Non-volatile memory device utilizing dummy memory block as pool capacitor
A non-volatile memory device includes a plurality of memory blocks grouped into pages, page buffer regions corresponding to the pages of the plurality of memory blocks; and a peripheral circuit region for supporting operations of the pages of the plurality of memory blocks. The peripheral circuit region comprises a plurality of pool capacitors. At least one of the memory blocks is a dummy block. The dummy block is configured to form a supplementary pool capacitor for suppressing power noise.
1. A non-volatile memory device, comprising:
a plurality of memory blocks grouped into pages, wherein at least one of the memory blocks is a dummy block, wherein the dummy block and the plurality of memory blocks have the same structure;
page buffer regions corresponding to the pages of the plurality of memory blocks; and
a peripheral circuit region for supporting operations of the pages of the plurality of memory blocks, wherein the peripheral circuit region comprises a plurality of pool capacitors, wherein the dummy block is configured to form a supplementary pool capacitor for suppressing power noise.
2. The non-volatile memory device according to claim 1 , wherein the dummy block comprises a substrate and an alternating layer stack on the substrate.
3. The non-volatile memory device according to claim 2 , wherein the alternating layer stack comprises multiple conductive layers and multiple dielectric layers alternately laminated on one another.
4. The non-volatile memory device according to claim 3 , wherein the dummy block further comprises:
stair structures at two opposite ends of the dummy block; and
contacts disposed on the stair structures and electrically connected to the multiple conductive layers.
5. The non-volatile memory device according to claim 4 , wherein the multiple conductive layers are sequentially and alternately biased to a power source and a ground potential via the contacts disposed on the stair structures, thereby forming capacitors between the multiple conductive layers, wherein the multiple dielectric layers act as a capacitor dielectric.
6. The non-volatile memory device according to claim 5 , wherein the power source comprises an internal power source or an external power source.
7. The non-volatile memory device according to claim 4 , wherein at least two neighboring conductive layers of the multiple conductive layers are biased to a same power source via the contacts disposed on the stair structures.
8. The non-volatile memory device according to claim 1 , wherein the dummy block is disposed at an outskirt of each of the pages of the plurality of memory blocks.
9. The non-volatile memory device according to claim 1 , wherein the dummy block is split into multiple sub-blocks.
10. A non-volatile memory device, comprising:
a plurality of memory blocks grouped into pages, wherein at least one of the memory blocks is a dummy block configured to form a supplementary pool capacitor for suppressing power noise, wherein the dummy block and the plurality of memory blocks have the same structure.