Invention Grant
US08582351B2 Methods and systems for adjusting wordline up-level voltage to improve production yield relative to SRAM-cell stability
有权
用于调整字线上电压的方法和系统,以提高相对于SRAM单元稳定性的产量
- Patent Title: Methods and systems for adjusting wordline up-level voltage to improve production yield relative to SRAM-cell stability
- Patent Title (中): 用于调整字线上电压的方法和系统,以提高相对于SRAM单元稳定性的产量
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Application No.: US12892191Application Date: 2010-09-28
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Publication No.: US08582351B2Publication Date: 2013-11-12
- Inventor: Igor Arsovski , George M. Braceras , Kevin W. Gorman , Robert M. Houle , Harold Pilo
- Applicant: Igor Arsovski , George M. Braceras , Kevin W. Gorman , Robert M. Houle , Harold Pilo
- Applicant Address: US NY Armonk
- Assignee: International Business Machines Corporation
- Current Assignee: International Business Machines Corporation
- Current Assignee Address: US NY Armonk
- Agency: Downs Rachlin Martin PLLC
- Main IPC: G11C11/00
- IPC: G11C11/00

Abstract:
Methods of setting wordline up-level voltage in as-fabricated SRAM. In one example, the method includes determining the relative speed, or strength, of 1) the combination of the pass-gate and pull-down devices and 2) the pull-up devices in the bitcells of the SRAM. These relative strengths are then used to adjust the wordline up-level voltage, if needed, to decrease the likelihood of the SRAM experiencing a stability failure. Corresponding systems are provided for determining the relative strengths of the devices of interest, for determining the amount of up-level voltage adjustment needed, and for selecting and setting the up-level voltage.
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