The plastic substrate is not particularly limited and can be any one known to persons having ordinary skill in the art, which includes, for example, but is not limited to, polyester resins, such as polyethylene terephthalate (PET) and polyethylene naphthalate (PEN); polyacrylate resins, such as polymethyl methacrylate (PMMA); polyimide resins; polyolefin resins, such as polyethylene (PE) and polyp