Electronics Forum: high temp.solder (Page 1 of 12)

solder balls on high temp.solder

Electronics Forum | Mon Dec 11 15:12:20 EST 2000 | accuspec

we are using alphametals no clean 95sn/5ag CL775 paste. After reflow there are solder balls on the board. mainly are around the cap. We are using a conceptronic concept 60 air. There are 4 zones with 8 chambers. We are not sure what the profile

Re: solder balls on high temp.solder

Electronics Forum | Mon Dec 11 15:50:01 EST 2000 | externet

Hi ! Try fresh DRY solder paste... Keep solder paste in a sealed container until the moment of use. Humidity absorbed by the soldering paste becomes vapor violently at the moment of heating it , expelling the solder in form of balls everywhere.

Re: solder balls on high temp.solder

Electronics Forum | Mon Dec 11 17:09:27 EST 2000 | Michael Parker

Get a profiler for your oven. To say "we are not sure" and "we think it might..." shows you are running with a WAG (Wild Ass Guess). Not a good place to be if you intend to produce anything reliable, with quality. Run your profile and verify that yo

Re: solder balls on high temp.solder

Electronics Forum | Tue Dec 12 03:15:13 EST 2000 | Chris May

The profile that you should be using, hopefully, is detailed in the paste data sheet. Connect your thermocouples to various parts of the board, depending on layout, population etc; and then run some trials observing the profile on your oven monitor/

Re: solder balls on high temp.solder

Electronics Forum | Tue Dec 12 17:54:04 EST 2000 | ralph

I've had this problem myself, though in using water soluables. But the process to eliminate it is still the same. There are three possible causes for this to occure. Too much humidity, to much solder, and too much heat. Are you leaving the paste

Re: solder balls on high temp.solder

Electronics Forum | Wed Dec 13 19:40:38 EST 2000 | Jerry Wetzel, SME, EM/SME

Your profile must be precise, your stencil aperture sizes and shapes are very important, and the size of the pads on the boards should be very close to what the part manufacturer recommends. We had some trouble with hi-temp paste, and discovered tha

high temp wave soldering

Electronics Forum | Wed Nov 20 10:50:49 EST 2002 | dphilbrick

Kester has a special alloy for high temp soldering. Alloy 123. I would think that if you coocked 63/37 to 360c you would have a pot of dross in no time! Doug

high temp wave soldering

Electronics Forum | Wed Nov 20 07:50:00 EST 2002 | aerineng

Hi, I'm an SMT refugee working in component manufacture - hey, times are hard! I've been asked by a customer to test some of my parts at high temperature on the wave - up to 360 deg Celsius. I've checked my wave and it's only capable of getting up

Re: high temperature solder alloy

Electronics Forum | Fri Oct 08 10:08:48 EDT 1999 | Glenn Robertson

| | | | I have a board, 4 spacers needed to be soldered on the board | | | | first with the normal 62Sn37Pb alloy. Then, capacitors are manually soldered on the boards. The density of the board is quite high. If we wave soldered capacitors first,

High Temp Solder Application

Electronics Forum | Tue Nov 07 14:31:01 EST 2000 | John

My company manufactures a board for a heavy duty automotive application. One of the through hole parts on the board dissipates enough heat that it requires high temp solder. Does anyone know of or have experience with a high quality selective solde

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