Glazing having a conductive coating and a printed layer, a method for producing the same and use of the same
AssigneePilkington Group Limited
InventorsJoseph Jeremy Boote, Graham Siddons
Life of this patent
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Abstract
The invention provides a glazing comprising first glass sheet comprising a printed layer on a portion of a surface of the glass sheet and a conductive coating on the surface of the first glass sheet. The conductive coating extends over at least a portion of the printed layer to form a coated print portion and extends over a portion of the surface of the glass sheet to form a coated glass portion. The coated print portion has a Developed Interfacial Area Ratio Sdr less than 27.45%. A method for producing the glazing and use of the glazing in a vehicle is also disclosed.
Claims22
A glazing comprising:
- a first glass sheet comprising a printed layer on a portion of a surface of the glass sheet,
- a conductive coating on the surface of the first glass sheet, the conductive coating extending over at least a portion of the printed layer to form a coated print portion and extending over a portion of the surface of the glass sheet to form a coated glass portion,
- wherein the coated print portion has a Developed Interfacial Area Ratio Sdr less than 27.45%, wherein Sdr is measured by an Atomic Force Microscope having tip radius between 2 and 20 nm and wherein the Sdr parameter is the Developed Interfacial Area Ratio and is expressed as the percentage of the definition area's additional surface area contributed by the roughness as compared to the planar definition area.
A method for producing a glazing, the method comprising:
- providing a first glass sheet
- providing an ink and printing a printed layer on a portion of a surface of the glass sheet,
- firing the ink of the printed layer for a firing time in the range 80 to 180 seconds and at a temperature in the range 500° C. to 695° C.,
- depositing a conductive coating on the surface of the first glass sheet, the conductive coating extending over at least a portion of the printed layer to form a coated print portion and extending over a portion of the surface of the glass sheet to form a coated glass portion,
- wherein the ink, the firing time and the firing temperature are selected so that the coated print portion has a Developed Interfacial Area Ratio Sdr less than 27.45%, wherein Sdr is measured by an Atomic Force Microscope having tip radius between 2 and 20 nm and wherein the Sdr parameter is the Developed Interfacial Area Ratio and is expressed as the percentage of the definition area's additional surface area contributed by the roughness as compared to the planar definition area.
Dependencies are inferred from the claim text.