Electronics Forum | Mon Jun 25 20:39:08 EDT 2001 | ianchan
Hi mate, no complete info given from what i see, so just some humble comments, mayhaps you review : 1) PCB pad finishing - Copper+nickle plated? coz if so, nickle is a KILLER to good solder wetting. what we did back here, was to HAL coat the nickle
Electronics Forum | Tue Dec 14 17:02:04 EST 1999 | John Thorup
Hello Kris If you do have and OSP coating I'd say Curtis has nailed it. But you seem to have references to gold. Does this board have a standard nickle/gold finish. If so what sort of "solder on gold" problems were you having? Reading between the
Electronics Forum | Tue Dec 14 15:21:41 EST 1999 | BJL
This may be the nickle paladium lead material or an 87/13 tin lead plating on the leads. Paladium and 87/13 has a slower disolution rate and takes longer for solid joint to be created between two metal surfaces. Reflow temp must allow the joint to be
Electronics Forum | Sat Jul 05 07:30:04 EDT 2003 | AlCapone
If the problem as you described as the gold plating contaminated, and the Nickel layer exposed to the solder pot. However, the purpose of the gold layer is to protect the nickel and copper layer not turn into corrosion and resist to other issue (humi
Electronics Forum | Mon Nov 19 17:40:38 EST 2007 | bbarton
No, the thicker plating and need for very high quality drilling and plating is DUE to the higher copper dissolution rate and higher contact time. As to the Sn100C material, their claims seem to confirm a "lower" copper dissolution rate, but so does A
Electronics Forum | Fri Jun 03 15:19:32 EDT 2022 | dwl
I don't recall thicknesses off the top of my head but brittleness becomes an issue more for gold plating then ENIG. .125 um should be fine. also, gold ain't cheap so its unlikely your PCB fab will get anywhere near the max tolerance. On the other e
Electronics Forum | Fri Feb 28 08:57:34 EST 2003 | davef
We used to bake [100*C for 6 hours] all of our boards, but no longer bake at all. Before going off, your bake recipe is probaly OK. If anything, it's probably too short. Consider measuring the weight of wet boards, baking for a time, measure, bake
Electronics Forum | Tue Nov 23 20:21:44 EST 1999 | Curtis T.
Does any one have any experience with the transition automation permalex squeegee blade (I called them and they couldn't tell me much), or any blade other than the typical nickle coated spring steel. Part of our production has been moved (by our cus
Electronics Forum | Tue Mar 17 10:47:56 EDT 2020 | davef
IPC-1601 covers PWB bake-out, methods for determining optimum bake time and temperature, caveats for certain PWB plating finishes, etc. IPC-1601 is to bare boards as J-STD-033 is to components
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
