Electronics Forum | Thu Oct 13 18:00:01 EDT 2011 | spitkis2
>We put paste on the board at SMT to solder them on initially. Then not when they get reworked? When assembling the board, solder paste is applied to the BGA and all other SMT pads since the stencil was fabricated with those openings. If the openin
Electronics Forum | Thu Apr 17 07:51:19 EDT 2014 | emeto
Opens are on the device to the PCB - mainly on the edges, that makes me think I get some kind of warping,but even if I bake parts and boards doesn't help. We also tried different reflow profiles - same results. I hear that some people use dip fluxers
Electronics Forum | Mon Apr 21 16:38:45 EDT 2014 | barryg
Hello all. We have been having some problems soldering to what we believe is a nickel plated spring steel battery terminal to a PCB. We have tried scrapping , then tinning, dipping and still have problems. Are there any special fluxes or pre-treats t
Electronics Forum | Sat May 09 09:10:19 EDT 2015 | sarason
Might I add, avoid Y5V if you want a reliable design and Marc is correct do look at those charts for X7R voltage dip under load, if you are doing low volume, save yourself the trouble and time, just overrate. sarason
Electronics Forum | Sat May 09 09:12:53 EDT 2015 | sarason
Might I add, avoid Y5V if you want a reliable design and Marc is correct do look at those charts for X7R voltage dip under load, if you are doing low volume, save yourself the trouble and time, just overrate. sarason
Electronics Forum | Fri Jun 05 00:08:32 EDT 2015 | acepa
Hi, I need a recommendation for a manufacturer on a reasonable cost conformal coating (silicone or other). This is a US domestic appliance PCB 9 volts only that must be dipped. Silicone or other could be unused. There is a standard RJ45 socket I wher
Electronics Forum | Sat Aug 13 23:53:02 EDT 2016 | sarason
A Screen printer is similar to a stencil printer,except the screen isn't made from a piece of brass, copper, plastic or stainless steel, with laser cut holes. The screen has a stainless steel , silk or polyester mesh, which is then dipped in a photos
Electronics Forum | Tue Jan 31 09:41:06 EST 2017 | emeto
If there is no specific quality reason, stay with paste. More processes you add, more points of failure. They don't need a lot of paste to get attached to the board. The ones I used were 8mil round apertures, so I did cut 1:1 on a 3 mil coated stenci
Electronics Forum | Wed Feb 01 02:21:26 EST 2017 | rob
80 micrometres (0.08mm) or 80 mil (2mm)? Smallest I've seen reliably printed is around 0.2mm x 0.4mm (01005 pad) and 0.2mm x 0.2mm CSP pad, not seen anything dispensed below 0.35ish, but we are not cutting edge.
Electronics Forum | Mon Feb 06 22:38:46 EST 2017 | david_chiu
No matter in selective soldering or wave soldering process, higher pot temperature and longer wetting time can increase IMC thickness and joint strength(reliability), but as Daivf said, you need to care if the DIP component and bare PCB was damaged b
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