A powered pushing unit transfers loads no greater than a predetermined magnitude in one direction along the length of a load transfer system. The power layout design forms a power mesh and a power ring with a plurality of metal trunks with uniform line width. A transparent protection film, which has a refractive index that is greater than that of the insulation film, is laminated on the insulation film. As a result, an insulation film between the control gate and the floating gate has a sufficient thickness difference between the upper section and the lower section of the floating gate.