Electronics Forum | Fri Jun 26 14:08:49 EDT 2020 | indhu
Hi, I am having a issue that SMT nut drop after reflow. The solder height all in specifications. Had tried adding flux inand the solder paste. But shows no improvement. Is the nut easily oxidize? Can anyone help me on this?
Electronics Forum | Tue Jan 19 10:23:23 EST 2021 | grahamcooper22
Do any assemblers use AVX FLEXITERM components ? Anyone experience any instances where the devices look to have soldered well, but then when handling the pcbs, and maybe with a little bit of pcb flex..the CHIPS just drop/pop out the solder fillets ?
Electronics Forum | Wed Sep 01 08:27:38 EDT 2004 | davef
Zinc from the brass [Cu3Zn2] diffuses into the tin causing solderability problems. Just 0.001% of Zn in your solder can render it fit for the scrap heap. So, you need a barrier plate between the brass and the tin. Copper or nickel-plating is commonl
Electronics Forum | Mon Nov 30 21:50:14 EST 1998 | Earl Moon
| All y'll: I could use your input on determining when to skim dross from a wave solder pot. | | On one hand, dross protects the surface of the solder from oxidation. On the other hand too much dross may affect solder joint quality. On another ha
Electronics Forum | Mon Jun 13 21:08:12 EDT 2005 | davef
Paramjeet Singh Gill So, you underfil before cleaning. Interesting. * What is it about your underfill that prevents the OA flux from attacking the FC solder balls? * Who is the underfill fabricator and product? Getting back to your solder balling
Electronics Forum | Wed Aug 16 03:48:24 EDT 2006 | umar
Hi All SMT Net Team Member, I always have problem at MY SMT process and production side, Every time product running at my production side always found a lot solder Ball issue near the pad of SMT chip component. We had quite hard to do the trouble s
Electronics Forum | Wed Jun 17 16:00:47 EDT 1998 | Frank
| | Does any one wave solder the 0402 Chips on the bottom side of a board? | | Any comments? | You will need to use a curable epoxy at the site of placement before placing the 0402--then cure the epoxy...possible problems are epoxy intrusion on the
Electronics Forum | Tue Aug 13 15:55:10 EDT 2002 | jseagle
I am looking for advice on purchasing a used '98-'00 Electrovert Electra wave soldering machine. Are there any specific parts of the machine I should closely inspect? Any specific options I should make sure it has? I will need it to have a spray f
Electronics Forum | Thu Jul 05 08:11:45 EDT 2007 | naynayno
This is wave soldering process and design question since most folks associated with SMT are processing mixed assemblies. We have a 3-leaded sensor (radial) with such a tight pitch always bridges. Solutions unders disussion are pre-forming and addin
Electronics Forum | Tue Sep 22 12:25:31 EDT 1998 | Chrys
| | Hi Jacqueline! | | Do these joints that you're having problems with happen to be on fine pitch solder joints? Are the fillets staying attached to the foot and separating from the pads cleanly? | | If that is true, are there many vias concen
