Electronics Forum | Mon Aug 24 21:43:28 EDT 2009 | davef
In reworking 0201, we: * Cut the 0201 in half with a side cutter * Heat the solder on each pad separately and flick the half 0201 off the board * Preheat a new component to +150°C with a hot plate * Solder a new 0201 on the undressed pads with a hot
Electronics Forum | Tue Sep 01 11:05:36 EDT 2009 | saisungold
We gold plated PCB and while soldering, the adhesion of soldering is not uniform at the tips(soldering ends). Please help us to solve the problem.
Electronics Forum | Sat Oct 10 12:08:11 EDT 2009 | davef
George Milad [National accounts manager of technology, UIC/Uyemura International, gmilad at uyemura.com] is Chairman, IPC Plating Committee. He may be able to steer you towards a solution.
Electronics Forum | Tue Nov 03 18:35:28 EST 2009 | gregoryyork
was this hasl finish looks like it has been corroded from the inside of the hole wall looking at the shape of the break in plating
Electronics Forum | Thu Dec 17 03:25:00 EST 2009 | tod1967
Not sure if Multicore/Henkel still offers it, Prozone is an outstanding chemistry for RMA removal. Heated to a relatively low temp. No Ultrasonics necessary. Could use a Pyrex Beaker Hot and Hot Plate to test.
Electronics Forum | Mon Dec 14 13:20:56 EST 2009 | stepheniii
Xrays go through aluminum quite well. I've xrayed BGAs with heat sinks that were well over an inch tall and they only made faint shadows. What material is the bottom of the PCB? And how are you going to bond to it?
Electronics Forum | Thu Dec 17 03:20:32 EST 2009 | tod1967
Sounds like a good challenge. What is your interconnect bond method? Solder Paste, Pre-Form/Liquid Flux or Paste, Assuming your using solder. Reflow method?
Electronics Forum | Thu Dec 17 03:10:34 EST 2009 | tod1967
Chemistries are limited for WS Mask. Try looking/changing other components, trying different flux types is easy, identify water cleanliness, is it ionic/no-ionic...probably is benign. Could be a plating reaction which is tough to investigate. Call
Electronics Forum | Wed Dec 23 12:46:51 EST 2009 | stepheniii
Can you etch where you want to solder to? But you would need harsh chemicals to do that. The whole point of chrome is to not chemically react.
Electronics Forum | Thu Dec 24 01:06:11 EST 2009 | isd_jwendell
You can weld (spot) to chrome. Maybe you could weld a nickel tab to the chrome part?
