The invention relates to a method of aligning a flexible foil sheet having a general first foil sheet length direction to form stacked foil sheet layers on a reel having a reel diameter. The method comprises providing multiple alignment markers in the foil sheet. distanced conform the reel diameter and each having an mark length direction transverse to the first foil sheet length direction, to form protrusions and corresponding recesses on opposite faces of the foil sheet; winding the foil sheet on the reel in the first foil sheet length direction of the foil sheet; and co-aligning the alignment markers to have protrusions of one mark matching with a recess of another mark, so as to block relative movement of the stacked foil sheet layers in the first foil sheet length direction. Preferably, the foil sheet layers are provided with device functionality to form a stacked foil sheet layered device.