Invention Grant
US07656730B2 Semiconductor memory device with a reference or dummy cell for testing
失效
具有用于测试的参考或虚拟单元的半导体存储器件
- Patent Title: Semiconductor memory device with a reference or dummy cell for testing
- Patent Title (中): 具有用于测试的参考或虚拟单元的半导体存储器件
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Application No.: US12042184Application Date: 2008-03-04
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Publication No.: US07656730B2Publication Date: 2010-02-02
- Inventor: Takeshi Akiyama
- Applicant: Takeshi Akiyama
- Applicant Address: JP Tokyo
- Assignee: Elpida Memory, Inc.
- Current Assignee: Elpida Memory, Inc.
- Current Assignee Address: JP Tokyo
- Agency: Sughrue Mion, PLLC
- Priority: JP2007-056376 20070306
- Main IPC: G11C29/00
- IPC: G11C29/00 ; G11C29/12

Abstract:
A semiconductor memory device includes: memory cells respectively arranged on intersecting points of a plurality of word lines and a plurality of data lines, and respectively having a capacitor for storing data; a sense amplifier provided in between the data lines forming a data line pair so as to amplify an electric potential difference between the data lines and to perform data reading; and a test memory cell arranged on each of the data lines and having a test capacitor with a capacitance value set smaller than the above capacitor, and when performing a test for a memory cell, inversed data of the data to be stored into a target memory cell of a test target is pre-written into the test memory cell.
Public/Granted literature
- US20080219070A1 SEMICONDUCTOR MEMORY DEVICE Public/Granted day:2008-09-11
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