TOP PLATE FOR COOKING DEVICE

摘要

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 t 1 represents the thickness of the Si film 11 and t 2 represents the thickness of the silicon nitride film 12, (t 1 , t 2 ) in FIG. 1 showing the relation between the thickness t 1 of the Si film and the thickness t 2 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.