Electronics Forum: contamination on immersion gold (Page 1 of 11)

Solder contamination on Golden Finger

Electronics Forum | Mon Aug 13 08:04:43 EDT 2007 | davef

Search the fine SMTnet Archives [on gold finger], while you're waiting for others to reply. For instance: http://www.smtnet.com/forums/Index.cfm?CFApp=1&Message_ID=42759

Re: Black spots on gold finish pads.

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

Re: Black spots on gold finish pads.

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

Re: Black spots on gold finish pads.

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

Re: Black spots on gold finish pads.

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

Re: Black spots on gold finish pads.

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

Re: Black spots on gold finish pads.

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

Solder on gold finger

Electronics Forum | Thu Jul 20 05:04:30 EDT 2006 | bing007

We had a similar problem with gold contact pads. Cleanliness is paramount. If you are using foil tensioning system, wash the foil in a stencil wash before use as the cardboard cassettes may be contaminated. Be very careful when loading into a frame f

gold finish on pcbs

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?

Solder on gold finger

Electronics Forum | Sun Jul 26 20:56:43 EDT 1998 | Masdi Muhammad

We are trying to reduce the number of units fail at system test due to flux on gold finger. We know so far that the flux is deposited onto the goldfinger during touch-up or rework and to reduce the contamination we are planning to implement 'tapin

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