Stock material or miscellaneous articles – Composite – Of quartz or glass
Reexamination Certificate
2005-07-12
2005-07-12
Jones, Deborah (Department: 1775)
Stock material or miscellaneous articles
Composite
Of quartz or glass
C428S428000, C428S433000, C428S434000, C428S446000, C428S697000, C428S698000, C428S699000, C428S701000, C428S702000, C428S704000
Reexamination Certificate
active
06916542
ABSTRACT:
An article includes a substrate, a functional coating deposited over the substrate, and a protective coating deposited over the functional coating. The functional coating and the protective coating define a coating stack. The protective coating provides the coating stack with an emissivity value higher than the emissivity value of the functional coating alone. The protective coating can have a thickness in the range of greater than 100 Å to less than or equal to 10 microns and a refractive index in the range of 1.4 to 2. The protective coating can include a first layer formed over the functional coating and a second layer formed over the first layer. The first layer can include 50 wt. % to 100 wt. % alumina and 50 wt. % to 0 wt. % silica, and the second layer can include 50 wt. % to 100 wt. % silica and 50 wt. % to 0 wt. % alumina. An alternating current power supply and cathode target system includes a cathode target including aluminum in the range of 5 wt. % to 100 wt. % and silicon in the range of 0 wt. % to 95 wt. %.
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Buhay Harry
Finley James J.
Lehan John P.
Thiel James P.
Blackwell-Rudasill G.
Jones Deborah
Miles Jacques B.
PPG Industries Ohio Inc.
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