Looks like Vegas... I try to make that show and attend your workshops...
Thank you - Glenn
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Werner Engelmaier /*
Sent: Thursday, November 13, 2008 11:23 AM
To: [log in to unmask]
Subject: Re: [TN] BGA Pad Cratering - PbFree
By the way, Glenn,
you may want to take my workshop in Dallas or Las Vegas-this subject, together with many others, will be discussed.
Werner
Future workshops:
Pb-Free Soldering Processes: Survival, Quality, Reliability-The PROBLEMS, December 8, Dallas, Texas Pb-Free Soldering Processes: Survival, Quality, Reliability-The SOLUTIONS, December 8, Dallas, Texas Solder Joint Reliability: Part 1-Solder Joint Reliability Fundamentals, March 29, Las Vegas Pb-Free Soldering Processes: Survival, Quality, Reliability: The PROBLEMS, March 30, Las Vegas Pb-Free Soldering Processes: Survival, Quality, Reliability: The SOLUTIONS, March 30, Las Vegas
-----Original Message-----
From: Werner Engelmaier /* <[log in to unmask]>
To: [log in to unmask]
Sent: Thu, 13 Nov 2008 11:16 am
Subject: Re: [TN] BGA Pad Cratering - PbFree
Hi Glenn,
Indeed, there are solution options.
First, easiest and most obvious, reduce cooling rate from reflow to 1.5°C/sec or less; Second, use high STII-value (Tg, Td, TE) PCB base materials, however be careful, some of these materials are more brittle; Third, use softer solder alloys (Bi, In); And fourth, to be facetious, use SnPb solders.
Werner
-----Original Message-----
From: Glenn Torrance (gtorranc) <[log in to unmask]>
To: [log in to unmask]
Sent: Thu, 13 Nov 2008 9:00 am
Subject: [TN] BGA Pad Cratering - PbFree
Hi,
Anyone have any luck in mitigating Pad Cratering in the BGAs in a Pbfree process ?
I heard enlarging pad
s might be a consideration.
Thanks in advance,
Glenn
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