING THE USED COATING GAS AWAY FROM THE HOT GLASS. THE APPARATUS INCLUDES AN OPEN FACED COATING CHAMBER OVER THE GLASS, WITH A STEP IN THE CELLING OF THE COATING CHAMBER WHERE THE SECOND FLOW OF GAS INTRODUCED INTO THE FIRST FLOW OF REACTANT GAS. THE PROCESS AND APPARATUS ENABLE A SUBSTANTIALLY UNIFORM COATING OVER 200 NM THICK TO BE DEPOSITED IN A SHORT COATING ZONE, AND IS USEFUL FOR APPLYING METAL OXIDE COATINGS, FOR EXAMPLE FLUORINE DOPED TIN OXIDE COATINGS, TO HOT GLASS.