Electronics Forum | Fri Jun 18 14:22:03 EDT 2004 | James
I like Trace Racks, part # GFR-4. They are simple and compact but may not be good for larger boards. Under $10 each. 1-800-358-1400
Electronics Forum | Thu Aug 03 20:53:47 EDT 2006 | davef
Here is a DipTrace user group: http://finance.groups.yahoo.com/group/diptr/
Electronics Forum | Sun Aug 26 11:27:12 EDT 2007 | vangogh
Hi Davef, Thanks for the reply. There seem to be no issues on SMT reflow based on some samples done. We have not stripped the gold yet. We did a X-section+EDX and we are seeing traces of copper on the nickel layer. Any idea what is the implication of
Electronics Forum | Thu Apr 03 15:17:35 EDT 2008 | lakeside
Hi John, Check out Sierra Proto Express: http://www.protoexpress.com They have a microelectronics division that can do the 4 mil laser drill & they can get down to 1.25 mil space/trace. Hope they can help! Julie
Electronics Forum | Sat May 02 23:31:06 EDT 2009 | kareal
Thanks davef. The defect always occurred during UHAST reliability, but not find in reflow. The key is that there is tin diffuse to copper trace under solder mask. is it a "normal" board defect and what is the potential risk for device? thanks!
Electronics Forum | Fri May 08 04:39:32 EDT 2009 | kareal
Hi Davef, I want to explain that the tin diffusion in my project is not on solder bump/Pad region. It is on copper trace between bumps. so it is very wondering for me.
Electronics Forum | Fri May 08 09:44:23 EDT 2009 | davef
Board fabricators use solder as a resist to protect copper traces from process chemicals. Fabricators remove this resist in later processing. It's possible that board fabrication processing is the source of the tin that you see.
Electronics Forum | Tue Apr 27 18:33:35 EDT 2010 | smt_guy
what IPC Standard do I need in designing RF Boards that pertains to PCB Layout, Conductor width and spacings, Trace thicknesses etc... thanks and best regards,
Electronics Forum | Mon Jan 17 17:20:40 EST 2011 | dyoungquist
The cut can be as close to the component as you want as long as you do not damage the component or any surface mount pads/traces/through holes/internal pcb planes etc.
Electronics Forum | Tue Jan 10 13:51:32 EST 2012 | jdengler
Had you cleaned the inside of the machine just before this started? I once had an oven that was cleaned with some sort of oven cleaner and it contaminated PCB Assemblies when they ran it. This residue was not visible to the eye but caused soldering
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