Shape dummy cells that are designed to have the same dimensions and structures
as MTJ memory cells are additionally provided in the peripheral portion of an MTJ
memory cell array in which normal MTJ memory cells for storing data are arranged
in a matrix. The MTJ memory cells and the shape dummy cells are sequentially arranged
so as to have a uniform pitch throughout the entirety. Accordingly, non-uniformity
between MTJ memory cells in the center portion and in border portions of the MTJ
memory cell array, respectively, after manufacture due to high and low densities
of the surrounding memory cells can be eliminated.
