公开(公告)号：US10049755B2

公开(公告)日：2018-08-14

申请号：US15423629

申请日：2017-02-03

申请人： Heewon Lee ,  Sari Go ,  Seungkyung Ro ,  Seongnam Kwon

发明人： Heewon Lee ,  Sari Go ,  Seungkyung Ro ,  Seongnam Kwon

IPC分类号： G11C16/34 ,  G06F3/06 ,  G11C16/04

摘要： A storage device includes a nonvolatile memory device and a controller. The nonvolatile memory device includes multiple memory blocks, each of which includes memory cells. The controller reads data from selected memory cells of a memory block selected from the memory blocks during a read operation. The selected memory cells correspond to both a word line and a string selection line selected as a read target. The controller increases a read count by a read weight corresponding to the selected word line and string selection line of the selected memory block, and performs a refresh operation on the selected memory cells if the read count reaches a threshold value. In the selected memory block, two or more read weights are assigned according to locations of the string selection lines and the word lines.

公开(公告)号：US20180067697A1

公开(公告)日：2018-03-08

申请号：US15605404

申请日：2017-05-25

申请人： Donghwan Lee ,  Junjin Kong ,  Seongnam Kwon ,  Seungkyung Ro ,  Changkyu Seol ,  Hong Rak Son ,  Pilsang Yoon ,  Donggi Lee ,  Heewon Lee

发明人： Donghwan Lee ,  Junjin Kong ,  Seongnam Kwon ,  Seungkyung Ro ,  Changkyu Seol ,  Hong Rak Son ,  Pilsang Yoon ,  Donggi Lee ,  Heewon Lee

IPC分类号： G06F3/06 ,  G06N99/00

CPC分类号： G06F3/0659 ,  G06F3/061 ,  G06F3/0656 ,  G06F3/0679 ,  G06N99/005 ,  G11C11/5628 ,  G11C11/5642 ,  G11C16/0483

摘要： A storage device may include a nonvolatile memory device, a buffer memory, and a controller. The controller may perform first accesses on the nonvolatile memory device using the buffer memory, collect access result information and access environment information of the first accesses in the buffer memory, and generate an access classifier that predicts a result of a second access to the nonvolatile memory device by performing machine learning based on the access result information and the access environment information collected in the buffer memory.

公开(公告)号：US10013211B2

公开(公告)日：2018-07-03

申请号：US15605404

申请日：2017-05-25

申请人： Donghwan Lee ,  Junjin Kong ,  Seongnam Kwon ,  Seungkyung Ro ,  Changkyu Seol ,  Hong Rak Son ,  Pilsang Yoon ,  Donggi Lee ,  Heewon Lee

发明人： Donghwan Lee ,  Junjin Kong ,  Seongnam Kwon ,  Seungkyung Ro ,  Changkyu Seol ,  Hong Rak Son ,  Pilsang Yoon ,  Donggi Lee ,  Heewon Lee

IPC分类号： G11C7/00 ,  G06F3/06 ,  G06N99/00

CPC分类号： G06F3/0659 ,  G06F3/061 ,  G06F3/0619 ,  G06F3/0656 ,  G06F3/0679 ,  G06N20/00 ,  G11C11/5628 ,  G11C11/5642 ,  G11C16/0483

摘要： A storage device may include a nonvolatile memory device, a buffer memory, and a controller. The controller may perform first accesses on the nonvolatile memory device using the buffer memory, collect access result information and access environment information of the first accesses in the buffer memory, and generate an access classifier that predicts a result of a second access to the nonvolatile memory device by performing machine learning based on the access result information and the access environment information collected in the buffer memory.

公开(公告)号：US20180004415A1

公开(公告)日：2018-01-04

申请号：US15423629

申请日：2017-02-03

申请人： HEEWON LEE ,  SARI GO ,  SEUNGKYUNG RO ,  SEONGNAM KWON

发明人： HEEWON LEE ,  SARI GO ,  SEUNGKYUNG RO ,  SEONGNAM KWON

IPC分类号： G06F3/06 ,  G11C16/10 ,  G11C16/16 ,  G11C16/04 ,  G11C16/34 ,  G11C16/26

CPC分类号： G11C16/3418 ,  G06F3/0679 ,  G11C7/04 ,  G11C16/0483 ,  G11C16/26 ,  G11C16/3422 ,  G11C16/3427 ,  G11C16/3431 ,  G11C16/349 ,  G11C16/3495

摘要： A storage device includes a nonvolatile memory device and a controller. The nonvolatile memory device includes multiple memory blocks, each of which includes memory cells. The controller reads data from selected memory cells of a memory block selected from the memory blocks during a read operation. The selected memory cells correspond to both a word line and a string selection line selected as a read target. The controller increases a read count by a read weight corresponding to the selected word line and string selection line of the selected memory block, and performs a refresh operation on the selected memory cells if the read count reaches a threshold value. In the selected memory block, two or more read weights are assigned according to locations of the string selection lines and the word lines.