Electronics Forum | Thu Jul 06 02:08:27 EDT 2000 | Ralph Landry
I need to build a couple of prototype SMT boards and need some recomendations on some adhesive or epoxy to use to hold the parts down prior to hot air soldering. I find that some parts want to skip across the board when heated, or they want to walk
Electronics Forum | Thu Jul 06 20:17:25 EDT 2000 | Dave F
KC: I can't find it either ... I know I'm just rushin too much to concentrate on it. But yano even if it isn't in A-600, it doesn't make sense that you fab should be able to add copper without your approval.
Electronics Forum | Thu Jul 06 13:31:35 EDT 2000 | Michael Parker
Thanks Dave for the right methods that will get Patrick out of his mess. As long as one is a "Do it yurselfer". I still advocate having the supplier accept responsibility and clean the boards. After a bit of elbow grease, some cussin' and lost time I
Electronics Forum | Wed Jul 05 17:12:28 EDT 2000 | Michael Parker
Ashok- Rather than ink, consider using a paint marker. This is much more permanent (not easily removed with alcohol), is easily applied, comes in a "pen" like magic markers. Many pen tips available and a large choice of colors too. The down side is
Electronics Forum | Fri Jul 07 11:06:44 EDT 2000 | John O'Brien
You ought to consider Data Matrix directly marked on the boards It can be done with laser, inkjet, or other permanent marking methods. Never falls off, can be read even if 30% is obliterated. For an example, check any AMD (K6, K7) or Intel Pentium c
Electronics Forum | Thu Jun 29 11:52:23 EDT 2000 | JAX
sree, There is no Definite. You have to make the call. If you think the previous info was on target, use the info provided to find out the appropriate percentage relation between ball diameter, pad diameter, and aperture size. If you already run BGA,
Electronics Forum | Thu Jul 06 08:22:04 EDT 2000 | David Chapman
Have you thought about stencils for glue? We stencil all glue boards quite succesfully. No CAD no clogged nozzles, much faster speed aperture designs are fun to work with. Just a thought for an alternative. All the companies mentioned also will advis
Electronics Forum | Thu Jun 29 07:48:59 EDT 2000 | Mark
Welcome Bob, HASL stands for "Hot Air Solder Level" and is the final finish the raw boards guys place on the solder pads on the PCB. There are two popular raw board finishes, HASL which is a solder finish and NiAu which is Nickle Gold, and is a Gol
Electronics Forum | Wed Jun 28 22:21:39 EDT 2000 | Peter Lopez
I trying to find out information on how a normal process will look like with COB's. Questions I'm trying to answer are... Are SMDs and COBs normally on the same side? If yes, SMDs will be place first then the COB's. Is this assumption true? How
Electronics Forum | Thu Jun 29 09:36:04 EDT 2000 | JAX
Peter, There is no truth's about the way things are, How something is done is only bound by who is doing it. You can check the archives for info to get you going but it's all up to you. As far as placement order, it all depends on what you are placin
