Stock material or miscellaneous articles – All metal or with adjacent metals – Composite; i.e. – plural – adjacent – spatially distinct metal...
Patent
1998-02-13
1999-08-24
Achutamurthy, Ponnathapura
Stock material or miscellaneous articles
All metal or with adjacent metals
Composite; i.e., plural, adjacent, spatially distinct metal...
428630, 428632, 428633, 428670, B32B 1706, B21D 3900
Patent
active
059423382
ABSTRACT:
Multilayer high transmittance, low emissivity coatings deposited over transparent substrates have improved mechanical durability, e.g. scratch resistance by the inclusion of at least one mechanical durability enhancing layer (hereinafter "MDE layer"). The MDE layer includes one or more pairs of a zinc oxide sublayer having deposited thereover a sublayer of an oxide of zinc and tin. In one embodiment of the present invention, the MDE layer is composed of two sublayers which includes a first sublayer of an oxide of zinc having deposited thereover a second sublayer of an oxide of zinc and tin. In another embodiment of the invention, the MDE layer is composed of four sublayers which includes a first sublayer of an oxide of zinc, having deposited thereover a second sublayer of an oxide of zinc and tin, having deposited thereover a third sublayer of an oxide of zinc, having deposited thereover a fourth sublayer of an oxide of zinc and tin. Coated articles having the MDE layer of the invention can be thermally processed for tempering, heat strengthening, annealing or bending without haze formation and can be manipulated prior to such thermal processing with little or no surface scratching appearing after such thermal processing.
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Arbab Mehran
Criss Russell C.
Marietti Gary J.
Medwick Paul A.
Achutamurthy Ponnathapura
Lepiane Donald C.
PPG Industries Ohio Inc.
Stachel Kenneth J.
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