Electronics Forum: enig and thickness and black and pad (Page 1 of 1)

black and grey pad

Electronics Forum | Sat Oct 06 08:42:21 EDT 2001 | davef

Please give us additional background on your board, solder, process, etc. If you are talking about black pad in ENIG solderability preservative, check the fine SMTnet archives to get started.

force between the pad and laminate material

Electronics Forum | Mon Jun 17 13:45:29 EDT 2002 | genny

When the pad comes off, is it leaving behind a "black" area? Your board may be suffering from black pad - a condition that occasionally affects ENIG finish boards. It is a process control issue with your board fabricator. The nickel is oxidising b

Immersion gold and BGAs

Electronics Forum | Fri Aug 26 09:57:21 EDT 2005 | russ

The Immersion gold is not a problem with BGAs specifically but "black pad" which can be present anywhere. The unfortunate thing with BGAs is you cannot see it. Personally I hate white tin. It is okay for single sided boards running no-clean, but c

Criteria for Min Thickness regarding Large and Small pads

Electronics Forum | Sun Jun 29 15:03:04 EDT 2008 | jensteele

I was referring to the HASL supplied by the supplier...specifically Lead Free HASL. I've been searching the web and I cannot find a thickness specification like we have for ENIG and Immersion Silver.

what is the different between ENIG and Immersion Au

Electronics Forum | Thu Jan 12 02:08:47 EST 2006 | adeline_ko

Hi, What is the different between Electroless Nickel / Immersion Gold (ENIG) and Immersion Au. Are they refer to the same finishing? We has been using the Gold thickness (0.00005 - 0.00013mm) , nicket (0.0025mm) for all Gold finishing brd (Immersio


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