Invention Grant
- Patent Title: Dynamic sense node voltage to compensate for variances when sensing threshold voltages of memory cells
-
Application No.: US17166612Application Date: 2021-02-03
-
Publication No.: US11626160B2Publication Date: 2023-04-11
- Inventor: Huiwen Xu , Bo Lei , Jun Wan
- Applicant: SanDisk Technologies LLC
- Applicant Address: US TX Addison
- Assignee: SanDisk Technologies LLC
- Current Assignee: SanDisk Technologies LLC
- Current Assignee Address: US TX Addison
- Agency: Vierra Magen Marcus LLP
- Main IPC: G11C11/34
- IPC: G11C11/34 ; G11C11/56 ; G11C16/04 ; G11C16/26 ; H01L25/065 ; H01L23/00

Abstract:
Technology for sensing non-volatile memory cells in which one or more sense nodes are charged to a sense voltage having a magnitude that improves sensing accuracy. One sense node may be charged to different sense voltages when sensing different memory cells at different times. Multiple sense nodes may be charged to a corresponding multiple different sense voltages when sensing different memory cells at the same time. The one or more sense nodes are allowed to discharge based on respective currents of memory cells for a pre-determined time while applying a reference voltage to the memory cells. The Vts of the selected memory cells are assessed based on respective voltages on the one or more of sense nodes after the pre-determined time. Different sensing voltages may be used based on bit line voltage, bit line resistance, distance of memory cells from the sense node, or other factors.
Public/Granted literature
- US20220246208A1 DYNAMIC SENSE NODE VOLTAGE TO COMPENSATE FOR VARIANCES WHEN SENSING THRESHOLD VOLTAGES OF MEMORY CELLS Public/Granted day:2022-08-04
Information query