US 12,266,407 B2
Conditional valley tracking during corrective reads
Tomoharu Tanaka, Kanagawa (JP); James Fitzpatrick, Laguna Niguel, CA (US); Huai-Yuan Tseng, San Ramon, CA (US); Kishore Kumar Muchherla, San Jose, CA (US); Eric N. Lee, San Jose, CA (US); David Scott Ebsen, Minnetonka, MN (US); Dung Viet Nguyen, San Jose, CA (US); and Akira Goda, Tokyo (JP)
Assigned to Micron Technology, Inc., Boise, ID (US)
Filed by Micron Technology, Inc., Boise, ID (US)
Filed on Apr. 18, 2023, as Appl. No. 18/135,915.
Claims priority of provisional application 63/332,401, filed on Apr. 19, 2022.
Prior Publication US 2023/0335201 A1, Oct. 19, 2023
Int. Cl. G11C 7/00 (2006.01); G11C 16/08 (2006.01); G11C 16/10 (2006.01); G11C 16/26 (2006.01)
CPC G11C 16/26 (2013.01) [G11C 16/08 (2013.01); G11C 16/102 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A memory device comprising:
a memory array comprising:
a set of target cells connected to a target wordline;
at least one wordline adjacent to the target wordline; and
for each target cell of the set of target cells, a respective group of adjacent cells adjacent to the target cell, wherein each group of adjacent cells comprises at least one cell connected to the at least one wordline; and
control logic, operatively coupled with the memory array, to perform operations comprising:
causing a read operation to be initiated with respect to the set of target cells;
obtaining, for each group of adjacent cells, respective cell state information;
assigning, based on the respective cell state information, each target cell of the set of target cells to a respective state information bin of a set of state information bins, wherein each state information bin is associated with a respective group of target cells of the set of target cells; and
determining a set of calibrated read level offsets, wherein each calibrated read level offset of the set of calibrated read level offsets is associated with a respective state information bin of the set of state information bins.