Embodiments of the invention describe compact memory arrays. In one embodiment, the memory cell array includes first, second, and third gate lines disposed over a substrate, the second gate lines are disposed between the first and the third gate lines. The first, the second, and the third gate lines form adjacent gate lines of the memory cell array. The memory cell array further includes first metal lines disposed over the first gate lines, the first metal lines coupled to the first gate lines; second metal lines disposed over the second gate lines, the second metal lines coupled to the second gate lines; and third metal lines disposed over the third gate lines, the third metal lines coupled to the third gate lines. The first metal lines, the second metal lines and the third metal lines are disposed in different metallization levels.