Electronics Forum | Tue Dec 05 04:30:02 EST 2017 | jan_pedersen
You find good information in IPC-4554 that includes recommended total Sn thickness and recommended free Sn. It refers to how much usable Sn is needed to meet coating durability categories defined in J-STD-003. As example, if you need 6 months shelf l
Electronics Forum | Tue Feb 29 13:18:16 EST 2000 | Steve Schrader
We have what appears to be a recurring problem. On immersion gold boards only, we are having solderability problems. After reflow, selected parts can be popped right off the board. There is then a dark haze left on the pad. The paste on the compon
Electronics Forum | Wed Mar 01 17:03:56 EST 2000 | Dave F
Steve: Someone is trying to trick you. He/she is trying to be very smart, but he/she didn�t anticipate this "dark haze" coating problem. I suspect that this person is someone you speak with every day in your plant. They may be the one that came-u
Electronics Forum | Thu Mar 02 21:24:27 EST 2000 | Dave F
Glen: As I mention in an earlier response in this thread, I think someone at Steve's plant (or may be in his packaging spec for the fabs) is doing something to leave a residue, but I'm also thinking solder mask ... ENIG can be applied before or aft
Electronics Forum | Fri Mar 02 08:52:20 EST 2001 | markkrmp
Are your voids looking like blow holes also? Is this only occurring on the solder joints of the Thru Hole components and Via's? Or does this happen on SMD pads? My experience is that we have seen this but only with some of our older PCB's which are
Electronics Forum | Tue Jul 27 15:56:20 EDT 1999 | Dave F
| | Just go look at the thread on stencil cleaners started by Scott Davies in the March 1-15, 1999 achives if you want to see some juicy stuff...then make your mind up about vendor inputs. Pretty obvious if you ask me... | | | | -Steve Gregory- | |
Electronics Forum | Tue Apr 27 12:04:44 EDT 1999 | Bob
I hope I'm not too late with some help for you. I have purchased stainless steel wire cleaning baskets for a vapor degreaser from: Cooley Wire Products 5025 North River Road Schiller Park, IL 60176 847-678-8585 fax 847-678-8612 They do a very nice
Electronics Forum | Wed Apr 23 13:33:31 EDT 2003 | davef
We divide our operations, repair, and office facilities into work area classifications, each with its own set of requirements and necessary control to meet the requirements of our procedure. The requirements are in the areas of: * Air Quality * Ligh
Electronics Forum | Mon Jan 26 20:11:02 EST 2004 | davef
The primary driver to the set points for your oven is not the board or the number of zones in your oven. It's your paste. If you need a "ball park" guesstimate as a starting point, your equipment supplier is probably the best place to start. So fo
Electronics Forum | Wed Apr 21 00:14:10 EDT 2004 | ramanandkini
We wish to use rectangular 4 segment solar panels in our quartz watches & charge the battery. The size of the soalr panel is 18.20mm X 7 mm and the thickness is 1.15mm. The other popular application of this type solar panels is in calculators. These
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