Electronics Forum: kester (Page 16 of 51)

BGA Voiding for RoHS

Electronics Forum | Fri Nov 13 08:27:43 EST 2009 | herman

Your customer is very unreasonable to demand void-free BGA SJs. Minor voiding is not a condition for rejection per IPC-A-610D, J-STD-001D, or even J-STD-001DS (Space addendum). Having said that, let me tell you that the voiding has little or nothing

Solder Paste Type for QFN Printing

Electronics Forum | Tue Sep 14 13:43:25 EDT 2010 | rayguide

Use No-Clean fine-particle solder paste from Kester. http://www.suite101.com/content/solder-paste-and-its-application-in-smt-a249514

Batch cleaner

Electronics Forum | Tue Sep 07 12:57:00 EDT 2010 | jrr3434

Thanks for the info mike. How well do these batch cleaners work with densely populated through hole boards that were solder with no clean flux? Is there a problem with water getting trapped under large capacitors? I'm using kester 959t for flux on b

BGA REFLOW

Electronics Forum | Tue Jan 11 19:47:58 EST 2011 | sai

Use the Kester solder paste EM828 SAC305. Guarantee good reflow. Peak@250 Reflow@80s Soak@75s.

Need Solder Ball 95.5% Sn 4.0% Ag 0.5% Cu

Electronics Forum | Mon May 09 10:03:26 EDT 2011 | markhoch

I would contact one of your solderpaste manufactuers. (i.e Indium, Alpha Metals, Kester, etc)

Need Solder Ball 95.5% Sn 4.0% Ag 0.5% Cu

Electronics Forum | Thu May 19 19:28:31 EDT 2011 | Rstadem

Try Easyspheres (Kester), or Q-Pearls (Qualitek), or Alpha. They all have solder spheres in that alloy.

Need to clean no-clean flux?

Electronics Forum | Thu Aug 04 09:32:03 EDT 2011 | rway

No need to clean unless the sticky residue is an issue for you. If you are working with RF, it could be an issue. You may have probe contact problems as well with ICT and FT fixtures. We use a low residue flux for our wave solder machines (Kester

Choosing Solder paste

Electronics Forum | Tue Dec 04 05:27:43 EST 2012 | eniac

Last 6 years I work with EM907 from Kester, with SAC305. And I don't have any problems.

Kester 985M - Will It Help?

Electronics Forum | Tue Nov 26 11:20:30 EST 2013 | patrickbruneel

Any alcohol based flux will outperform a water based (VOC free) flux. If one thing I learned in my 35+ years in the electronics industry "Water and electronics is a bad combination". Patrick

Kester 985M - Will It Help?

Electronics Forum | Tue Nov 26 11:40:50 EST 2013 | patrickbruneel

Joe, And lead FREE in combination with voc FREE is a cocktail for disaster. And it surely ain't FREE (if you know what I mean):-).


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