Electronics Forum | Tue Sep 27 20:10:17 EDT 2005 | davef
Use "Bakers Secret" Teflon coated loaf pans to make the nicest solder ingots that you have ever seen. We hope you are using the term "draining the solder pot" euphemistically. Using the drain on the bottom of the pot is dangerous. [Too much can go
Electronics Forum | Wed Sep 28 10:27:08 EDT 2005 | SuMoTe
Thanks to Stevezeva for hosting the pictures: Bakers Secret pans are the way to go, I use the "bread loaf" size. http://www.stevezeva.homestead.com/files/DrainingSolderPot.jpg http://www.stevezeva.homestead.com/files/DrainingSolderPot2.jpg Pray t
Electronics Forum | Thu Sep 29 19:18:24 EDT 2005 | HLy
Hi, I noticed that the solder joints on my BGAs end up with a lot of wrinkles after reflow. See picture at: http://pstr-r02.ygpweb.aol.com/data/pictures/02/01A/17/DD/E3/9E/n8BhepQLFDs6GMSwaRNxPCTWR5NdpUJZ0300.jpg Does anybody have any ideas what cau
Electronics Forum | Wed Oct 12 11:08:12 EDT 2005 | Mike
Hly, The solder ball in your picture looks just like the countless BGA solder joints that I�ve produced over the past 8+ years. We've had a good number of these joints X-rayed, cross-sectioned, and thermally stressed. Some say that the stretched loo
Electronics Forum | Mon Oct 24 17:56:57 EDT 2005 | Ali
Hello all: A couple of queries on matte Sn plating: My Application: 2 Reflows in subassembly reflow+ 8 Hr Steam age+ Solderability (Dip and look) for sub assembly to mother board soldering. Queries on Matte Sn: 1- Different plating vendor
Electronics Forum | Wed Oct 26 23:29:57 EDT 2005 | milroyperera
Hi, As I have seen in the data sheets from solder paste suppliers they always recommend to keep the solder paste until it reaches the ambient temperature after taking out from normal storage temperature. Mostly the storage temperature is 5 - 10 Cels
Electronics Forum | Thu Oct 27 08:27:57 EDT 2005 | Adam
Hi We are trying to solder a a contact whose base material is stainless steel, this is then nickel striked with a gold plating of upto 3 microns. We are trying to hand solder this to a standard 1.6 FR4 PCB with a HASL finish. We are seeing problems
Electronics Forum | Tue Nov 08 20:58:49 EST 2005 | davef
We buy humidity as a potential cause of solder balls, but we're not biting on dewetting. Something else is causing that. Questions are: * What's the temperature and RH of your SMT production area? * What kind of paste are you using? [Some water was
Electronics Forum | Fri Nov 11 04:40:18 EST 2005 | pavel_murtishev
Good day, First of all used solder paste should be placed in special container. It should be kept separately from �fresh� solder paste from the same jar. Limit paste usage period after opening the jar according to manufacturer�s specification. When
Electronics Forum | Thu Nov 17 20:51:16 EST 2005 | cangly
Morning Mike, We use Pb63/Sn37, Alpha Metal alloy. Solder pot is at 250 C. The profile of board after Preheat about 100 C, Lambda Wave about 220C (use both Lambda and Chip wave), DWell time 2.1s ~ 3s. Conveyor speed 1.5 in/min. We run by bare board a
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