Hi Victor,

We see crazing as a major concern when the grid size gets down to .020". It is a condition that occurs frequently with lead free preconditioning 6X260°C.

IMHO, I agree with you.

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] 

 


-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Victor Hernandez
Sent: December 10, 2013 10:14 AM
To: [log in to unmask]
Subject: Re: [TN] Crazing


   I just started to notice more and more laminate crazing around PTHs barrels walls on LF solder and hybrid laminates.   IMHO it is a concern that needs to be address.
Victor,

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Pete
Sent: Tuesday, December 10, 2013 8:42 AM
To: [log in to unmask]
Subject: Re: [TN] Crazing

Back to the microsection validity question - are you sure they aren't trying to say that your microsectioning process caused the crazing, not that it isn't a correct inspection method?

Pete

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