Invention Grant
- Patent Title: Programming time improvement for non-volatile memory
- Patent Title (中): 非易失性存储器的编程时间改进
-
Application No.: US14286844Application Date: 2014-05-23
-
Publication No.: US08854890B1Publication Date: 2014-10-07
- Inventor: Hitoshi Miwa
- Applicant: SanDisk Technologies Inc.
- Applicant Address: US TX Plano
- Assignee: SanDisk Technologies Inc.
- Current Assignee: SanDisk Technologies Inc.
- Current Assignee Address: US TX Plano
- Agency: Vierra Magen Marcus LLP
- Main IPC: G11C16/04
- IPC: G11C16/04 ; G11C16/24 ; G11C16/12 ; G11C16/10

Abstract:
Disclosed herein are techniques for providing a programming voltage to a selected word line in a non-volatile memory array. This may be a 3D NAND, 2D NAND, or another type of memory array. The programming voltage may be quickly ramped up on the selected word line, without the need for adding a stronger charge pump to the memory device. The voltage on the selected word line may be ramped up to a target voltage during a channel pre-charge phase. The target voltage may be limited in magnitude so that program disturb does not occur. Next, during a channel boosting phase, the unselected word lines are increased to a boosting voltage. The voltage on the selected word line is also increased during the boosting phase to a second target level. Then, the voltage on the selected word line is charged up from the second target level to a program voltage.
Information query