Top plate for cooking device
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United States of America Patent
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Sep 16, 2014
Grant Date -
May 19, 2011
app pub date -
Jun 13, 2009
filing date -
Jul 18, 2008
priority date (Note) -
In Force
status (Latency Note)
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Abstract
To provide a top plate for a cooking device which has low transmittance in a visible wavelength range and high transmittance in an infrared wavelength range of 3500 nm to 4000 nm. A top plate 1 for a cooking device includes: a glass substrate 10; and a layered coating 2 made of a Si film 11 and a silicon nitride film 12 which are formed on the glass substrate 10. Where t1 represents the thickness of the Si film 11 and t2 represents the thickness of the silicon nitride film 12, (t1, t2) in FIG. 1 showing the relation between the thickness t1 of the Si film and the thickness t2 of the silicon nitride film is within the bounds X defined by connecting Points A1 to A36 shown in TABLE 1 in this order with straight lines.
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