Invention Grant
- Patent Title: Variable resistance non-volatile memory device
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Application No.: US16957830Application Date: 2018-12-05
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Publication No.: US11062772B2Publication Date: 2021-07-13
- Inventor: Reiji Mochida , Kazuyuki Kouno , Takashi Ono , Masayoshi Nakayama , Yuriko Hayata
- Applicant: PANASONIC CORPORATION
- Applicant Address: JP Osaka
- Assignee: PANASONIC CORPORATION
- Current Assignee: PANASONIC CORPORATION
- Current Assignee Address: JP Osaka
- Agency: McDermott Will and Emery LLP
- Priority: JPJP2017-255138 20171229
- International Application: PCT/JP2018/044775 WO 20181205
- International Announcement: WO2019/131025 WO 20190704
- Main IPC: G11C13/00
- IPC: G11C13/00

Abstract:
A variable resistance non-volatile memory device includes a memory cell array including memory cells, a write circuit, and a control circuit. Each memory cell includes a memory element that is a non-volatile and variable-resistance memory element, and a cell transistor. The write circuit includes a source line driver circuit connected to the cell transistor and a bit line driver circuit connected to the memory element. When performing a write operation of changing the memory element to a low resistance state, the control circuit performs control for allowing current having a first current value to flow through the memory element, and subsequently performs control for allowing current having a second current value to flow through the memory element. The second current value is greater than the largest value of overshoot current flowing through the memory element after the start of the changing of the memory element to the low resistance state.
Public/Granted literature
- US20210065795A1 VARIABLE RESISTANCE NON-VOLATILE MEMORY DEVICE Public/Granted day:2021-03-04
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