Right on Ed and if there's no quality conformance test circuitry to
x-section, how would anyone know - especially the board shop.

Earl Moon

----- Original Message -----
From: Ed Cosper <[log in to unmask]>
To: <[log in to unmask]>
Sent: Wednesday, September 29, 1999 1:22 PM
Subject: Re: [TN] Hot: Copper plating thickness


> Hi Ken,
>
> Personally, I really don't care what the spec says. I for one would never
> knowingly  ship .0004 of copper to my Customer and surely wouldn't try and
> defend it by using the spec average.  I understand that a hole wall with
> only .0004"  of copper plating ( thin spots ) can be a serious reliability
> concern. It also can manifest itself into blow holes.
>
> Just my opinion.
>
> Ed Cosper
> ABC
>
>
> ----- Original Message -----
> From: Ken Patel <[log in to unmask]>
> To: <[log in to unmask]>
> Sent: Wednesday, September 29, 1999 1:42 PM
> Subject: [TN] Hot: Copper plating thickness
>
>
> > If my requirement for the copper plating is 0.001" minimum (as spelled
out
> > on my fab drawing) and if I am reading it between .0004"-.001", is it
> > rejects or not?. I tried to look at IPC-6012 which is calling out avg
> copper
> > thickness. I don't how easy to get ave #. This is clearly a reject to
me.
> > But I am looking for an expert opinion on the subject. Via Hole in
> question
> > is 16 mil +3 mil / -10 mils.
> >
> > re,
> > ken patel
> > ______________________________________________________
> > Ken Patel                       Phone:  (408) 490-6804
> > 1708 McCarthy Blvd.             Fax:    (408) 490-6859
> > Milpitas, CA 95035              Beeper: (888) 769-1808
> >
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