Abstract: A keyboard system having improved protection from electromagnetic interference includes a keypad and a printed circuit board assembly. The keypad includes one or more keys and one or more keypad conductive elements for at least one of the keys. The printed circuit board assembly is coupled to the keypad. The printed circuit board assembly includes a printed circuit board having at least one switch contact area for each of one or more keys on the keypad. The printed circuit board also includes, for at least one of the keys of the keypad, one or more first side vias in a switch contact area and one or more second side vias in the switch contact area. The first side vias are electrically coupled on a first side of a switch for the key. The second side vias are electrically coupled on a second side of the switch for the key.

Abstract: A smooth keyboard with low-key height for association with a keyboard control circuit includes a top enclosure having a generally impenetrable surface, the surface comprising a plurality of keys and a seal edge. A pliable webbing surrounded the keys such that there are no gaps between the keys or between the keys and the top enclosure, the pliable webbing creating a generally impenetrable seal between the keys and between the keys and the top enclosure, the seal edge having a rib. A bottom enclosure formed as a single unit that forms a generally impenetrable surface having a seal edge, the seal edge having a trough, the trough for receiving the rib to form a generally impenetrable seal surrounding the keyboard control circuit.