Backlit module and illuminated keyswitch structure

A backlit-module-embedded illuminated keyswitch structure includes a baseplate, a mask film disposed below the baseplate and having a first coating configured to substantially reflect a light and a second coating configured to substantially block the light, a light guide sheet disposed at one side of the mask film opposite to the baseplate and having a light source hole, and a reflective layer disposed at one side of the light guide sheet opposite to the mask film and having an opening communicating with the light source hole, wherein the second coating includes a second main coating region and a plurality of second coating sub-regions extending from the second main coating region and arranged along a periphery of the second main coating region to form a plurality of intermediary regions among the second coating sub-regions; the first coating and the second coating are disposed right above the light source hole, and a portion of the first coating is located in the intermediary regions.