Periphery fill and localized capacitance
View Patent ↗Methods, systems, and devices for periphery fill and localized capacitance are described. A memory array may be fabricated with certain containers connected to provide capacitance rather than to operate as memory cells. For example, a memory cell having one or two transistors, or other switching components, and one capacitor, such as a ferroelectric or dielectric capacitor, may be electrically isolated from one or more containers sharing a common access line, and the isolated containers may be used as capacitors. The capacitors may be used for filtering in some examples. Or the capacitance may be used to boost or regulate voltage in, for example, support circuitry.
1. An electronic memory apparatus, comprising:
a memory cell that comprises a selector device, a second selector device, and a memory element formed in a container type common to an array that comprises the memory cell, wherein the memory element is coupled with a first segment of a first access line via the selector device, and wherein the memory element is coupled with a first segment of a second access line via the second selector device; and
a capacitor formed in the container type common to the array and coupled with a second segment of the first access line, wherein the capacitor is coupled with a second segment of the second access line and electrically isolated from the memory cell.
2. The electronic memory apparatus of claim 1 , wherein the capacitor is coupled with the second segment of the first access line via a first switching component and the second segment of the second access line via a second switching component.
3. The electronic memory apparatus of claim 2 , wherein each of the first switching component and the second switching component comprises a thin film transistor (TFT).
4. The electronic memory apparatus of claim 3 , wherein a gate of each TFT is coupled to a voltage source.
5. The electronic memory apparatus of claim 1 , further comprising:
an additional memory cell that comprises an additional selector device and an additional memory element formed in the container type common to the array, wherein the additional memory element is coupled with the first access line via the additional selector device and the capacitor formed in the container type common to the array is electrically isolated from the additional memory cell.
6. The electronic memory apparatus of claim 1 , further comprising:
a plurality of capacitors formed in the container type common to the array and coupled with a plurality of segments of the first access line, wherein each of the plurality of capacitors is electrically isolated from the memory cell.
7. The electronic memory apparatus of claim 1 , wherein the memory element comprises a ferroelectric capacitor or a dielectric capacitor.
8. The electronic memory apparatus of claim 1 , wherein the capacitor formed in the container type common to the array comprises a ferroelectric capacitor or a dielectric capacitor.
9. A method, comprising:
accessing a memory cell from an array of memory cells that is in electronic communication with a first segment of a first access line and support circuitry; and
capacitively coupling a node in the support circuitry with at least one capacitor that is in electronic communication with a second segment of the first access line while accessing the memory cell, wherein the memory cell and the at least one capacitor are electrically isolated from one another, and wherein the at least one capacitor and the memory cell comprise a same container type.
10. The method of claim 9 , wherein accessing the memory cell comprises:
selecting a first selector device that is coupled between the memory cell and the first segment of the first access line; and
selecting a second selector device that is coupled between the memory cell and a first segment of a second access line, wherein the at least one capacitor is in electronic communication with the first access line and the second access line.
11. The method of claim 9 , further comprising:
selecting a selector device that is coupled between the at least one capacitor and the second segment of the first access line, wherein the capacitive coupling is based at least in part on selecting the selector device.
12. The method of claim 11 , further comprising:
selecting an additional selector device that is coupled between the at least one capacitor and a first segment of a second access line, wherein the capacitive coupling is based at least in part on selecting the additional selector device.
13. The method of claim 9 , wherein capacitively coupling the node in the support circuitry with the at least one capacitor comprises filtering a voltage at the node in the support circuitry with the at least one capacitor that is in electronic communication with the second segment of the first access line.
14. An electronic memory apparatus comprising:
an array of memory cells in electronic communication with a first segment of a first access line;
a plurality of capacitors in electronic communication with a second segment of the first access line, wherein each of the plurality of capacitors is in electronic communication with the second segment of the first access line via a switching component; and
a controller in electronic communication with each of the plurality of capacitors, wherein the controller is operable to:
access a memory cell from the array of memory cells that is in electronic communication with the first segment of the first access line and support circuitry; and
capacitively couple a node in the support circuitry with at least one capacitor that is in electronic communication with the second segment of the first access line while accessing the memory cell, wherein the memory cell and the at least one capacitor are electrically isolated from one another, and where the at least one capacitor comprises and each of the memory cells comprise a same container type.
15. The electronic memory apparatus of claim 14 , wherein the capacitive coupling comprises at least one of:
filtering a voltage at the node with at the at least one capacitor;
supplying a voltage to the node by the at least one capacitor; or
charging the at least one capacitor via the node.
16. The electronic memory apparatus of claim 14 , wherein each capacitor of the plurality of capacitors is a same container type as each memory cell of the array of memory cells.
17. The electronic memory apparatus of claim 14 , wherein each memory cell of the array of memory cells comprises an additional switching component, and wherein each of the switching component and additional switching components comprises a thin-film transistor (TFT).