Patent ID: 7429709

Claim:
A keypad printed circuit board (PCB) assembly for a mobile phone comprising: a PCB on which a plurality of light emitting diodes (LEDs) is surface-mounted such that the LEDs are able to emit light from a side of the PCB; a metal dome section including metal dome parts attached to positions corresponding to signal contacts of the PCB, and a dome tape covering a gap between the metal dome parts excluding a portion overlapped with the LEDs; and a light guide plate coupled to an upper portion of the metal dome section so that the light guide plate and the metal dome section are integrated into one piece, leaving a space therebetween, and having thereunder an uneven pattern reflecting light incident from the LEDs, an LED cover provided on a position corresponding to the LEDs, and a circumferential light-shielding part filling an end-side space between the light guide plate and the metal dome section.