Electronics Forum | Tue Sep 09 10:52:03 EDT 2008 | leemeyer
If the connectors can withstand reflow temperatures you might consider solder preforms. I have personally never tried them. I beleive that you can get them in any configuration desired. Indium and Alpha are some suppliers that I am aware of.
Electronics Forum | Fri Jun 10 17:55:16 EDT 2022 | jdengler
Generally we overprint on the exposed part of these pads. When there isn't enough clearance at the end of the pad we place solder preforms with the placement machine. Jerry
Electronics Forum | Mon Aug 18 11:20:08 EDT 2008 | pjc
Stencil apertures are cut to deposit solderpaste onto the annular ring, provided its wide enough. Then you can place a solder preform if needed to ensure there is enough solder to fill the barrel. Here is some information on solder preforms: http://
Electronics Forum | Fri Jun 10 19:22:59 EDT 2022 | jdengler
Yes. We only do the side not under the component and do 25 mils if there is enough room. A solder preform is simply a block of solder that is shaped like a SMT component and comes in tape and reel. Most solder manufactures offer these. You can ta
Electronics Forum | Mon Dec 04 11:46:41 EST 2006 | samir
SMTNetters, I have a product coming down the pipeline that we'd like to make pure double sided reflow, it'll be RoHS product, and the hope is... we'll be able to solder the thru-hole stuff by screen printing solder paste and reflow soldering. Anybo
Electronics Forum | Tue Jan 23 14:09:11 EST 2007 | behrsam
We have been struggling to create an improved higher yield process for hermetically soldering a metalized Ge window to Kovar. Process utilizes flux with a Indium alloy solder preform. End use is for a dewar package. We are looking for a consultant
Electronics Forum | Thu Apr 14 05:20:58 EDT 2005 | aj
All, I am considering trying out the above to try and eliminate some of my defects on the wave process aswell as reducing cycle time etc. Incase of unfamiliarity with what it is : basically there is a Solder Preform present on the Header/Connector a
Electronics Forum | Thu Aug 03 09:05:09 EDT 2006 | Rob
We used to do point to point through hole soldering with robots. OK for medium to large volumes, but we did have to develop customer holders for each product. Quality was good - every joint was programmable for tinning, preheat, temperature etc, a
Electronics Forum | Fri Oct 07 17:22:16 EDT 2011 | davef
Questions are: * Pressure? * Heating ramp? * Solder alloy? * Solder preform or paste reflow? [We have more, depending on your answer] * 0.5 mm is pretty tight. Talk about tooling holes and measures to prevent flexing of the assembly * In time, heat a
Electronics Forum | Tue Mar 17 09:06:25 EST 1998 | Justin Medernach
| | Hi all, | I would like to have some information regarding the paste in holes process.We are the Backplane manufacturing and dealing with lots of thick PCB and would like to change the processes from wave to paste in hole.Any feed back of info
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