Electronics Forum | Thu Dec 14 12:18:01 EST 2000 | genny
Hello all, Our company has always used HASL finish on our products. Recently however, we have a had a problem on a couple of boards that I have been told cannot be avoided with HASL, and we should switch to ENIG(electroless nickel immersion gold).
Electronics Forum | Wed Dec 13 14:15:54 EST 2000 | Chris
I have a product where an IC is soldered using a stencil which puts down way too much paste. The result is massive bridging. Anyway, one of my coworkers claimed he could eliminate the bridging by baking the circuit board in an oven for 5 min at 90
Electronics Forum | Thu Dec 14 10:14:04 EST 2000 | PeteB
Jacqueline, Asuming you mean immersion silver: Advantages - Very flat finish compared to HASL, more easily solderable than bare copper with OSP and more process tolerant than this in our experience, reasonable shelf life, cheaper than immersion gol
Electronics Forum | Sun Feb 23 14:32:42 EST 2003 | davef
Sources of sulphur in PCB fabrication are: * Some locales have high H2S concentrations in the air. * Metal etching steps that use sulfuric acid or a sulfonated buffering compound may result in sulfate residues. * Sulfates can come from contact with
Electronics Forum | Tue Dec 12 13:33:52 EST 2000 | justin medernach
Dross removal is dependent upon the "activity" in your solder pot and the usage of a inert or an "air" atmosphere. The more moving that agitate the solder, the more dross. Basics first and then the answers will make sense. What is dross? Oxidatio
Electronics Forum | Wed Dec 13 20:22:37 EST 2000 | Dave F
George We use a 0.030" dot. Here's a link for aperture sizes for adhesive printing from Alpha. http://www.alphametals.com/products/techarticles/soldrpstncl/guidelines.html Here's a link for aperture sizes for adhesive printing from Heraeus. http:/
Electronics Forum | Fri Dec 08 19:08:52 EST 2000 | Mike Konrad
I do not know which specific flux you are using, but here are some general guidelines. If your wave soldering machine uses a foam fluxer, then there are foaming agents in the flux. Under �normal� conditions, the volatiles (including the foaming age
Electronics Forum | Tue Dec 05 21:11:35 EST 2000 | Dave F
The CDROM player in my personal computer just died and I replaced it with a more lively unit. Being an inveterate gearhead, of course I had to field strip the old CDROM player as soon as I pulled from my PC [and got the new one running]. There are
Electronics Forum | Tue Dec 05 19:15:41 EST 2000 | Michael Parker
Kel- My first impulse is to tell you to go ahead and try it your way. We all need to learn from our mistakes to find the right way. What you are proposing is called a "smoke" test. As long as you can keep the smoke inside the device, in your case th
Electronics Forum | Fri Dec 01 14:12:50 EST 2000 | Jim M.
My company currently uses water soluble paste for our SMT process. We were having trouble retaining hot water in our in line, closed loop DI cleaner. The cleaner kept shutting down when the water temp. dropped below 125C. As a result, the conveyor
