Electronics Forum | Tue Feb 27 18:16:42 EST 2001 | davef
I have never seen excess tin [heard of it, just never seen it]. Excess lead yes, but tin no. See, tin oxidizes faster than lead. This means that dross has a higher tin content than the solder in the pot. So, with a very high dross machine, we regul
Electronics Forum | Tue Dec 28 15:12:03 EST 1999 | Bill Schreiber
Rick, Ultrasonics is a mechanical scrubbing action (cavitation) similar to any other scrubbing action, if you scrub long enough, you stand the chance of wearing away some of the surface material (shiny coating of a solder joint). The shiny coat on a
Electronics Forum | Wed Nov 10 11:31:06 EST 1999 | John Thorup
Hello Horace You're lucky in that you have two of the same machine. You should be able to arrive at the root of the problem by comparison. The problem is likely to occur in one or more of these areas: MACHINE: As said , pump speed and air contact ar
Electronics Forum | Tue Oct 12 16:26:01 EDT 1999 | Jeff Sanchez
| | | | 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 a
Electronics Forum | Mon Oct 04 07:47:34 EDT 1999 | park kyung sam
| | What are pro's and con's of reflowing top side first and curing bottom side chip components, and then wave soldering bottom side? | | | | How about curing bottom side first and reflowing top side later? | | | | What percentage of companies run
Electronics Forum | Tue Sep 07 20:46:55 EDT 1999 | Jeff Ferry
| | | My company is starting a prototype. The chips that will be used appear to be very sensitive. The vendor part number is Neta-40-2. | | | My question is what solder temp should be used for this part? | | | Any advice is appreciated. | | | THX. |
Electronics Forum | Wed Aug 18 05:09:56 EDT 1999 | Brian
| | We have a design on which there is an ASIC that will not be produced anymore in the future. As we want to make this design over the next 10 years we are evaluating the possibility to buy the necessary ASICs for the next 10 years. This will give u
Electronics Forum | Mon Jul 26 12:55:08 EDT 1999 | Rob Fischer
I'm interested in hearing how many forum fans are interested in blatant advertising in the forum pages. At least Mike listed everyone instead of tooting his own horn. Some vendors support sites like these by buying banners and such. How effective
Electronics Forum | Tue Jul 20 10:08:30 EDT 1999 | Wolfgang Busko
| | I recently switched from solder paste in 500 gram jars to 500 gram tubes. I did this to try to limit the time the paste is exposed to the room environment. But we have a need to clean the stencil every 4 - 5 boards which means taking the bulk pas
Electronics Forum | Fri Jun 18 14:06:15 EDT 1999 | John Thorup
| | Now don't everyone jump on this at once, but it seems time for me to send out copies of my not even close to being dated copy of an article about HASL. Though it was published in 1992, in Printed Circuit Fabrication Magazine, and it got rave revi