Electronics Forum: bga and spray and fluxing (Page 1 of 5)

Evalution on solder paste and spray flux

Electronics Forum | Wed Jan 26 20:52:06 EST 2005 | Chua

Hi, I'm going to evalute new solder paste and flux for wave-solder. Appreciate you could advise what are the things need to look out during the evalution. Any recommend step or proper way of doing solder paste and flux evalution. Appreciate your he

Evalution on solder paste and spray flux

Electronics Forum | Thu Jan 27 11:23:45 EST 2005 | russ

Well first off I wouldn't evaluate paste for a wave process. I would use solder bar instead. Flux - top side fillets and no shorting on the solder side, does it clean well after processing if using water soluble flux. How wide is the process win

I want to learn about bga technology from a pick and place mache

Electronics Forum | Wed Jul 14 16:59:52 EDT 2010 | swag

Solder paste on the pads will keep part aligned. If you do not use paste, you will need to apply tacky flux. You should not run without one or the other.

0201 and uBGA

Electronics Forum | Wed Sep 25 06:56:16 EDT 2002 | CH

U may check your profile ramp rate. The flux may evporated and look like cold joint

Flux Designations and Composition

Electronics Forum | Tue Jun 29 14:42:55 EDT 2004 | davef

You're correct, for every dumpster full of paper written about solder, there's a sentance written about fluxes. There's dribs and drabs about fluxes in most of the soldering books [ie, Manko, Klein-Wassink, Judd, Strauss, etc] and most of that is ve

Flexi boards and uBGA

Electronics Forum | Mon Jun 26 12:23:11 EDT 2006 | Rob

Yep, Book a holiday and let someone else sort it out. Otherwise e-mail me and I'll talk you through pallets, rigidisers, printer tooling, spray mount, Kapton tape, local fiducials (panels can strech & shrink) etc. Oh, yeah - for the connectors you

0201 and uBGA

Electronics Forum | Mon Sep 23 18:11:10 EDT 2002 | steveb

On an assembly reflowed in air saw the same thing: 0201's with a grainular solder joint, but 0402's and above with perfectly formed joints. Reflow profile all within acceptable tolerances. Reflowing in nitrogen solves this problem, but increases t

BGA rework and inspection

Electronics Forum | Thu May 30 10:31:03 EDT 2002 | robbied

Hi Yannick. This is an issue that we are just recently getting into but here is some ifo that I have gathered so far. I have seen/ used 2 different rework machines. The one we have bought is a 'PACE TF2000' which was at the lower cost end of the mar

Re: Fountain Wave Soldering and Repair/Rework Equipment

Electronics Forum | Fri Jan 22 15:48:14 EST 1999 | Chrys

| Hello, | | I will be evaluating and qualifying two equipment types. The first is a fountain soldering device. I need practical advice on all the stuff you guys and gals know about as good, bad, ugly, best applications, setup, limitations, and all

Solder beads and wave soldering

Electronics Forum | Thu Jul 06 03:03:56 EDT 2006 | ronalds

Thank you all for your input. The MF300S Multicore flux is rated for lead free. There is not much dross or contamination. We are using nitrogen. I've tested the boards with the curing test of IPC-TM-650. I think you're all right about the preheat.

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