Semiconductor device
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United States of America Patent
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Aug 11, 2015
Grant Date -
Mar 19, 2015
app pub date -
Jan 28, 2014
filing date -
Sep 17, 2013
priority date (Note) -
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Abstract
A semiconductor device according to an embodiment includes a gate wire including a laminated film in which a polysilicon film, a barrier conductive film, and a metal film are laminated in this order; a first contact plug/upper layer wire arranged above the source or the drain; a second upper layer wire arranged above an element isolation region; a second contact plug arranged apart from the second upper layer wire and connecting the metal film and the polysilicon film above a channel region; and a third contact plug formed apart from the polysilicon film in the element isolation region and connecting the second upper layer wire and the metal film. The second contact plug includes a barrier metal in contact with the polysilicon film and the barrier conductive film is made of WN, TaN, or Ta and the barrier metal is made of Ti or TiN.
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