Semiconductor memory device with a reference or dummy cell...

Details Semiconductor memory device with a reference or dummy cell... Semiconductor memory device with a reference or dummy cell...

2008-03-04

2010-02-02

Robinson, Mark A (Department: 4175)

Static information storage and retrieval

Read/write circuit

Testing

C365S210100, C365S189070, C365S149000

Reexamination Certificate

active

07656730

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.

REFERENCES:
patent: 2005/0063213 (2005-03-01), Jacob et al.
patent: 0759620 (1996-08-01), None
patent: 1143457 (2001-10-01), None
patent: 2004-103119 (2004-04-01), None

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