helenpenghan
Newbie level 4
Antenna check errors in IBM. Need help!
I am using IBM cmrf6sf 3 metal technology for the layout. When doing assura floating gate check for my complete circuit, there are lots of errors as:
GR908, There are floating AM//ML/MA of pads.
GR131: There are metal/(gate+15*tie-down)>200 areas at AM/ML level.
GR131: There are metal/(gate+15*tie-down)>200 areas at MT level.
GR131a:There are floating gates to MT touching (AV/FT/FTbar) not tie down.
GR131: There are floating ANALOGgates not tied down at first metal level.
And I also checked floating gate for my individual cells. There are still erros of:
GR131: There are floating ANALOGgates not tied down at first metal level.
pointing to most of transistor gates, but not all of them. I do not know what cause the problem and even a basic inverter layout has such errors.
Could anyone tell me how to solve them? Thanks a lot.
I am using IBM cmrf6sf 3 metal technology for the layout. When doing assura floating gate check for my complete circuit, there are lots of errors as:
GR908, There are floating AM//ML/MA of pads.
GR131: There are metal/(gate+15*tie-down)>200 areas at AM/ML level.
GR131: There are metal/(gate+15*tie-down)>200 areas at MT level.
GR131a:There are floating gates to MT touching (AV/FT/FTbar) not tie down.
GR131: There are floating ANALOGgates not tied down at first metal level.
And I also checked floating gate for my individual cells. There are still erros of:
GR131: There are floating ANALOGgates not tied down at first metal level.
pointing to most of transistor gates, but not all of them. I do not know what cause the problem and even a basic inverter layout has such errors.
Could anyone tell me how to solve them? Thanks a lot.
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