A method of manufacturing a multi-layered film structure, comprising: Providing a layer one including a plurality of spheroid particulates that are randomly distributed to be separated from one another so that interactions between them can be neglected and a filler material of refractive index n 1 that is positioned in spaces between the plurality of particulates ; wherein the spheroid particulates have a substantially identical diameter with radius a 1 and Providing subsequent layers having i _max -1 layers, i _max being equal to or greater than 2, the subsequent layers comprising a layer i+1 positioned above the layer i, the layer i+1 including a plurality of spheroid particulates that are randomly distributed to be separated from one another so that interactions between them can be neglected and a filler material of refractive index n i+1 that is positioned in spaces between the plurality of particulates, wherein the spheroid particulates have a substantially identical diameter with radius a i+1 , i being the integers from 1 to i_ max -1, wherein at least two layers among the i _max layers have different values in at least one selected from a group consisting of the radius of the particulates in each one of the two layers, and the refractive index of the filler material in each one of the two layers, so that wavelength bands of electromagnetic wave reflected by the at least two layers are different from each other; and controlling the radius of the particulates in at least one of the two layers, with respect to a specific wavelength of an incident electromagnetic wave to be backward scattered by the respective layer, by utilizing Mie theory under the assumption that the incident electromagnetic wave is scattered directly by one particulate so that the difference function which is the value of back-scattering efficiency factor minus extinction efficiency factor is greater than zero. Providing a layer one including a plurality of spheroid particulates that are randomly distributed to be separated from one another so that interactions between them can be neglected and a filler material of refractive index n 1 that is positioned in spaces between the plurality of particulates ; wherein the spheroid particulates have a substantially identical diameter with radius a 1 and Providing subsequent layers having i _max -1 layers, i _max being equal to or greater than 2, the subsequent layers comprising a layer i+1 positioned above the layer i, the layer i+1 including a plurality of spheroid particulates that are randomly distributed to be separated from one another so that interactions between them can be neglected and a filler material of refractive index n i+1 that is positioned in spaces between the plurality of particulates, wherein the spheroid particulates have a substantially identical diameter with radius a i+1 , i being the integers from 1 to i_ max -1, wherein at least two layers among the i _max layers have different values in at least one selected from a group consisting of the radius of the particulates in each one of the two layers, and the refractive index of the filler material in each one of the two layers, so that wavelength bands of electromagnetic wave reflected by the at least two layers are different from each other; and controlling the radius of the particulates in at least one of the two layers, with respect to a specific wavelength of an incident electromagnetic wave to be backward scattered by the respective layer, by utilizing Mie theory under the assumption that the incident electromagnetic wave is scattered directly by one particulate so that the difference function which is the value of back-scattering efficiency factor minus extinction efficiency factor is greater than zero. <EOS>