Portable telephone set housing having an illuminated switch panel

A portable telephone set housing comprising:

• a casing including a support base having a plurality of holes, with a metallic film being formed on an inner surface of said case;
• a flexible printed circuit board mounted on said support base of the case and having a membrane portion and a display portion, said flexible printed circuit board further having a plurality of holes in positions corresponding to positions of the holes of the case;
• a key top sheet placed on said flexible printed circuit board and having a plurality of key tops, said key top sheet having a plurality of holes in positions corresponding to positions of the holes of the case;
• and
• a switch panel including a plurality of openings for insertion therein of said key tops, a plurality of partition walls for partitioning said openings by groups, a plurality of projections formed respectively on said partition walls in positions corresponding to positions of the holes of the case, and a metallic film formed on end faces of said partition walls and said faces of said projections, said switch panel being mounted to said case with said projections inserted into the holes of the case through the holes formed in the key top sheet and the holes formed in said flexible printed circuit board.