Plate defect mitigation techniques
Methods, systems, techniques, and devices for operating a ferroelectric memory cell or cells are described. Groups of cells may be operated in different ways depending, for example, on a relationship between cell plates of the group of cells, pages of cells, and/or sections of cells. Cells may be selected in pairs or in larger multiples in order to accommodate an electric current relationship (such as a short) between two or more cells within a group, a page, and/or a section. When performing an access based on a smaller page size, a larger page size of cells may be selected to accommodate a short between plates within the smaller page, the larger page, and/or a section of memory that includes the smaller page or the larger page.
1. A method, comprising:
identifying a short between a first cell plate and a second cell plate that is adjacent to the first cell plate, wherein identifying the short between the first cell plate and the second cell plate that is adjacent to the first cell plate comprises identifying that a fuse is triggered based at least in part on the short existing between the first cell plate and the second cell plate, the first cell plate included in a first cell plate group comprising a first plurality of cell plates and the second cell plate included in a second cell plate group comprising a second plurality of cell plates; and
activating, concurrently, a first access line coupled with a first set of ferroelectric memory cells associated with the first cell plate and a second access line coupled with a second set of ferroelectric memory cells associated with the second cell plate to mitigate current associated with the short between the first cell plate and the second cell plate.
2. The method of claim 1 , further comprising:
identifying that the first cell plate is in a last position in the first cell plate group.
3. The method of claim 2 , further comprising:
identifying that the second cell plate is in a first position in the second cell plate group.
4. The method of claim 1 , wherein the first plurality of cell plates are adjacent and the second plurality of cell plates are adjacent.
5. The method of claim 1 , further comprising:
identifying a third cell plate included in a third cell plate group; and
identifying a fourth cell plate included in the second cell plate group or the third cell plate group.
6. The method of claim 5 , further comprising:
identifying that the third cell plate is adjacent to the fourth cell plate;
selecting the third cell plate and the fourth cell plate based at least in part on the short between the first cell plate and the second cell plate.
7. The method of claim 5 , further comprising:
identifying that the fourth cell plate is included in the second cell plate group.
8. The method of claim 5 , further comprising:
identifying that the third cell plate is in a first position in the third cell plate group.
9. The method of claim 8 , further comprising:
identifying that the fourth cell plate is in a last position in the second cell plate group.
10. A method, comprising:
identifying a first cell plate included in a cell plate group comprising a plurality of cell plates a second cell plate included in the cell plate group comprising the plurality of cell plates;
determining a spatial relationship between the first cell plate and the second cell plate based at least in part on identifying the first cell plate and identifying the second cell plate;
determining that a short exists between the first cell plate and the second cell plate based at least in part on the spatial relationship, wherein determining that the short exists between the first cell plate and the second cell plate comprises identifying that a fuse is triggered based at least in part on the short existing between the first cell plate and the second cell plate; and
mitigating a current associated with the first cell plate and the second cell plate during at least one access operation based at least in part on identifying that the fuse is triggered.
11. The method of claim 10 , further comprising:
activating a first selection component coupled with the first cell plate and a second selection component coupled with the second cell plate based at least in part on the fuse being triggered.
12. The method of claim 11 , wherein the first selection component is activated concurrently with the second selection component.
13. The method of claim 11 , wherein activating the first selection component coupled with the first cell plate and the second selection component coupled with the second cell plate is based at least in part on determining the spatial relationship between the first cell plate and the second cell plate.
14. The method of claim 10 ,
identifying that the first cell plate is located in a first position of the cell plate group; and
identifying that the second cell plate is located in a second position in the cell plate group.
15. The method of claim 10 , wherein the first cell plate is coupled with a first access line and the second cell plate coupled with a second access line.
16. An apparatus, comprising:
a cell plate group comprising a plurality of cell plates including a first cell plate and a second cell plate; and
a memory controller coupled with the cell plate group, wherein the memory controller is operable to:
identify the first cell plate included in the cell plate group and the second cell plate included in the cell plate group;
determine a spatial relationship between the first cell plate and the second cell plate based at least in part on identifying the first cell plate and identifying the second cell plate; and
determine that a short between the first cell plate and the second cell plate based at least in part on the spatial relationship, wherein determining that the short exists between the first cell plate and the second cell plate comprises identifying that a fuse is triggered based at least in part on the short existing between the first cell plate and the second cell plate; and
mitigate a current associated with the first cell plate and the second cell plate during at least one access operation based at least in part on identifying that the fuse is triggered.
17. The apparatus of claim 16 , wherein the memory controller is operable to:
activate a first selection component coupled with the first cell plate and a second selection component coupled with the second cell plate based at least in part on the fuse being triggered.
18. The apparatus of claim 16 , wherein the memory controller is operable to:
identify that the first cell plate is located in a first position of the cell plate group; and
identify that the second cell plate is located in a second position in the cell plate group.