Electronics Forum | Thu May 21 09:54:07 EDT 1998 | Justin Medernach
| I'm reviewing my board fab spec. It calls for a minimum SnPb thickness of 50 microinches on HASL PWB's. I've looked at other specs that call out anything from 30 to 80 microinches, and others that just say the copper pad must be covered and solde
Electronics Forum | Tue Mar 31 05:26:14 EDT 2009 | d0min0
Hello, we had similar problem in the past - when we had to change PCB supplier from a batch of hundreds of boards (NiAu plated, SnPb process) we got 2-3 boards with paste wicking to components leads what we did, was to check the thickness of gold on
Electronics Forum | Wed Feb 04 06:26:20 EST 2009 | sachu_70
Hi Peter, The defect you observe during the second side reflow could be caused due to improper Au plating thickness in the PCB fabrication process. You can refer IPC-2221 wherein plating thicknes for ENIG mentions 0.08um to 0.23um for Immersion Gold,
Electronics Forum | Mon Dec 22 16:09:02 EST 1997 | Justin Medernach
| I am designing an SMT pad for a ss metal switch. | Finished copper thickness is .0014 and nickle-plating | originally is 150 millionths. Initial testing yields 100,000 to 150,000 switches before intermitent failures (copper is reached.) I want 50
Electronics Forum | Tue Feb 03 16:42:50 EST 2009 | cuperpeter
Hello All, > > I have a problem with nonwetting Au > finish after second cycle of reflow soldering > doublesided boards. Solder nonwetted pcb pads (is > wicked to component terminations) Either these > pads or some of non component pads became
Electronics Forum | Sun Jan 25 17:40:16 EST 2009 | cuperpeter
Hello All, I have a problem with nonwetting Au finish after second cycle of reflow soldering doublesided boards. Solder nonwetted pcb pads (is wicked to component terminations) Either these pads or some of non component pads became discoloured from
Electronics Forum | Tue May 26 20:18:09 EDT 1998 | Justin Medernach
| | | | I'm reviewing my board fab spec. It calls for a minimum SnPb thickness of 50 microinches on HASL PWB's. I've looked at other specs that call out anything from 30 to 80 microinches, and others that just say the copper pad must be covered and
Electronics Forum | Tue May 26 14:50:07 EDT 1998 | Dave F
| | I'm reviewing my board fab spec. It calls for a minimum SnPb thickness of 50 microinches on HASL PWB's. I've looked at other specs that call out anything from 30 to 80 microinches, and others that just say the copper pad must be covered and sol
Electronics Forum | Tue May 26 21:27:33 EDT 1998 | Earl Moon
| | | | | I'm reviewing my board fab spec. It calls for a minimum SnPb thickness of 50 microinches on HASL PWB's. I've looked at other specs that call out anything from 30 to 80 microinches, and others that just say the copper pad must be covered a
Electronics Forum | Wed May 27 11:19:34 EDT 1998 | Earl Moon
| | | | | | I'm reviewing my board fab spec. It calls for a minimum SnPb thickness of 50 microinches on HASL PWB's. I've looked at other specs that call out anything from 30 to 80 microinches, and others that just say the copper pad must be covered
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