Well may be the inspectors need a bit of training... Proper work is only
done with either great luck (which is not reliable) or just plain old
training. Besides "not every reject is a defect and not every defect is a
reject". You have to review doubtful situations. Advise inspectors, in a
written format, of any changes you want done to their inspection methods.
Writing your own internal inspection documentation might not be a bad idea
either.

Alain Savard, B.Sc.
Chemical Process Analyst
CAE Electronics Ltd.
e-mail: [log in to unmask]

-----Original Message-----
From: Howieson, Rick
To: [log in to unmask]
Subject: Re: [TN] PE: PCB Inspection

Alain,
Couldn't help but respond to your comment on toys vs hi-rel. We build
space flight boards and very few (i.e. majority) of the receiving
inspectors have a clue to what they are inspecting. You would be amazed
of the 101 reasons I've seen to reject a board. Just a sample, "thermal
pads called etching shorts". Nuff said.
Rick

>-----Original Message-----
>To:    [log in to unmask]
>Subject:       Re: [TN] PE: PCB Inspection
>
>Incoming inspection may be required in some instances... It all depends on
>the reliability you require for the boards. I don't think that most company
>dealing with high reliability products will dock-to-stock as eagerly as
>throw-away manufacturer. It also depends on assembly value, sometimes
>inspection may reduce headaches down the road. I've seen board burn in the
>past. These were supp0sed to be excellent board by the CoC... turned out
>they weren't that good.
>
>All processes, no matter what have to make sense. Gather data if and when
>possible. Keep your eyes open. I don't think that the people dealing with
>cheap assemblies, like most toys, are playing in the same ball park as
>people dealing high reliability medical or space equipment.
>
>Alain Savard, B.Sc.
>Chemical Process Analyst
>CAE Electronics Ltd.
>e-mail: [log in to unmask]

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