Patent ID: 8734145

Claim:
A mold for nanoimprint lithography assisted by a determined wavelength λ det , comprising an intermediate layer made from a first material and having two opposite faces, a lower layer, provided on a surface of one of the opposite faces of the intermediate layer, made from a second material, the second material formed as a rigid material, and in which n structured zones with micrometric or nanometric patterns are made, n being an integer greater than or equal to 1, and, an upper layer, provided on a surface of the other one of the opposite faces of the intermediate layer, made from a third material, the third material formed as a rigid material, in which n recesses are formed opposite the n structured zones of the lower layer, the n recesses being filled with a fourth material to form n portions; wherein the upper layer has a thickness and a composition such that its transmittance to light for a determined wavelength λ det is lower than the transmittance to light for the determined wavelength λ det of any one of the n portions, and wherein the transmittances of the upper, intermediate, and lower layers at the determined wavelength λ det are such that the transmission of a light for the determined wavelength λ det through the upper, intermediate, and lower layers is less than the transmission of the light for the determined wavelength λ det through any one of the n portions and the intermediate and lower layers.