Subject: | |
From: | |
Reply To: | TechNet E-Mail Forum. |
Date: | Wed, 31 Mar 2004 15:39:05 EST |
Content-Type: | text/plain |
Parts/Attachments: |
|
|
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
---------------------------------------------------
Technet Mail List provided as a service by IPC using LISTSERV 1.8e
To unsubscribe, send a message to [log in to unmask] with following text in
the BODY (NOT the subject field): SIGNOFF Technet
To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL)
To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest
Search the archives of previous posts at: http://listserv.ipc.org/archives
Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315
-----------------------------------------------------
|
|
|