US 12,190,934 B2
Memory with row hammer mitigation technique
Woongrae Kim, Gyeonggi-do (KR); and Hoiju Chung, San Jose, CA (US)
Assigned to SK hynix Inc., Gyeonggi-do (KR)
Filed by SK hynix Inc., Gyeonggi-do (KR)
Filed on Mar. 25, 2022, as Appl. No. 17/704,714.
Claims priority of provisional application 63/282,553, filed on Nov. 23, 2021.
Prior Publication US 2023/0162776 A1, May 25, 2023
Int. Cl. G11C 11/406 (2006.01); G11C 11/4076 (2006.01)
CPC G11C 11/40615 (2013.01) [G11C 11/4076 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A memory comprising:
a memory core;
a list storage circuit suitable for storing a weak row list that includes a list of rows that have been determined to be more vulnerable to a row hammer attack and data loss, as compared to other rows in the memory core also row hammered attacked, wherein the rows more vulnerable to the row hammer attack are divided into multiple levels according to a degree of vulnerability; and
a row hammer attack detection circuit suitable for selecting rows that are row-hammer-attacked among rows in the memory core as hammered rows,
wherein the row hammer attack detection circuit increases a probability that the rows in the list of rows that have been determined to be more vulnerable to a row hammer attack and data loss in the list storage circuit are selected as the hammered rows.