Heat treatable coated article with dual layer undercoat

Details Heat treatable coated article with dual layer undercoat Heat treatable coated article with dual layer undercoat

2007-05-29

2007-05-29

McNeil, Jennifer (Department: 1775)

Stock material or miscellaneous articles

Composite

Of quartz or glass

C428S446000, C428S448000, C428S697000, C428S698000, C428S699000, C428S701000, C428S702000, C428S704000

Reexamination Certificate

active

10672066

ABSTRACT:
In certain example embodiments, a multi-layer undercoat may include a layer of or including tin oxide on the glass surface and a layer of silicon nitride thereover. Tin oxide is advantageous in that it is relatively durable, and is a low stress material with excellent adhesion to glass. Moreover, the sputtering rate for tin oxide is several times higher than that of silicon nitride. Thus, problems of high cost (due to slow deposition rate) and durability (due to high compressive stress) can be overcome through the use of tin oxide as a bottom portion of the dual layer overcoat. The coated article may or may not be heat treated in different embodiments of the invention.

REFERENCES:
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patent: 5800933 (1998-09-01), Hartig et al.
patent: 6352754 (2002-03-01), Frost et al.
patent: 2002/0064662 (2002-05-01), Lingle et al.
“Thermally Durable Sputter-Deposited Tin Oxide Films and Their Applications”, (2003) Ebisawa et al., pp. 307-309.

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