Copper foil for producing graphene and method of producing graphene using the same

A copper foil for producing graphene, including oxides and sulfides each having a diameter of 0.5 μm or more having a total number of 100/mm2 or less measured for an area having a total area of 3 mm2 within a depth of 10 μm from a surface that is a cross-section in parallel to a rolling direction by using a scanning electronic microscope before heating at 1000° C. for 1 hour.

A copper foil for producing graphene, having a number of a dent portion being 20/mm2 or less, the dent portion having a depth ds of 1.5 μm or more being countered;

• ds=DS−DM;
• where DM is a lowest height by measuring 1 mm2 surface by using a confocal microscope and by each height profile of a granular part surrounded by a contour in the two dimensional image of the surface obtained;
• the 1 mm2 surface being heated at 1000° C. for 1 hour, and DS is a highest height that is regarded as a base line in an area of ±25 μm along a plane direction and a rolling direction from the position of DM.

A copper foil for producing graphene, having a number of a convex portion being 100/mm2 or less, the convex portion having a height dt of 1.5 μm or more being countered;

• dt=HM−HS;
• where HM is a highest height by measuring 1 mm2 surface by using a confocal microscope and by each height profile of a granular part surrounded by a contour in the two dimensional image of the surface obtained;
• the 1 mm2 surface being heated at 1000° C. for 1 hour, and HS is a lowest height that is regarded as a base line in an area of ±25 μm in a plane direction and a rolling direction from the position of HM.