A fuel reformer burner in which fuel gas and anode-off-gas may be burned and backfire may be prevented during combustion of AOG includes a fuel supply portion, an anode-off-gas supply portion; and a combustion air supply portion. Side walls of the word line patterns and the gate pattern are covered with word line spacers and gate spacers having the same width as that of the word line spacers, respectively. This is implemented by logically expanding the partition to include consideration of the external portions during timing optimization and analysis. The thermoelectric cooler includes a substantially rectangular insulated container with a door extending in a vertical plane on the forward facing container wall and pivoting on a horizontal hinge located on the bottom edge of the door.