Nonvolatile memory device and method of controlling initialization of the same

Patent metadata

Field	Value
Publication number	US-11056200-B2
Application number	US-202017012135-A
Country	US
Kind code	B2
Filing date	Sep 4, 2020
Priority date	Jul 31, 2019
Publication date	Jul 6, 2021
Grant date	Jul 6, 2021

Abstract

Method of controlling initialization of nonvolatile memory device, where nonvolatile memory device includes memory cell region including first metal pad and peripheral circuit region including second metal pad and vertically connected to memory cell region by first and second metal pads, includes performing first sensing operation to sense write setting data stored in first memory cells in memory cell region of first memory plane and store first read setting data in first page buffer circuit in peripheral circuit region of first memory plane, performing second sensing operation to sense write setting data stored in second memory cells in memory cell region of second memory plane and store second read setting data in second page buffer circuit in peripheral circuit region of second memory plane and performing dump-down operation to store restored setting data in buffer based on first read setting data and second read setting data.

First claim

What is claimed is:

1. A method of controlling initialization of a nonvolatile memory device, the nonvolatile memory device comprising a memory cell region including a first metal pad and a peripheral circuit region including a second metal pad and vertically connected to the memory cell region by the first metal pad and the second metal pad, the method comprising:
performing a first sensing operation to sense a write setting data stored in first memory cells in the memory cell region of a first memory plane and store first read setting data in a first page buffer circuit in the peripheral circuit region of the first memory plane;
performing a second sensing operation to sense the write setting data stored in second memory cells in the memory cell region of a second memory plane and store second read setting data in a second page buffer circuit in the peripheral circuit region of the second memory plane; and
performing a dump-down operation to store restored setting data corresponding to the write setting data in a buffer based on validity of the first read setting data and the second read setting data.

2. The method of claim 1 , wherein performing the dump-down operation includes:
verifying validity of the first read setting data using a first verification circuit connected to the first page buffer circuit;
verifying validity of the second read setting data using a second verification circuit connected to the second page buffer circuit; and
storing valid data corresponding to one of a first data unit and a second data unit in the buffer based on a validity verification result of the first read setting data and a validity verification result of the second read setting data.

3. The method of claim 2 , wherein verifying validity of the first read setting data includes:
verifying validity of each of a plurality of first data units corresponding to the first read setting data divided by a unit bit number, and
wherein verifying validity of the second read setting data includes:
verifying validity of each of a plurality of second data units corresponding to the second read setting data divided by the unit bit number.

4. The method of claim 3 , wherein storing the valid data includes:
sequentially storing first valid data units in the buffer based on the plurality of first data units before one of the plurality of first data units is determined as an invalid data unit; and
sequentially storing second valid data units in the buffer based on the plurality of second data units starting from a second data unit corresponding to the one of the plurality of first data units determined as the invalid data unit.

5. The method of claim 4 , wherein the first verification circuit is enabled to verify validity of the first data units and the second verification circuit is disabled before the one of the plurality of first data units is determined as the invalid data unit, and the first verification circuit is disabled and the second verification circuit is enabled to verify validity of the second data units after the one of the plurality of first data units is determined as the invalid data unit.

6. The method of claim 4 , wherein, when the second sensing operation is not completed at a time point when the one of the plurality of first data units is determined as the invalid data unit, both of the first verification circuit and the second verification circuit are disabled until the second sensing operation is completed.

7. The method of claim 4 , wherein storing the valid data further includes:
sequentially storing the second valid data units in the buffer based on the plurality of second data units before one of the plurality of second data units is determined as an invalid data unit; and
sequentially storing first valid data units in the buffer based on the plurality of first data units starting from a first data unit corresponding to the one of the plurality of second data units determined as the invalid data unit.

8. The method of claim 3 , wherein storing the valid data includes:
sequentially storing first valid data units based on the first data units determined as valid data units; and
sequentially storing second valid data units based on the second data units corresponding to the first data units determined as invalid data units.

9. The method of claim 8 , wherein the first verification circuit and the second verification circuit are enabled simultaneously such that the dump-down operation with respect to the first valid data units and the dump-down operation with respect to the second valid data units are performed alternatively.

10. The method of claim 8 , wherein the first verification circuit is enabled first and the second verification circuit is enabled after the first verification circuit is disabled such that the dump-down operation with respect to the second valid data units is performed after the dump-down operation with respect to the first valid data units is completed.

11. The method of claim 1 , wherein the first sensing operation and the second sensing operation start simultaneously such that the first sensing operation and the second sensing operation are completed simultaneously.

12. The method of claim 1 , wherein the first sensing operation starts in advance before the second sensing operation starts such that a completion time point of the first sensing operation precedes a completion time point of the second sensing operation.

13. The method of claim 1 , wherein the dump-down operation starts at a completion time point of the second sensing operation.

14. The method of claim 1 , wherein the dump-down operation starts at a completion time point of the first sensing operation.

15. A method of controlling initialization of a nonvolatile memory device, the nonvolatile memory device comprising a memory cell region including a first metal pad and a peripheral circuit region including a second metal pad and vertically connected to the memory cell region by the first metal pad and the second metal pad, the method comprising:
performing a first sensing operation to sense a write setting data stored in first memory cells in the memory cell region of a first memory plane and store first read setting data in a first page buffer circuit in the peripheral circuit region of the first memory plane;
performing a second sensing operation to sense the write setting data stored in second memory cells in the memory cell region of a second memory plane and store second read setting data in a second page buffer circuit in the peripheral circuit region of the second memory plane;
verifying validity of each of a plurality of first data units using a first verification circuit connected to the first page buffer circuit, the plurality of first data units corresponding to the first read setting data divided by a unit bit number;
verifying validity of each of a plurality of second data units using a second verification circuit connected to the second page buffer circuit, the plurality of second data units corresponding to the second read setting data divided by the unit bit number;
selectively enabling the first verification circuit and the second verification circuit based on a validity verification result of each of the plurality of first data units and a validity verification result of each of the plurality of second data units; and
storing a valid data unit corresponding to one of a first data unit and a second data unit in a buffer based on the validity verification result of each of the plurality of first data units and the validity verification result of each of the plurality of second data units.

Assignees

• Samsung Electronics Co Ltd

Inventors

• Shin Jiyeon
• Nam Sangwan
• Park Sangwon

Classifications

• G11C7/20

  Memory cell initialisation circuits, e.g. when powering up or down, memory clear, latent image memory · CPC title

• G11C16/10

  Programming or data input circuits · CPC title

• G11C16/0483

  comprising cells having several storage transistors connected in series · CPC title

• G11C16/26 Primary

  Sensing or reading circuits; Data output circuits · CPC title

• G06F11/167

  Error detection by comparing the memory output · CPC title