Electronics Forum: dewars (Page 1 of 1)

Selective solder N2 consumption

Electronics Forum | Wed Aug 26 15:44:23 EDT 2020 | dwl

I agree with the other posters. A bottle will last a day tops, A dewar should last a week or two. Dewars have a limited shelf life as the liquid nitrogen will vent even if your aren't using it. My experience is with ACE machines. Bottles are really

Selective solder N2 consumption

Electronics Forum | Tue Aug 25 12:08:12 EDT 2020 | dontfeedphils

On a small, single stage RPS machine I was going through a dewar (not sure on the capacity differences between what you're using and a dewar) every 6-9 business days running normal 8 hours shifts. Side note, I'd suggest trying out SN100C alloy over

Nitrogen purity requirments

Electronics Forum | Thu Jun 29 17:38:51 EDT 2006 | flipit

I might be wrong since I don't know this piece of equipment but I think ROL might be a better measure. For 63/37 it used to be 20 ppm ROL (residual oxygen level) was about what you needed for a reflow oven. This is to take full advantage of all tha

Selective solder N2 consumption

Electronics Forum | Tue Aug 25 21:12:14 EDT 2020 | stephendo

We didn't use the machine regularly. The dewars would only be good for a month or two whether you used it or not. The nitrogen evaporates and discharges. The first day we forgot to warn afternoon shift. As far as I know nobody had to change their pan

Indium Solder Hermetic Seal Voiding

Electronics Forum | Thu Jan 11 22:15:27 EST 2007 | behrsam

it's a vacuum dewar so adhesives will eventually permeate and the vacuum would be lost. Sounds to me since I have the N2 capability, I definately should try it. I am obtaining Indium Flux and Solvent so I can adjust the activity when I start using

Need Consulting Assistance for Hermetic Seal Soldering

Electronics Forum | Tue Jan 23 14:09:11 EST 2007 | behrsam

We have been struggling to create an improved higher yield process for hermetically soldering a metalized Ge window to Kovar. Process utilizes flux with a Indium alloy solder preform. End use is for a dewar package. We are looking for a consultant

Selective Solder Equipment

Electronics Forum | Thu Mar 11 11:08:22 EST 2010 | geocep

I am using AIM Electropure SN63/Pb37 Solder, & AIM NC266-3 Flux; just like what ACE recommends. I have both Ultra High Pure T-Tanks and a Cryogenic Dewar Tank for Nitrogen, and neither seems to have improved the problem. I place a piece of tempered


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