Electronics Forum | Thu Nov 09 10:22:46 EST 2000 | John
Luckily for me, if the part were soldered and on the board prior to any processing, I will still be able to build it. I am currently experimenting with screen printing a high temp paste, hand inserting the part (even Chad hasn't come up with an econ
Electronics Forum | Wed Jun 28 12:37:05 EDT 2000 | Brian W.
HASL plating, by its very nature, is inconsistent in terms of thickness and consistency. The plating varies from spot to spot on the pad, as well as pad to pad. This will wreak havoc on your screen printing process and your placement. From talking
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 | Fri Jun 02 09:31:26 EDT 2000 | C.K.
Okay, there's a debate here at my company. We build a card here that, often times, we get batches where there is excess HASL in the VIA hole barrels. Here is the problem that this causes: During the "1st reflow", the excess HASL bleeds out of the
Electronics Forum | Fri Apr 14 13:30:20 EDT 2000 | Murad Kurwa
Hi All: Can you tell me specifically if you converted an exiting product made with Clean process using WS609 or compatible to 'No-Clean' process. We have to convert assemblies from current clean process at a CEM to No-Clean process in our own factor
Electronics Forum | Tue Feb 20 14:00:50 EST 2001 | billschreiber
Hi Dave, It sounds like you haven�t been shopping for stencil cleaners in awhile. Ultrasonic stencil cleaners start at $12,900, evaporators start at $6,800 and 440-R SMT Detergent is $19.00 per gallon. For $19,719.00 you get everything you need to
Electronics Forum | Tue Feb 20 21:19:43 EST 2001 | davef
You�re correct, many of us recognize that problems in paste deposition are the source of the majority of SMT component defects. What would you say that the portion of the "51 to 72% of all solder defects are the result of screen-printing problems" t
Electronics Forum | Fri Oct 19 00:37:43 EDT 2001 | ianchan
Hi, my guys did such solder paste deposits on PCB bareboards before, (before my physical join with my current company), approximately 2-3 years ago, for a small Lot run. What the PCB supplier did was to apply "block" shaped Sn/Pb paste alloy onto t
Electronics Forum | Tue Oct 12 04:18:12 EDT 1999 | Scott Davies
| | We have three buckets filled with leftover solder paste from our screen printing process. Kester has informed me that they no longer take paste, but only dross and pot dumpings. Does anyone know if there's someplace I can recycle this, or am I
Electronics Forum | Tue Oct 12 04:26:30 EDT 1999 | Brian
| We have three buckets filled with leftover solder paste from our screen printing process. Kester has informed me that they no longer take paste, but only dross and pot dumpings. Does anyone know if there's someplace I can recycle this, or am I go
