Subject: | |
From: | |
Reply To: | |
Date: | Mon, 16 Dec 2013 10:02:14 -0800 |
Content-Type: | text/plain |
Parts/Attachments: |
|
|
Now these pictures look different to what I originally thought, saw or
gathered from the discussion.
The first two pictures do make me think the section hit the glass bundles
and exposed them.
The third picture shows metal plated into the glass bundles. Etch back
of the epoxy looks weak and the glass etch excessive allowing the copper
to plate into the glass area.
I have had customers complain of "pink ring" when in fact the problem was
the same, too much glass etch.
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
[log in to unmask] | www.3M.com
This message (including any attachments) may contain material, non-public
information or proprietary information and is for the intended recipients
only. If you are not the intended recipient, you should notify the sender
and delete this message. Any disclosure, copying, or use of this
information is strictly prohibited and may subject you to legal liability.
From: Wayne Thayer <[log in to unmask]>
To: <[log in to unmask]>
Date: 12/13/2013 10:11 AM
Subject: Re: [TN] Crazing - the pictures
Sent by: TechNet <[log in to unmask]>
Hi Paul-
Nice sections.
Aren't they supposed to have the drill actually spin when they push it
through the board?
What's going on with the two layers of plating? That first layer is more
than electroless would normally put down. I guess maybe they checked hole
size reduction to see how much plating they put down, realized they'd
missed a minimum on the hole wall, and put it back into the bath.
I tend to think of the defect you have been talking about as "heavily
damaged fibers", and think of crazing as voids/cracks within the prepreg.
I agree that I would be very concerned about the long term reliability of
these boards and would like to know how much fallout the fabricator had
due to plating shorts along these damaged fibers.
Wayne
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Paul Reid
Sent: Friday, December 13, 2013 12:49 PM
To: [log in to unmask]
Subject: [TN] Crazing - the pictures
Hi Everyone,
I finally found Steve Gregory's email address. He has kindly posted some
the pictures of the crazing that I found.
http://stevezeva.homestead.com/6494_2_1_mod.jpg
http://stevezeva.homestead.com/6494_M_001.jpg
http://stevezeva.homestead.com/6496_2_10.jpg
Sincerely,
Paul Reid
Program Coordinator
PWB Interconnect Solutions Inc.
235 Stafford Rd., West, Unit 103
Nepean, Ontario Canada, K2H 9C1
613 596 4244 ext. 229
Skype paul_reid_pwb
[log in to unmask]
______________________________________________________________________
This email has been scanned by the Symantec Email Security.cloud service.
For more information please contact helpdesk at x2960 or [log in to unmask]
______________________________________________________________________
______________________________________________________________________
This email has been scanned by the Symantec Email Security.cloud service.
For more information please contact helpdesk at x2960 or [log in to unmask]
______________________________________________________________________
______________________________________________________________________
This email has been scanned by the Symantec Email Security.cloud service.
For more information please contact helpdesk at x2960 or [log in to unmask]
______________________________________________________________________
|
|
|