Electronics Forum | Fri Jun 16 11:28:53 EDT 2000 | Boca
Solder 'follows' heat. 1. Preheating is a great idea, use a baking oven to get the whole assembly up to temperature, use the preheaters in your wave solder machine (without wave) to preheat the assemblies ... 2. Or use the biggest soldering iron
Electronics Forum | Sat Jun 17 08:57:23 EDT 2000 | Chrys Shea
A few more tricks to try: - Got a hot air rework machine? You can get more controlled heat on the area and lower the risk of damage to the fab. I never got topside fillets un unrelieve ground planes until I went to convection preheat on my waves.
Electronics Forum | Mon Jun 19 19:08:21 EDT 2000 | Brian W.
IPC-610 Rev B: Paragraph 4.1 (page 52), As an exception to fil requirements on Table 4-1 on thermal heat sink planes plated through holes, a 50% vertical fill of solder is permitted, but with solder extending 360 degrees around the lead with 100% wet
Electronics Forum | Mon Jun 19 21:32:15 EDT 2000 | Dave F
Frank: Good luck on finding a specification. The right combination of material properties will greatly improve the lifetime of your flip chip component. Your flip chip supplier might be best starting place to determine underfill properties that ma
Electronics Forum | Thu Jun 15 22:06:15 EDT 2000 | Dreamsniper
Hi Raeto, 1. You do not have reflow oven. This means that you are not running Surface Mount Technology in your shop floor...am I correct? Why do you plan to have SMD's under your PCB's ? Can't you replace them with their PTH counter part and have th
Electronics Forum | Sat Jun 17 09:09:15 EDT 2000 | Chrys Shea
Contact the adhesive manufacturer, or their website. Most adhesive suppliers offer two cure options - one with a belt oven profile and one with a box oven profile. The belt oven is usually a ramp and plateau of 120-150C for approx 2 minutes. The b
Electronics Forum | Thu Jun 15 14:20:21 EDT 2000 | Kevin Simpson
Hi Peter, The Disk you are refering to can be outsourced from several different vendors. The thing to be careful with is getting a consistant colored disk. You don't want to have etc... some dull/bright..etc. We have found one local vendor we use.
Electronics Forum | Thu Jun 15 12:57:12 EDT 2000 | Dave F
0.0006" LT Total pad height = Thickness of ( Copper pad + OSP ) = 0.0014" + 0.00000157" = ~0.0014" (You must be using an organic solderability preservative (OSP) or Electroless Nickel immersion gold (ENIG) because 0.003" tin/lead or white tin would
Electronics Forum | Tue Jun 13 22:00:10 EDT 2000 | Dave F
Suan: I'll take the "easy half" of your question I suspect you�re talking about Kleenox. It is a powder that you can sprinkle on your dross bed. Several points are: � Kleenox does not reduce dross. It reduces the amount of solder entrapped in dr
Electronics Forum | Tue Jun 13 14:14:40 EDT 2000 | Deon Nungaray
Dear Mr. Cunli, I think it would be useful to have the ability to access the archives easily. However, I do have a comment on your home page format. In the past the SMT Forum entries were viewed on the top middle upper section of your home page and