A flat panel display (7) generally includes a front substrate (79) and a rear substrate (70) opposite thereto. The front substrate is formed with an anode (78). The rear substrate is formed with a cathode (71) facing the anode. Several sidewalls (72) are interposed between the front substrate and the rear substrate. At least one of the sidewalls has a getter unit (82), and a securing member (822) for fixing the getter unit thereon. The getter unit is comprised of non-evaporable getter material. Thereby maintaining a substantial vacuum in a chamber between the front substrate and the rear substrate.