Pete,
   I really don't have a vendor assessment yet since the boards haven't
been sent back yet. They are shipping today so I'll have to give them
some time to get there and see what the verdict is after that. I've
asked for a Corrective Action report should they find what I identified
as over etch on some trace widths, to less than minimums, so stay
tuned... Also, just to keep it professional and such, one of the parties
that replied to this issue, just happened to be the source of these
boards. At the time I first sent the question though, they were not
aware of my findings. That being said, they are very aware now, that
this is not the kind of thing they want to have going out the door and
in places like this. As you mentioned, traces that may look ugly are not
reject able, however if they go below minimums then that's another
story. Until I have the results of their inspection, I won't know if I
was too critical or indeed on the mark for rejecting them. I'll try to
follow up on the forum when I get the final report.
Later...


-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Pete menuez
Sent: Saturday, February 25, 2006 8:31 PM
To: [log in to unmask]
Subject: Re: [TN] Board etching question for you board shops out there.

Scott,

You've received a number of explanations on the causes of ragged edges,
mousebites, (hungry mice) etc.  What did the vendor say was the cause?
Did
their explanation agree with the comments of this group?

I would also want to know why these boards shipped.  Did the vendor
agree
with you, are there actual violations of the requirements or are you
looking
at poor workmanship issues.  (A rough trace that does not go below the
minimum is not rejectable but is ugly.)

Just my two cents worth,

Pete



>From: Scott Decker <[log in to unmask]>
>Reply-To: TechNet E-Mail Forum <[log in to unmask]>,              Scott
Decker
><[log in to unmask]>
>To: [log in to unmask]
>Subject: [TN] Board etching question for you board shops out there.
>Date: Thu, 23 Feb 2006 12:33:43 -0700
>
>All you board gurus out there, I have a question for you.
>    What are the reason(s) I see traces that look like a mouse has
>nibbled on the copper to etch it, as opposed to acid etching the
copper?
>I'm looking at some boards that look like the resist was put on by a
>drunk with an old marker pen! The vias are not even round and the SMD
>lands have ragged edges also. This shop is off my list from here on out
>and going to be rebuilding some boards due to minimum trace problems
>too, but can anyone tell me what causes the ragged edges like that? I
>understand that specs are looking at averages, which means a high and
>low end of the spectrum. I think I know who put the low numbers into
the
>pot. :-(
>Thanks for any info.
>
>Scott Decker
>AKA: Padmasterson
>Broad Reach Engineering CAE
>Ph. 480-377-0400 Ext. 34
>FAX. 480-968-4597
>Tempe, AZ.
>
>
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