Electronics Forum | Tue Jan 23 17:16:07 EST 2007 | darby
Check out the web sites of the major solder manufacturers. From a quick glance most of the pastes around that temperature range have problems with Zn content and may not be available as pastes???? Depending on your application, some of the lower melt
Electronics Forum | Tue May 03 20:01:24 EDT 2011 | city4497s
It a recent occurance and it happen randomly on other area. I'm using senju M705-GRN360-KV and Indium SMQ 90 Leadfree solder paste, we have been using both paste for 4~5 years. We have asked the oven supplier to perform maintenance and inspection, pr
Electronics Forum | Wed Apr 28 22:35:32 EDT 2004 | davef
We can clean the blank out of LARGE BGA. [Cleaning small BGA is a whoooole nuther issue.] But before we get into that, what's the problem and its breadth? Why are you getting poor wetting? What's the story on the components, board, process materia
Electronics Forum | Tue Jan 23 16:28:14 EST 2007 | Jim
If by any chance you happen to find one, please let me know.
Electronics Forum | Tue Jan 23 16:53:45 EST 2007 | patrickbruneel
Can not be done without drastic alterations to the laws of physics Patrick
Electronics Forum | Tue Jan 23 19:27:28 EST 2007 | asir
which characteristics? An alloy with similar melting points, wetting, shear force, reliabilities, etc. Indium has an article about 77.2Sn/20.0In/2.8Ag, but was wondering is there any other out there.
Electronics Forum | Fri Apr 29 08:28:17 EDT 2011 | markhoch
Is it possibly being caused by surface contaminants on your PCB? Or possibly flux residue? Is this a one time occurance, or are you seeing it regularly? Is it happening in other areas on your PCB or in just this location? Can you please provide more
Electronics Forum | Tue Nov 21 12:35:59 EST 2006 | CK the Flip
It probably depends on the Silver content. We are also using Sn62Pb36Ag2. The paste manufacturer told us that the reason for the small silver content was so that it could wet better to the lead-free component and board finishes bearing silver.
Electronics Forum | Tue May 03 21:14:19 EDT 2011 | davef
Can we talk some to better understand the scope and breadth of the problem? * From your picture, it looks as if the problem shows-up on some pads, but not others. Is this accurate? * Is this lot related? * Is this related to a few items from a lot? *
Electronics Forum | Thu May 05 08:14:45 EDT 2011 | kahrpr
Where black pad exists, it is not a common problem. When I read it is totally random I doubt that. You have defiantly something going on that is unique with the process. It is either your board manufacturer or your solder paste or your profile. It c