Method for manufacturing foldable backplate film

A method for manufacturing a foldable backplate film comprising steps of:

• preparing a foldable backplate comprising a base film and a pressure-sensitive adhesive layer provided on one side of the base film;
• attaching a first release film to the opposite side of the side of the pressure-sensitive adhesive layer that is in contact with the base film;
• attaching a protective film to the opposite side of the side of the base film that is in contact with the pressure-sensitive adhesive layer;
• half-cutting the foldable backplate in a direction from the first release film to the protective film along a cutting line dividing a body part and a pad part;
• peeling the first release film from the pressure-sensitive adhesive layer after the half-cutting step;
• and
• attaching a non-cut second release film to the position where the first release film has been peeled off to manufacture the foldable backplate film,
• wherein at least one width of the second release film is greater than the width of the foldable backplate.