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March 2004

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Subject:
From:
"Morse, Carrie" <[log in to unmask]>
Reply To:
TechNet E-Mail Forum.
Date:
Wed, 31 Mar 2004 15:43:01 -0500
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Thanks for the Info Werner.
 

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Werner Engelmaier
Sent: Wednesday, March 31, 2004 3:39 PM
To: [log in to unmask]
Subject: Re: [TN] Voids in Thru-Hole Solder Joints

Hi Carrie,
1. The causes of voids in SJs are many--moisture, flux/paste volatiles,
wave process, etc.
2. Voids in a PTH-SJ typically have no significant reliability
consequence
unless they contain chemicals that attack the surrounding metal.
Mechanically,
the component lead provides excellent connectivity retundancy.
3. Ideally, there are no voids--to my knowledge thare is no spec.

Regards,
Werner Engelmaier
Engelmaier Associates, L.C.
Electronic Packaging, Interconnection and Reliability Consulting
7 Jasmine Run
Ormond Beach, FL 32174 USA
Phone: 386-437-8747, Fax: 386-437-8737
E-mail: [log in to unmask], Website: www.engelmaier.com

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