Patent ID: 6579427
Filing Date: 2003-06-17
Classification: C03C,G02B,Y10T

Abstract:
A method of depositing a coating having an infrared reflecting film comprising the steps of:providing a cathode defined as a first cathode which when sputtered in a non-reactive atmosphere deposits an infrared reflecting film having the possibility of two levels of resistivity, one level of resistivity higher than the other level of resistivity, the resistivity having a higher level provides an emissivity higher than the emissivity provided by the lower level of resistivity; sputtering a metal cathode defined as a second cathode in an atmosphere having sufficient reactive gas to deposit a metal oxide film over a surface of a substrate, the metal oxide film having preferential crystal growth orientation to provide the infrared reflecting film having the lower level of resistivity, and sputtering the first cathode in a non-reactive atmosphere to deposit an infrared reflecting metal film on the metal oxide film wherein the reflecting metal film deposited on the metal oxide film has the lower level of resistivity to provide a low emissivity coated article.