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TSMC LOD introduction
1. What is LOD effect ?
LOD means “Length of OD region”. LOD effect shows
that devices with different LOD sizes will have different
electrical characteristics.
2. What is the impact of LOD effect on device performance ?
LOD effect is due to stress at STI edge. It mainly changes the mobility
of the devices. And sometimes it might also cause threshold voltage
shift in some special cases. Note that the influence of LOD on NMOS
and PMOS might be different.
3. What is the influence of LOD effect on circuit design ?
Designers might have to take LOD size into consideration in addition to
W and L. It is especially important for post-layout simulation. So far there
have been various simulators and layout extraction tools which could
facilitate the whole procedure.
[ 本帖最后由 littlej 于 2008-12-13 21:28 编辑 ] |
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