Electronics Forum: oxidation pcb (Page 1 of 22)

PCB oxidation

Electronics Forum | Thu Jun 09 14:45:21 EDT 2011 | kahrpr

Does the board look like that before Reflow?

PCB oxidation

Electronics Forum | Fri Jun 17 13:51:21 EDT 2011 | mosborne1

Your problem is at your board house with the finish. There is not enough tin deposited on the ground plane. Could be the current density too low on the ground plane. If electroless they just didn't process these correctly. What is the finish suppose

PCB oxidation

Electronics Forum | Wed Jun 08 13:49:48 EDT 2011 | sonofptolemy

Hello, I am having a problem with HASL PCB's after it comes back from the stuffer. To me it looks like oxidation and it causes poor wetting. This leads to a bunch of problems all of which have different symptoms but the cause is this oxidation proble

PCB oxidation

Electronics Forum | Thu Jun 16 17:02:40 EDT 2011 | boardhouse

The finish looks like Immersion Tin or Silver. if its lead free Hot air - could be issue of to high of a Tin Content. find out what brand of Hasl they are using. SL100 Example. Is this tarnished look only being seen after assembly or have you seen

Floor life pcb assembly

Electronics Forum | Wed Apr 23 19:00:39 EDT 2008 | stevek

It depends on the laminate but a PWB is like any other MSL component. Some fab shops are only waranting standard FR4 laminates for 45-60 days when processed at lead free temperatures. The best thing I can say is to try some weight gain/loss experim

Desiccants and pcb finish degradation?

Electronics Forum | Tue May 15 21:57:06 EDT 2001 | davef

Welcome!!! Where the hay ya been??? Sorry bud, were lining-up with your fab [it hurts me to say that, but when yer  ] We used to dry pack with desiccants, also. Its probably an old MIL-STD-2073-1C requirement [er something like that]. We qui

Desiccants and pcb finish degradation?

Electronics Forum | Wed May 16 08:48:12 EDT 2001 | ohboy

I been a bunch o' places...! Some good, some bad, re-inventing the wheel in many cases. Our specs are pretty specific in a lot of cases, but that doesn't mean they always get followed. It usually becomes a case of "It's not quite right, but we rea

SN/PB soldering with gold plated pcb

Electronics Forum | Tue Apr 26 11:22:48 EDT 2005 | denismeloche

I have found that Sn62 solder gives better strength and leach resistance when soldering to gold surfaces. The gold needs to be at least 5 to 10 micro inches thick to prevent nickel oxidation but if over 25 micro inches will cause brittleness. I hav


Electronics Forum | Sun Mar 07 08:33:37 EST 2010 | joseph_smile


Oxidation on PCB's

Electronics Forum | Fri Aug 08 23:31:45 EDT 2008 | hanward

Hello,man,we are a PCB manufacturer.I can ask our engineer and reply you.

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