Illuminated multilayer structure with embedded area light source

Multilayer assembly (100, 200, 300) for an electronic device comprises a substrate film (202) configured to accommodate electronics (210, 212, 214) on at least first side thereof, said film having the first side and a second side, at least one area light source (215) on the first side of the substrate film (202) and configured to emit light of predetermined frequency or frequency band, a molded lightguide layer (204) provided onto the first side of the substrate film (202) and at least partially embedding the light source (214), the lightguide layer (204) being of optically at least translucent material, wherein the plastic lightguide layer (204) is configured to transmit light emitted by the embedded light source (215) so that the transmitted light propagates within the lightguide layer (204) and is outcoupled therefrom via an outer surface thereof substantially opposite to the embedded light source, and a masking layer (106) provided on the outer surface of the plastic lightguide layer (204), containing sub