Semiconductor devices having L-shaped cell blocks

A semiconductor device comprising:

• a plurality of memory cell blocks each having a memory cell array where a plurality of memory cells are arrayed and row and column decoders for accessing the memory cells,
• wherein the row and column decoders are disposed in horizontal and vertical directions of the memory cell array so that the plurality of memory cell blocks forms an L shape;
• and
• wherein any one of the plurality of L-shaped memory cell blocks comes in contact with the row and column decoders of another L-shaped memory cell block.