Invention Grant
- Patent Title: Balanced method for programming multi-layer cell memories
- Patent Title (中): 用于编程多层单元存储器的平衡方法
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Application No.: US13051885Application Date: 2011-03-18
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Publication No.: US08934292B2Publication Date: 2015-01-13
- Inventor: Xiying Costa , Yibo Nian , Roy Scheuerlein , Tz-Yi Liu , Chandrasekhar Reddy Gorla
- Applicant: Xiying Costa , Yibo Nian , Roy Scheuerlein , Tz-Yi Liu , Chandrasekhar Reddy Gorla
- Applicant Address: US CA Milpitas
- Assignee: SanDisk 3D LLC
- Current Assignee: SanDisk 3D LLC
- Current Assignee Address: US CA Milpitas
- Agency: The Marbury Law Group PLLC
- Main IPC: G11C11/00
- IPC: G11C11/00 ; G11C13/00 ; G11C11/56

Abstract:
Improved methods for programming multi-level metal oxide memory cells balance applied voltage and current to provide improved performance. Set programming, which transitions the memory cell to a lower resistance state, is accomplished by determining an appropriate programming voltage and current limit for the objective resistance state to be achieved in the programming and then applying a pulse having the determined set electrical characteristics. Reset programming, which transitions the memory cell to a higher resistance state, is accomplished by determining an appropriate programming voltage and optionally current limit for the state to be achieved in the programming and then applying a pulse having the determined electrical characteristics. The algorithm used to determine the appropriate set or reset programming voltage and current values provides for effective programming without stressing the memory element. The electrical characteristics for programming pulses may be stored in a data table used in a table look up algorithm.
Public/Granted literature
- US20120236624A1 Balanced Method for Programming Multi-Layer Cell Memories Public/Granted day:2012-09-20
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