Wiring structure
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United States of America Patent
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Issued Date -
Jan 29, 2004
app pub date -
Jan 24, 2003
filing date -
Jul 26, 2002
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
The present invention protects a wiring against an etchant when a fuse connected to this wiring is subjected to a laser blow. A fuse has a barrier metal at its lower side. A plug is connected to the lower side of the fuse. The plug has a barrier metal at least at its lower side. Even if the fuse is partly removed through the laser blow at a region other than a portion where the fuse is connected to the plug, two layers of the barrier metals remain between the removed portion and a lower wiring. This enlarges the margin for preventing the adverse influence, such as corrosion and breaking of the lower wiring, brought by an etchant associated in other manufacturing process.
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