Electronics Forum | Thu Jan 27 14:49:53 EST 2000 | Glenn Robertson
Tuan - One of the reasons I suggested pre-tinning (aside from the negative effects of Gold on appearance and reliability) is the known slower wetting of Sn/Ag and Sn/Cu alloys as compared to Sn/Pb. If you don't have to be Lead-free, the high Lead
Electronics Forum | Mon Dec 05 15:42:37 EST 2005 | les
Anyone with definitive reliability data on mixing thru hole lead free terminations (SAC and Sn/Cu) with Sn/Pb solder. Seems like a lot of conflicting information
Electronics Forum | Tue Jul 24 03:26:45 EDT 2001 | winnifred
Dr. Lee, For lead-free wave soldering, we are recommended to use SnCu0.7, why not 0.8 or more ?? Since SnCu0.7 has eutectic melting point at 227 deg C, does it mean with more Cu or less Cu, the melting point will be higher ?? Also, in lead solderin
Electronics Forum | Tue May 31 10:44:16 EDT 2005 | Scott B
We have found that when the HASL thickness is less than 5 microns the tin in the HASL reacts with the copper leaving a SnCu surface with poor solderability and microscopic grainy Pb islands. The IPC does not specify minimum HASL thickness but we now
Electronics Forum | Thu Oct 01 16:56:40 EDT 2009 | gplume
Does anyone out there have experience soldering with Pb solder (Sn 63 or Sn 62) to SAC 305 coated PCB lands (about 50um) or Sn-Cu plated lands (about 10um). I know soldering Pb free (Sac based soler) to Pb/Sn coated lands is a no-no, but was waonderi
Electronics Forum | Sun Nov 05 23:01:53 EST 2006 | Sxsxcx
ok, sorry ,750 was deg F and which I said 350~400 were deg C, I got a mistake. As I know, we use 660~720 deg F to do reworking for lead free solders such as SAC series and SnCu0.7 series solder to protect irons and components on boards. when temp.
Electronics Forum | Tue Aug 22 16:22:37 EDT 2000 | Dr. Ning-Cheng Lee
There are certainly many pb-free options being considered by the industry. Currently, the most promising alloys appear to be various combinations of SnAgCu. SnAgBi could also be an option, but to use this alloy, there must be no Pb in the surface f
Electronics Forum | Fri Apr 15 10:47:09 EDT 2005 | patrickbruneel
Dhanish, If I understand correct your ICT doesn't detect shorts and only measures capacitive and resistive values. The webbing as Ken mentioned would have a resistance because this is caused by a lack of flux and the web is mainly tin oxide, which w
Electronics Forum | Mon Mar 07 09:14:04 EST 2005 | Rob
Hi does anyone have any experience of running Sn 99 Cu0.7 Ag 0.3 solder in their waves? Also is there any reliabilty data available? I think it may also be called C7A3. All I can find is a brief mention in a table in IEC 61190-1-3 2004, and on a pr
Electronics Forum | Fri Oct 02 11:23:08 EDT 2009 | floydf
Does anyone out there have experience soldering > with Pb solder (Sn 63 or Sn 62) to SAC 305 coated > PCB lands (about 50um) or Sn-Cu plated lands > (about 10um). I know soldering Pb free (Sac based > soler) to Pb/Sn coated lands is a no-no, but
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