Invention Grant
- Patent Title: Memory device which performs verify operations using different sense node pre-charge voltages and a common discharge period
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Application No.: US14849879Application Date: 2015-09-10
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Publication No.: US09721671B2Publication Date: 2017-08-01
- Inventor: Alexander Chu , Jong Hak Yuh , Kwang-Ho Kim , Yenlung Li , Farookh Moogat
- Applicant: SanDisk Technologies Inc.
- Applicant Address: US TX Plano
- Assignee: SanDisk Technologies LLC
- Current Assignee: SanDisk Technologies LLC
- Current Assignee Address: US TX Plano
- Agency: Vierra Magen Marcus LLP
- Main IPC: G11C7/00
- IPC: G11C7/00 ; G11C16/34 ; G11C16/30 ; G11C16/24 ; G11C16/26 ; G11C7/12 ; G11C11/56

Abstract:
Sense circuits in a memory device can be pre-charged to different levels in a sensing process to reduce the amount of time used for sensing. During sensing of first and second memory cells, a control circuit pre-charges first and second sense circuits to first and second voltages, respectively. The first and second sense circuits are associated with the first and second memory cells, respectively. Also, during the sensing, a control gate voltage is applied to the first and second memory cells. The control circuit allows the first and second sense node voltages to discharge in a common discharge period and the cells are sensed using a common trip condition. The first and second memory cells are therefore subject to different concurrent verify tests.
Public/Granted literature
- US20170076812A1 Verify Operations Using Different Sense Node Voltages In A Memory Device Public/Granted day:2017-03-16
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