Electronics Forum | Thu Nov 03 13:35:46 EST 2005 | Amol
the copper forms intermetallics with tin to get Cu3Sn and Cu6Sn5. thus intermetallics formation consumes Cu and depends upon the cooling rate, faster the cooling rate, lesser the intermetallic formation
Electronics Forum | Wed Sep 03 07:43:13 EDT 2008 | davef
What do you mean by a "few micron thick"? IMC thickness pre-cycling (NEMI Lead-free) * Cu3Sn: 3um [118 uin] * Cu6Sn5: 1um [40 uin]
Electronics Forum | Sun Sep 13 09:21:26 EDT 2009 | davef
You as, "What data is available showing the long term reliability of the intermetallics of the solder joints?" Alloy||Microstructure Sn-Pb||Lamella or globules Sn-Cu||Sn-matrix, Cu6Sn5 needles or globules Sn-Cu-Sb||Sn-matrix, cuboids of SbSn and Cu6
Electronics Forum | Mon Apr 16 11:58:07 EDT 2007 | cingsman
I believe SAC305 will result in a lesser amount of Ag3Sn inter-metallic compounds being formed along the joint boundary and in the sphere. Studies have been shown to point out a significant difference between the number and size of Ag3Sn plates in SA
Electronics Forum | Wed Sep 03 16:59:13 EDT 2008 | glennster
At a former employer we required HASL thicknes to be a minimum of 0.75 micron (30 microinches), as measured at the thinnest point on any given pad. This would generally assure a minimum 1 year solderability shelf life. Usually when we saw a soldera
Electronics Forum | Thu Aug 20 15:10:21 EDT 2009 | davef
Responding to your points: * The intermettalic layers [ie, Cu6Sn5, Cu3Sn] between the solder and the copper pad is the same composition with both lead free and leaded solder. The lead in solder has no impact on the intermetallic. * As you say, increa
Electronics Forum | Mon Aug 23 11:27:00 EDT 1999 | Dave F
0.6 �m (25 micro inches) and self-limit around 5 mils depending on the material being plated and the process. Similarly with white tin, laminates with cleaned copper are immersed in a series of tin baths without an external source of electric curren
Electronics Forum | Tue May 05 15:45:37 EDT 1998 | Dave F
| Looking to buy used or new tubes, that will fit an SOIC-16 | Need these tubes ASAP. We need to bake these parts and drypack. | Please email or call if you can help. | Eric Jenkins | 801 956-0897 Eric I'm not sure of the manufacturer of the parts th
