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Reply To: | TechNet E-Mail Forum. |
Date: | Thu, 27 Jul 2000 09:56:57 -0500 |
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Hans,
I'd agree that the large delamination may be a result of the routing
process, but the smaller laminate voids immediately above and below the
large delamination look like real laminate voids to me. Also, if that copper
is 1 oz, it looks like the laminate voids exceed the 0.08mm limit for class
2 and 3.
To avoid this kind of messy question, I like to make the edge of my coupons
right through the middle of a hole. That way, the outside holes can be
discounted, but anything inside of them is fair game.
David V. Smith
QA/FA Lab Technician
Benchmark Electronics, Inc.
Direct: (507) 453-4892
[log in to unmask] <mailto:[log in to unmask]>
-----Original Message-----
From: Hinners Hans Civ WRALC/LYPME
[mailto:[log in to unmask]]
Sent: Wednesday, July 26, 2000 3:42 PM
To: [log in to unmask]
Subject: [TN] IPC-A-600F Section 3.1.1 Define Zone B
Delamination
Hi All,
Interesting discussion going on in our Inspection area
regarding IPC-A-600F
Section 3.1.1.
Is the outer edge of the coupon considered Zone B?
I think of Zone B being between the holes and nowhere else
but hadn't really
thought on it until now. We have a laminate void that
(probably)
contributed to a delamination when the coupon was routed.
The Inspectors
are gonna pull another coupon tomorrow but I'm interested in
what y'all have
to say.
Here's a pic "lam void.jpg"
<http://www.driveway.com/share?sid=a8f3cb1d.96df8&name=Pictures>
(If this picture is viewable then Friday ought to be another
Steve Day!)
I look forward to everyone's replies over my morning coffee.
Hasta!
Hans
~~~~~~~~~~~~~~~~~~~
Hans M. Hinners
Materials (Process & Manufacturing) Engineer
Warner Robins Air Logistics Center
Avionics Production Division
Manufacturing Branch
380 Second Street, Suite 104
Building: 640, Mail Stop: LYPME
Robins AFB, GA 31098-1638
Voice: (912) 926 - 1970 Fax: (912) 926 - 7164
mailto:[log in to unmask]
http://www.robins.af.mil
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