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A method for forming a vehicle window assembly includes applying a band of an opaque ceramic enamel material to a predetermined peripheral portion of a sheet of relatively flat glass, and heating the glass to a prefire temperature to fuse the opaque material to the glass. An electrically conductive

A method for forming a vehicle window assembly includes applying a band of an opaque ceramic enamel material to a predetermined peripheral portion of a sheet of relatively flat glass, and heating the glass to a prefire temperature to fuse the opaque material to the glass. An electrically conductive material is applied to the band in a predetermined pattern to form a pair of bus bars typically along the top and bottom edges of the sheet of glass. The glass is again heated to fire the bus bar material and soften the glass for bending into a desired window shape. A mask is applied to the bus bars for later connection of electrical leads and the sheet of glass is washed prior to the next operation. An electrically conductive film is applied to the second surface of the sheet of glass and electrically connected to the bus bars. The sheet of glass is laminated to a sheet of plastic material which covers the electrically conductive film and, typically, the plastic sheet is laminated to a second sheet of glass which has been preformed, i.e., bent, to conform to the first sheet. Electrical leads are attached to the bus bars to complete the window assembly. The electrically conducting film and glass sheet composition and thickness are chosen to maximize for the window assembly the desired performance characteristics of resistance, transmission, reflection and color-all of which are mutually interactive.

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A method of forming an electrically heated window assembly, comprising the steps of: a. applying to a surface of a first transparent sheet of glass an electrically conducting film stack including a layer of silver metal interposed between layers of zinc oxide, said silver metal layer being of a thic

A method of forming an electrically heated window assembly, comprising the steps of: a. applying to a surface of a first transparent sheet of glass an electrically conducting film stack including a layer of silver metal interposed between layers of zinc oxide, said silver metal layer being of a thickness in the range of 70 to 100 angstroms and said zinc oxide layers being in the range of 350 to 500 angstroms, said filmed sheet having an electrical resistance less than or equal to 10 ohms per square; and b. laminating said first sheet to a second transparent sheet with the filmed surface of said first sheet facing said second sheet, the composition and thickness of said transparent sheets and said electrically conducting film being effective after lamination to provide a window assembly having an Illuminant A transmittance greater than or equal to 70 percent, an Illuminant C reflectance less than or equal to 9 percent and a total solar transmittance less than or equal to 45 percent, the window being neutral in color transmittance and substantially free of reflected color.