Hi Bonnie!
I believe the study that you're looking for is at:
http://pcbwizards.com/CMAP%20Hillman%20paper.zip
It's a 14.5 mb zipped *.doc file, so be patient...
-Steve Gregory-
-----Original Message-----
From: DesignerCouncil [mailto:[log in to unmask]] On Behalf Of
Brown, Bonnie
Sent: Tuesday, May 30, 2006 2:16 PM
To: [log in to unmask]
Subject: Re: [DC] ROHS Components in a HASL design
Ioan,
Would you have a link to the study by Rockwell-Collins about premature
failures on lead-free BGA's soldered with leaded paste? Our
manufacturing partner is insisting that the 2000 pieces they've just
accidentally processed with lead-free BGA's and leaded paste x-ray fine;
but I have my doubts on long-term reliability based on their processing
temperature profile which barely touches 217 degrees C for about 30
secounds.
Thank-You,
Bonnie Brown
Sr. PCB Designer
Inter-tel Integrated Systems
Chandler, AZ
(480) 961-9000 Ext. 21272
-----Original Message-----
From: DesignerCouncil [mailto:[log in to unmask]] On Behalf Of
Tempea, Ioan
Sent: Tuesday, May 30, 2006 10:50 AM
To: [log in to unmask]
Subject: Re: [DC] ROHS Components in a HASL design
Allen,
there is almost no issue with RoHS components on HASL soldered with
leaded paste. Most components have been RoHS for a long time, one
example would be the connectors with golden pins. So no worry, unless we
are talking BGAs. There is a study by Rockwell-Collins showing premature
failures on the lead-free BGAs soldered with leaded paste.
Regards,
Ioan
-----Original Message-----
From: DesignerCouncil [mailto:[log in to unmask]]On Behalf Of Allen
Maddox
Sent: Tuesday, May 30, 2006 1:35 PM
To: [log in to unmask]
Subject: [DC] ROHS Components in a HASL design
Has anyone done any investigation on solder joints or what ever effects
happen with ROHS components in a HASL PCB and assembly process?
Just curious about what happens to those who are exempt from ROHS.
Thanks,
Allen Maddox, CID+
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