Interleaved array architecture
View Patent ↗A partition may be made up of two planes of memory cells in a phase change memory. These planes may be configured so that they are not adjacent to one another. In some embodiments, this may mean that the adjacent planes may share sensing circuits, reducing the overall size of the memory array. In addition, by using non-adjacent planes to make up a partition, the planes may be spaced in a way which reduces resistance of power conveying lines. This may mean that smaller sized lines may be used, further reducing the size of the overall array.
1. A memory comprising:
a first plane of bit alterable, crosspoint memory cells, said first plane including at least two tiles, each tile including a group of memory cells on a series of adjacent word lines and bitlines;
a second plane of bit alterable, crosspoint memory cells, said second plane including at least two tiles, each tile including a group of memory cells on a series of adjacent word lines and bitlines;
a single block of sensing circuits for both said first and second planes; and
wherein said memory is of a size of two times the quantity of a length of the plane and a length of the block of sensing circuits minus a length of the block of sensing circuits times the number of planes over two.
2. The memory of claim 1 wherein said cells of said first and second planes include chalcogenide.
3. The memory of claim 1 wherein said block of sensing circuit is between said first and second planes.
4. The memory of claim 3 wherein each of said planes is accessed together with another plane other than one of said first and second planes.
5. The memory of claim 1 wherein said first and second planes are part of a partition not including the other of said first and second planes.
6. The memory of claim 1 wherein said block of sensing circuits is a contiguous block.
7. The memory of claim 6 including a plurality of tiles within each of said planes, said tiles including a plurality of cells on adjacent row lines and adjacent bitlines.
8. The memory of claim 1 wherein each of said planes includes at least two tiles.
9. The memory of claim 8 wherein each of said tiles includes at least two bitlines.
10. The memory of claim 1 wherein said memory has a worst case voltage drop of 1.5 times the current required by each plane times the resistance to the length of a power supply for the plane.