Cooking top plate

Details Cooking top plate Cooking top plate

2007-04-24

2007-04-24

Paik, Sang Y. (Department: 3742)

Electric heating

Heating devices

Combined with container, enclosure, or support for material...

C219S460100

Reexamination Certificate

active

10514538

ABSTRACT:
A substrate is made of a crystallized glass having translucency and an average linear thermal expansion coefficient of −5×10−7/° C. at 30 to 500° C. The substrate has a first surface (working surface) of a smooth surface having a surface roughness Rmax of less than 0.5 μm, and a second surface (non-working surface) of a rough surface having a surface roughness Rmax of 4 μm. A light shielding layer consisting of a light shielding film and an antioxidant film is formed on the second surface of the substrate through sputtering.

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