Semiconductor device
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United States of America Patent
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Nov 11, 2003
Issued Date -
N/A
app pub date -
Dec 20, 2002
filing date -
May 26, 2000
priority date (Note) -
Expired
status (Latency Note)
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Abstract
In the conventional column-side block redundancy for DRAM, competition for the replacing regions occurs unless a repair address of a large number of bits is stored in order to replace with a small replacement unit. According to one aspect of the invention, replacement decision is performed in order that a second replacement region can be made smaller than a first replacement and that the second replacement is given priority over the first replacement. Therefore, the first replacement can be controlled by a repair address of a small number of bits, thus making it possible to achieve a semiconductor device having a defect repair circuit with small area and high repair efficiency.
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