Electronics Forum | Mon Apr 22 18:45:07 EDT 2002 | Steve Townsend
Chances are your profile is fine. There is probably too much paste on the descrete pads. Consider reducing the aperture size of the stencil. Good luck.
Electronics Forum | Mon Apr 29 03:01:53 EDT 2002 | Bob Willis
Had a similar problem recently where there were scatered balls and voids in joints and on the surface of the joints. The paste was dispenced from a cartridge with no kneeding or mixing before printing. The result was spitting and voids. Mixed the pa
Electronics Forum | Thu Apr 25 15:00:51 EDT 2002 | russ
Great info Dave!! Do you know what is meant by "foil"? I am really curious? Russ
Electronics Forum | Mon Apr 29 10:07:00 EDT 2002 | geoff_goring
I need to find out about tin/lead diffusion and how this causes solderability problems in device lead-outs. This is not to be confused with an earlier thread of Zn/Pb diffusion - unfortunately this is was a typo.
Electronics Forum | Thu May 02 07:11:10 EDT 2002 | davef
They probably the same. Most likely someone is saying immersion gold [immersion Au] as a short hand for ENIG [ Electroless Nickel - Immersion Gold]. It is very uncommon to plate gold directly on copper, because gold and copper form a brittle interm
Electronics Forum | Thu May 09 15:56:33 EDT 2002 | stownsend
We are using NC. Paste doesn't seem to have an effect on the solderability on a bad batch of ENIG. When ENIG has gone bad, throw the board out.
Electronics Forum | Wed May 08 09:40:33 EDT 2002 | Hussman69
One thing most over look is the time between the last reflow and the second print. You don't want to print on a hot board.
Electronics Forum | Wed May 15 09:46:15 EDT 2002 | davef
Francois: How much moisture does a typical reflow cycle remove from popular SMT packages?
Electronics Forum | Wed May 15 21:45:31 EDT 2002 | ianchan
Hi mates, any production floor controls that are efficient and effective? to control MSD. am talking about practical shopfloor "good mfg practices".
Electronics Forum | Thu May 16 15:31:50 EDT 2002 | cebukid
Sounds like this 'Hussmann ' character is taking credit for my findings again. You'd "fit right in" where I work. Heh he hehe hehe.
