Electronics Forum | Thu Mar 02 07:38:58 EST 2000 | Roni Haviv
Hello, I had experienced this kind of problem; Because the Au film is very thin (flash gold..) it is sometimes porositive and the Ni barrier below get Oxidation. After reflow there seems to be good solder fillets (visualy perfect!) but the leads wit
Electronics Forum | Fri Oct 13 07:25:48 EDT 2000 | yeo
Any one have any experience on solder fillet problem on 0603 chip capacitor ? The phenomenon is solder wetting on one terminal is very good and totally no solder wetting on the other terminal. The positing of capacitor is right at the centre of the
Electronics Forum | Thu Mar 02 07:38:58 EST 2000 | Roni Haviv
Hello, I had experienced this kind of problem; Because the Au film is very thin (flash gold..) it is sometimes porositive and the Ni barrier below get Oxidation. After reflow there seems to be good solder fillets (visualy perfect!) but the leads wit
Electronics Forum | Thu Mar 22 08:54:06 EST 2001 | dblsixes
I'm not familiar with Laser Soldering. I don't believe it to be a problem with the QFP themselves, since the two plastic parts are from different vendors in the same package. We also are having similar problems with other plastic parts on other boa
Electronics Forum | Wed Aug 15 08:05:44 EDT 2001 | wbu
Oh boy, I prefer the fillet at heel of course, the toe you can�t trust. The solderable finish of the leads is applied and than the leads are cut leaving the toes without this so much loved finish. guess how that looks after you�ve finished your job.
Electronics Forum | Wed Aug 04 17:16:13 EDT 2004 | Richard
Can anyone comment on inspection criteria for PIH applications. I'm of the opinion that the inspection criteria used for wave soldered joints should be used for PIH. Some colleagues believe that a bottom side fillet is not necessary since the solde
Electronics Forum | Mon Sep 26 20:10:58 EDT 2005 | Anna
What type of alloy and at what temperature do you use for wave soldering? Do you need to modify your machine? I am using SCN but I have problem controlling my bath. Are you running on multilayer board or PTH boards? Do you face any fillet lifting
Electronics Forum | Wed Aug 03 21:29:59 EDT 2005 | Ken
Yes, lead can promote fillet lift. In order to understand this defect you must begin looking at your lead frame mateials. some lead frames are more susceptable to this disorder. This is most likely a cte mismatch disorder. Lead contamination in
Electronics Forum | Thu Mar 23 22:26:53 EST 2006 | Joseph
Dear all, Referring comment from Mr. Jack,IPC director certification & assembly technology, the term "fillet tearing" is too broad. Cracks or fractures in the required fillet area, with SnPb or LF alloy and whether you call it tearing or not, is a D
Electronics Forum | Mon Dec 18 08:52:57 EST 2006 | russ
You need to get yourself a copy of IPC 610. this has all the specs regrding placement and registration. chip aprts are allowed to have 50% side overhang. the fillet requirements are "evidence of wetted fillet" . I would not know if a cap being 51
