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Date: | Mon, 20 Jun 2011 08:44:19 -0400 |
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Hi Mordechai,
Sorry I didn't get your photos posted last week, but I have them up now.
Hopefully there will be someone on the list that can offer some input.
http://stevezeva.homestead.com/x-section_1.jpg
http://stevezeva.homestead.com/X-section_2.jpg
Steve
From: Mordechai Kirshenbaum [mailto:[log in to unmask]]
Sent: Wednesday, June 15, 2011 9:10 PM
To: Steve Gregory
Subject: Have you seen this?
Hi Steve
Attached 2 photos of a PCB coupon micro section.
Please post them in your web site.
The A+B coupon (as defined by IPC 2221) is from a 10 layer PCB
with 2 oz copper layers.
The first photo (x-section 1.jpg) is from 2 copper layers adjust to a via
PTH.
as you can note the dielectric thickness changes significantly.
The second photo (x-section 2.jpg) is from a region between 2 vias.
Have you seen similar pictures?
What is the reliability impact?
Best regards
Mordechai Kirshenbaum
MOD, Israel
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