Laminated body and electronic device

A laminated body comprising:

• a substrate portion composed of silicon carbide;
• and
• a graphene film disposed on a first main surface of the substrate portion, the graphene film having an atomic arrangement oriented with respect to an atomic arrangement of the silicon carbide of the substrate portion,
• a region in which a value of GIG in Raman spectrometry is not less than 1.2 being not less than 10% of the area of an exposed surface of the graphene film, the exposed surface being a main surface of the graphene film opposite to the substrate portion,
• the graphene film covering not less than 95% of the first main surface of the substrate portion,
• the graphene film having a carrier mobility of not less than 5000 cm2/Vs,
• the substrate portion having a disc-like shape,
• the substrate portion having a diameter of not less than 50 mm.