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Reply To: | TechNet E-Mail Forum. |
Date: | Wed, 15 Mar 2000 08:07:24 -0600 |
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Yes, if your master is designed at 6 mil, your vendor can have overall width down to 4.8 mils and isolated reductions down to 3.8 mils. If this will affect function, you need to specify a 6 mil minimum on your drawing. Your vendor will hopefully ask to increase their production artwork.
>>> [log in to unmask] 03/14/00 04:27pm >>>
It's a good question, I think you just misunderstood it.
Say I design a board with 6 mil minimum traces,
but I have routed the IC power at 10mils.
Is anyone saying I should accept 20% less than 6mils on those traces?
I don't think so....
-----Original Message-----
From: Howieson, Rick [mailto:[log in to unmask]]
What part of the minimum value is misunderstood? If the
requirement
states minimum 10 mils WHY are you making it 11???
Rick
>-----Original Message-----
>From: Franklin Asbell [SMTP:[log in to unmask]]
>
>Keep in mind how that is worded. The requirement say's
"...20% of the
>minimum value, or less."
>
>Now if the artwork require a minimum trace width of let's
say 10 mils, and
>you make the trace 11 mils, the 11 mils trace is reduce by
21%, would this
>be rejectable in accordance with A-600? Or would the
minimum value (i.e. 10
>mils plus or minus the allowable tolerance) be the starting
point to
>subtract 20%?
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