or something that retards the copper plate up.
Not necessarily a problem, not pretty but not a problem if the hole walls 
are good.

If you section is the copper plate height requirement met?  If yes and 
they passed E test then they are good.

Did you get a micro section report with your certs?  Again, good micro 
section, good e test they are good,
Hole walls have etch out, not so good.

that's my 2 cents,
Chuck


Charles W. Brummer | 3M Manufacturing Engineer
3M Electronic Solutions Division
3M Canoga Park, 8357 Canoga Ave. | Canoga Park, CA 91304
Office: 818 734 4930
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From:   "Steve Gregory" <[log in to unmask]>
To:     <[log in to unmask]>
Date:   07/15/2015 07:17 AM
Subject:        [EXTERNAL] Re: [TN] MYSTRY DEFECT
Sent by:        TechNet <[log in to unmask]>



Hi Ong Seet Leng,

I got your photos and have them posted now, the links are here:

http://stevezeva.homestead.com/Mystery_Defect_1.jpg

http://stevezeva.homestead.com/Mystery_Defect_2.jpg

Looks like there was some sort of problem with the etch resist, can't say
exactly what that was though. I definitely would be kicking these back to
the vendor!

Steve

On Tue, Jul 14, 2015 at 2:15 AM, Ong Seet Leng <[log in to unmask]> 
wrote:

> Afternoon,
>
> I had checked a bare printed wiring board and attached a photograph on 
one
> of the defect found. I would like to seek advice from you gurus' out 
there
> on what to call this defect? For the life of me, I can't find the
> definition of it. Appreciate if someone can guide me. Thanks in advance.
>
> Regards,
> Ong Seet Leng
>
>
>
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