Electronics Forum | Tue Oct 15 08:27:31 EDT 2002 | davef
I can't comment on 20 pitch TSOP, but wave soldering wider pitch parts require: * Orienting components with the leads perpendicular to the wave [moving parallel to the rails]. * Thieving [robbing] pads on trailing pads for the component. Search the
Electronics Forum | Tue Nov 24 11:44:12 EST 2009 | mikesewell
I think you're okay reworking with SAC305 but rework with SnPb will result in a SnPbBi alloy with a lowered melting point that may pose reliability concerns. As far as suitability of 58Bi42Sn goes - depends on your requirements.
Electronics Forum | Thu Dec 22 15:36:03 EST 2005 | CC
In general two step temperature reflow process requires minimum 40 deg C delta to be sucessful. We are not using vapor phase soldering but we have similar situation when we change to SAC lead free solder for PCB component population and secondary swe
Electronics Forum | Wed Apr 13 10:05:58 EDT 2016 | donnie15
I am working on soldering an Large LGA module to a PCB and am having some issues with opens due to variation in the board flatness. I have tried adding more paste but get shorts and excess flux as I get above a 7 mil stencil. I have tried adding sol
Electronics Forum | Thu Apr 05 10:50:08 EDT 2001 | CAL
Per our staff here at ACI......... Higher Temperatures maybe necessary to achieve good solder process results. The alloy formed when HASL coating protects the copper is the same as that when OSP provide protection. Temperatures may be increased to im
Electronics Forum | Mon Apr 12 10:39:48 EDT 2004 | Ron Herbert
Correct preheating of the assembly is critical. Check with your flux manufacturer regarding the recommended topside pcb temperature as it enters the first wave. It is important that this temperature be achieved without burning the flux on the bottom
Electronics Forum | Tue Jan 13 04:35:26 EST 2004 | pablowe
We have done some trials with Lead free which appear to have gone well. We will be introducing a number of new products over the coming months and it is an opportune time to begin using lead free on these products which will be required by law in the
Electronics Forum | Mon Feb 17 16:06:24 EST 2003 | smsinc
You may want to consider a Nitrogen Generator as an alternative to portable Dewers. Reduced handling,no gas contracts and usage on demand will cut your liquid nitrogen costs in half.A good rule of thumb for consumption guesstimating is if you use two
Electronics Forum | Fri Jan 18 07:46:34 EST 2008 | adlsmt
The reason we are using laser rather reflow is because the Osram Golden Dragon part my customer needs to use is not rated for reflow. I would prefer to stay away from hot bar as there is maintanance required on the tips, Unitek had a pretty sweet mac
Electronics Forum | Tue Oct 20 19:26:10 EDT 2009 | fdbittner
I think machine selection depends upon your application (pitch, volume, changeover from pb to pb free etc...) I have experience with ERSA and Pillarhouse Jades. Both very good in their own right. Pillarhouse are relatively cheap, and quick to chan
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