Electronics Forum | Thu Nov 09 23:27:53 EST 2000 | Craig
We are considering using gold plating on our fine pitch pcbs (as oppossed to HASL). We have heard of long term solder reliability problems with joint imbrittlment how bad is this and does it apply for all of the different plating processes the same?
Electronics Forum | Fri Nov 10 17:44:48 EST 2000 | Dave F
In response to your questions: Is the embrittlement from excess gold in lead / tin solder connections bad? It can be vereeee bad. Does it affect all plating processes the same? Give us a break and read the SMTnet Archives, for instance: BGA prob
Electronics Forum | Mon Nov 30 23:45:20 EST 1998 | Kallol Chakraborty
Hi folks , Lately we are seeing a lot of rawcards with black spots on the pads - most of them have Au finish(immersion gold) . We did a lot of inspecton after wave solder and found that only (fine pitch) QFP are affected the most. Our inspection /te
Electronics Forum | Tue Dec 01 07:24:44 EST 1998 | Earl Moon
| Hi folks , | Lately we are seeing a lot of rawcards with black spots on the pads - most of them have Au finish(immersion gold) . We did a lot of inspecton after wave solder and found that only (fine pitch) QFP are affected the most. Our inspection
Electronics Forum | Tue Dec 01 07:54:49 EST 1998 | kallol chakraborty
| | Hi folks , | | Lately we are seeing a lot of rawcards with black spots on the pads - most of them have Au finish(immersion gold) . We did a lot of inspecton after wave solder and found that only (fine pitch) QFP are affected the most. Our inspec
Electronics Forum | Tue Dec 01 09:02:18 EST 1998 | Earl Moon
| | | Hi folks , | | | Lately we are seeing a lot of rawcards with black spots on the pads - most of them have Au finish(immersion gold) . We did a lot of inspecton after wave solder and found that only (fine pitch) QFP are affected the most. Our in
Electronics Forum | Fri Dec 04 20:26:34 EST 1998 | kallol Chakraborty
| | | | Hi folks , | | | | Lately we are seeing a lot of rawcards with black spots on the pads - most of them have Au finish(immersion gold) . We did a lot of inspecton after wave solder and found that only (fine pitch) QFP are affected the most. Ou
Electronics Forum | Fri Dec 04 20:37:45 EST 1998 | kallol chakraborty
| | | | | Hi folks , | | | | | Lately we are seeing a lot of rawcards with black spots on the pads - most of them have Au finish(immersion gold) . We did a lot of inspecton after wave solder and found that only (fine pitch) QFP are affected the most
Electronics Forum | Wed Jan 19 19:14:12 EST 2022 | charliedci
Looking for opinions on pic attached of ENIG finish. appears to be over-etched gold, but I am not trained up on PCB fabrication.
Electronics Forum | Thu Jan 20 21:29:48 EST 2022 | stephendo
Copper gets etched in a photographic manner. ENIG is an additive process. Nickel gets added then gold gets added on top. Therefore it is not a matter of over etching. It is a matter of not enough gold added. The layer of gold ideally is as thin as po
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