Hi Randy & Judy,

Joe & Scott already gave you good advice - looks like you need to dig into
the process and start isolating possible sources (process variations).

I have to agree with Joe some of the circular ones seem to match the glass
fiber diameters.  Inadequate cleaning or Bath contamination and depositing
debris during plating?

Are the spots a combination of voids and debris?

Don't forget to checkout the sample prep process - we started failing solder
float because a new lab tech was submerging the coupons instead of floating
them.  Talk about panic.

And the hole walls look pretty torn up but I have seen worse.

Happy New Year Everybody!

Hans

You can run . . .  but you'll only die tired.
~~~~~~~~~~~~~~~~~~~~~~~~~~~
Hans M. Hinners
Warner Robins Air Logistics Center (WR-ALC)
Robins AFB, GA 31098-1622
Tele: (478) 926 - 5847 [DSN Prefix: 468]
Fax: (478) 926 - 4911
mailto:[log in to unmask]


-----Original Message-----
From: Scott Westheimer [mailto:[log in to unmask]]
Sent: Tuesday, January 07, 2003 11:06 AM
To: [log in to unmask]
Subject: Re: [TN] Small spots on etch line


Randy,

The pictures show that you plated up the inner layers and the copper inner
layers protrude out into the hole wall. Is that from etch back? The pictures
also show that  there are several demarcation lines of plating which would
appear that they were plated several time. Are these bubbles in the first
plating or do you see them at the different layer of copper plating? Can you
please let us know how you processed these boards.
Scott B. Westheimer
General Manager,
Gultech North Carolina
5800 McHines Place
Raleigh, North Carolina 27616
Phone: (919)872-0100
Fax: (919)713-4849
Cell: (919)649-1510
Toll Free: 1-866-gultech
[log in to unmask]
Web Page: www.gultechna.com
----- Original Message -----
From: "Randy" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Tuesday, January 07, 2003 9:39 AM
Subject: Re: [TN] Small spots on etch line


> I have sent pictures to Steve to post on his web site.  There are several
> different pictures with various problems.  If anyone can help with these
it
> would be greatly appreciated!
> Thanks,
> Randy
>
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