Electronics Forum: past (Page 349 of 989)

White spots on PCB

Electronics Forum | Sun May 13 21:02:34 EDT 2001 | djarvis

Gary, You're not trying to clean these boards with Iso or other solvents after using no-clean solder paste? That'll do it.

Solder Paste Height

Electronics Forum | Thu May 17 13:37:10 EDT 2001 | davef

I wonder if some of the points here http://www.smtnet.com/Forums/index.cfm?fuseaction=view_thread&CFApp=1&&Message_ID=5926&_#Message5926 might help.

What does OA stand for?

Electronics Forum | Tue May 29 22:07:42 EDT 2001 | Robert Sykoh

OA stands for Organic Activated. In the good old fo SMT processes, a lot of different fluxes are being considered. RA, RMA, OA, etc. If you look at the present no-clean paste, it is actually RMA.

Viscometer - paste or glue measurements

Electronics Forum | Fri May 25 20:25:18 EDT 2001 | morefun

Thanks Dave, you were pretty quick on that response, and it was well taken. Cal or Wolfgang any thoughts or should I go find a rock to climb under?

Stencil cleanliness and inspection

Electronics Forum | Tue Jun 05 16:40:46 EDT 2001 | kerryn

Thanks Phil. However, my objective is to identify stencils that are not 100% clean prior to sending to inventory. I want to catch it before the solder paste has a chance to dry and harden in the apertures. Kerry

No Clean

Electronics Forum | Tue Jun 12 13:53:43 EDT 2001 | Eliud Rivera

We are trying to quilify a No-Cclean solder paste and we would like to know what kind of criterias or measurments are use to qualify the amount residues? Can we use an omega meter for that? What equipment measures SIR?

effective liquor for cleaning the residues in reflow oven

Electronics Forum | Wed Jun 13 17:17:57 EDT 2001 | medernach

I use BioAct SC-10 and it seems to work pretty well. The best bet is to contact your solder paste manufacturer and ask them for a recommended cleaning solvent for the flux residues... Regards, Justin

Rheopump vs. squeegee

Electronics Forum | Thu Jun 14 11:03:20 EDT 2001 | vance66

We will be using the same paste for all boards. We would need to change head because of board widths. Is the amount of time changing heads comparable to the time changing squeegee blades?

Rheopump vs. squeegee

Electronics Forum | Mon Jun 18 08:29:25 EDT 2001 | Carl Evans

If you visit the Cookson web site you will find a detailed list of trials of pastes and how they performed within the pump.

Pin & Paste on Thick PCBs

Electronics Forum | Mon Jun 18 08:15:29 EDT 2001 | zanolli@tekais.com

Dear Jack, If you are trying to attach a connector - contact me offline or go to http://www.tekais.com. Teka offers a technology that deposits enoough solder volume on connectors for thicker PCB's.


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