Electronics Forum | Fri Feb 11 16:15:05 EST 2000 | Chris McDonald
You can get a better Kapton tape (you must be using the cheap stuff) that leaves no residue. If that fails then you can get edge maskers that slide overtop of the finger and they are reusable. Or you could get a solder pallet made for the assemblies
Electronics Forum | Fri Apr 07 11:52:44 EDT 2000 | Ashok Dhawan
Can anyone suggest a cleaning solvent for removing silicon residue after K Tape has gone through 2 cycles of reflow soldering ? The solvent or cleaning method has to be compliant to IPC Standards - to be used for cleaning gold edge fingers - PCB asse
Electronics Forum | Tue Jul 13 18:18:39 EDT 1999 | King Kong
Hi All, Does any one experienced the solder on gold finger after reflow. Its about 5 to 8 mils diameter . We'd clean the entire screen printer, mounter & reflow as well, but doesn't help much.
Electronics Forum | Sat Feb 14 12:33:30 EST 2004 | agp
We are currently experiencing solder bursting in one of our smt reflow lines. Burst as small as 5mil diameter are messing gold fingers of the pcbs. Anybody who have experienced same problem? Would appreciate any suggestion.
Electronics Forum | Sun Sep 26 11:54:06 EDT 1999 | Earl Moon
| i had a problem here, during the wave soldering process, we apply a water soluble mask on the gold finger to protect it from contamination. But after washing, there is still some mask left on the gold finger. | Can anyone pls advise is there any pa
Electronics Forum | Wed Mar 21 01:19:29 EST 2001 | PeteC
We're watching more carefully at post-print and pre-reflow inspections for products with the gold finger contacts. Not 100% sure the cause. SMT line people suspect primary cause is improperly wiped stencil. Do you know any other possible causes? We g
Electronics Forum | Mon Aug 08 10:27:15 EDT 2005 | russ
I am a contract Mfgr. and we receive these designs quite frequently. ENIG is the finish and the designs do utilize pushbutton switches from membranes. I am not provvy to any reliability or performance data but we process alot of these designs. If
Electronics Forum | Fri Jun 09 11:52:59 EDT 2006 | Rob
Yes you can solder on to it - just tried it with some 0603's across some gold fingers with tin lead paste & a heat gun. Don't know how many times you could rework it though. Any chance you could get hold of an aold populated board from your custome
Electronics Forum | Fri Jun 09 11:18:25 EDT 2006 | kehoem@bellsouth.net
Question; Do you think it's possible that your customer has got his units mixed up & actually means 0.3 micro inches of gold over 0.5 micro inches of Nickel? That is what I said but their vendor says they are building to print which says 80 uM and i
Electronics Forum | Wed Mar 21 16:32:03 EST 2001 | mparker
The root cause is dependant on the type of solder "splash", ball, whatever, that you are seeing post reflow. If it is smears, then cleaning the stencil underside is probably the answer. Are you using automatic wipers? How many print cycles between w
