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raju3295
Joined: 04 Jan 2007
Posts: 77
Helped: 2
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 27 Aug 2008 8:26 what is the process variation means in PVT |
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hi in many .libs i see the value for Process as 1,, wht is th process variation means , what factors this depends and what r the effects of process variation,
can any one post thier inforamtion about this
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jbeniston
Joined: 05 May 2005
Posts: 85
Helped: 8
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| 27 Aug 2008 12:56 what is the process variation means in PVT |
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| Process variation is the difference due to manufacturing. i.e. not every die made will be identical. The variation can effect both timing and power. e.g. some die will be faster than others.
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avimit
Joined: 16 Nov 2005
Posts: 415
Helped: 68
Location: Fleet, UK
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| 27 Aug 2008 14:43 Re: what is the process variation means in PVT |
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To be more precise the geometeries as defined in your cell layout won't exactly match the dimensions on silicon after manufacturing. For example if the channel is say defined as 90 nm in the layout, the manufactured device may have anything say from 89nm to 91nm. This is modelled as process variation.
hope it helps,
Kr,
Avi
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raju3295
Joined: 04 Jan 2007
Posts: 77
Helped: 2
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| 28 Aug 2008 5:21 what is the process variation means in PVT |
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| thanks jbeniston, avimit for explanation provided. but can u tell me how we can model the variation,,, i am observing only 1 in all the libs
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