Electronics Forum | Sat Aug 18 12:28:46 EDT 2007 | shing
I have checked all the method before, the problem still exists. Is there are more easy way for operator to visually check solder paste on golden finger? for example: using a special light as a tools for operator to identify the problems easily.
Electronics Forum | Sat Aug 11 13:37:02 EDT 2007 | shing
I am a fresh SMT engineer. I am now facing a problems, solder contamination on Golden Finger nearly about 1 year. I don't know what going on. I have checked the cleaningness of stencil, solder paste handling,IR re-flow profile and even PCB surface
Electronics Forum | Thu Aug 16 13:06:59 EDT 2007 | shing
Will solder contamination related to PCB's surface finishing?
Electronics Forum | Thu Aug 16 14:15:11 EDT 2007 | hussman
I agree with Doug. Stop the bleeding first, then find and stitch the wound up.
Electronics Forum | Mon Aug 13 08:04:43 EDT 2007 | davef
Search the fine SMTnet Archives [on gold finger], while you're waiting for others to reply. For instance: http://www.smtnet.com/forums/Index.cfm?CFApp=1&Message_ID=42759
Electronics Forum | Mon Aug 13 10:39:35 EDT 2007 | dphilbrick
If you can not find the source of cotamination then apply masking to fingers until you do find source, single layer of Kapton tape or similar should not affect print thichness. This will eliminate scrap / rework in the mean time.
Electronics Forum | Thu Aug 16 14:11:37 EDT 2007 | russ
Check all your conveyor belts and clamping in your machines. You have to follow these boards through entire process to see where it is coming from, it could be happening at a hand soldering operation as well. Russ
Electronics Forum | Mon Aug 20 09:33:25 EDT 2007 | stepheniii
Your lighting would have to be pretty bad for it to be an issue. My gut instinct tells me you have bigger systemic issues. Operators will either be your best friend or your worst enemy. What percentage of boards have contamination? You might have t
Electronics Forum | Mon Nov 13 02:37:36 EST 2017 | slah6678
Recently we facing the Golden finger reject due to contamination with solder after the reflow. Any solution for this kind of reject ?
Electronics Forum | Wed Nov 15 07:21:58 EST 2017 | stephendo
You don't clean contaminated gold fingers so much as you replace them. I once had the "cleaning" solution. It totally dissolved the gold fingers so that they could be replaced.
Golden State is a contract manufacturer that makes wire harnesses, electromechanical assemblies (box builds, subassemblies, PCBAs, kits, etc.) and services (sorting, rework, value additive manufacturing engineering)
18220 Butterfield Blvd
Morgan Hill, CA USA
Phone: 5102268155
.png)
