Electronics Forum: kester (Page 26 of 51)

Re: Corroding Solder Joints

Electronics Forum | Tue Dec 28 12:26:22 EST 1999 | Christopher Lampron

Rick, Does the ultrasonic cleaning system that you use reuse the same water for each cleaning cycle? I have had a similar problem in the past using a Brandson ultrasonic cleaner and water soluable flux. The problem was the buildup of flux in the clea

Re: Solder Wetting

Electronics Forum | Tue Dec 14 20:57:07 EST 1999 | Curtis T.

John, I have never seen black pad covering a majority of the board, that would be a scarry thought. I think he is talking about building modules (sims dims) and getting soldering spatering on the gold edge connectors. We went the rounds with that s

Re: Reflow soldering Texas Instruments components

Electronics Forum | Thu Dec 09 17:18:44 EST 1999 | Russ

Ron, I'll bet you have the Ni/Pd finsh on these components! We have had the same problem in our shop. Not knowing the Kester spec. we had to raise the max temp to 220 Deg. C and increase the time above liquidous to 60 seconds or greater. It seem

Re: water soluble solder mask

Electronics Forum | Thu Oct 14 23:19:25 EDT 1999 | Dennis O'Donnell

Water soluble masks are great in my book. After having used the latex type, I found that the water soluble will save a lot of time. I dont't use a closed loop system, but I do have a filter on my discharge line. I have not experienced any filter c

Re: Recycling Solder Paste?

Electronics Forum | Mon Oct 11 12:29:01 EDT 1999 | John Thorup

We have three buckets filled with leftover solder paste from our screen printing process. Kester has informed me that they no longer take paste, but only dross and pot dumpings. Does anyone know if there's someplace I can recycle this, or am I go

Re: BGAs

Electronics Forum | Wed Mar 17 22:28:54 EST 1999 | Tony A

After switching from No-clean flux to Water soluble (Kester)we encountered voids problem (X-ray and microsectioning). Reducing the apperture sizes made the voids smaller but did not eliminate them. So we had to go back to No-clean. Any idea why voi

Re: Wetting Balance Equipment

Electronics Forum | Wed Aug 12 07:18:29 EDT 1998 | Earl Moon

Looking for Suppliers of surface mount wetting balance equipment. I've used Kester's equipment. It conforms to, and performs in accordance with requirements Dave stated. It's expensive stuff ($32K last time I bought one). For this reason, you migh

Re: Temperature & Humidity Effects on Solder Paste

Electronics Forum | Fri Jul 17 12:49:33 EDT 1998 | Aaron Delfausse

We currently use an ESP RMA paste. The reason that I initially posted the question was because we are conducting tests to see if this is infact the best paste for our processes. In running tests, however, certain variables, such as humidity, are ou

Zn/Pb Diffusion

Electronics Forum | Fri Apr 19 15:48:28 EDT 2002 | davef

I don�t know much about zinc either. I can tell you that zinc forms no intermetallics with lead. So, I�m not so sure that �diffusion� is the correct term. Of the following: * Hwang "Modern Solder Technology For � * Wassink "Soldering In Electronic

Plated through via's in pads.

Electronics Forum | Wed Feb 05 10:31:38 EST 2003 | bpan

Hello Everyone, Is anyone out there building smt boards that have plated through vias directly located through the pads. We are seeing some of these designs and the soldering is very poor because the solder is flowing through the via. We think that w


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