Is it a sticker sheet issue?

Victor,

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Steve Gregory
Sent: Monday, June 20, 2011 7:44 AM
To: [log in to unmask]
Subject: [TN] Have you seen this?

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

[log in to unmask]

 

 

 

 



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