Hi all,

As the component are getting smaller, such as 0602 and
0402 package, do we still must have a 5mm keep out?
Have any stress studies been done on those packages?

Ted
--- John Maxwell <[log in to unmask]> wrote:
> Bob,
> I am the guilty party that established the 5mm rule.
> That was done back
> when I was consulting and was the result of numerous
> cracked capacitors
> around the world. One would think that things have
> gotten better with the
> move to smaller parts but dielectric thickness and
> also shrunk increasing
> crack sensitivity so things are effectively the
> same. Cracked capacitors
> put two kids and my wife through university along
> with paying the rent. Ah
> to be consulting again with the same problems being
> repeated, easy work.
>
> John Maxwell
>
> At 03:20 PM 6/10/2004 -0400, you wrote:
> >I have been given a v-groove score keep out area
> dimension of 1mm from the
> >edge of the groove to the component body; except
> the dimension becomes 5mm
> >for ceramic components. 5mm seems like a very large
> value. Does anybody have
> >experience with this? Is it really necessary to
> keep ceramic components that
> >far from a v-groove score?
> >
> >Thanks.
> >
> >Bob
> >
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