Electronics Forum | Wed Aug 25 19:44:35 EDT 1999 | Dave F
| Does anyone have any information on stencil aperture/pad ratios for noclean solder paste. In the past I have experienced severe solder ball problems when using the same size apertures from aqueous products as I do with the No-clean products. Cons
Electronics Forum | Fri Feb 09 01:41:46 EST 2007 | Muhammad Haris
CHECKS FIRST that your BGA doesn't tilt from pick & place machine. SECOND lead free paste have some problem that it solder the component whereever pick&place put the component while solder pastes having lead, put the component on its PCB pad like a
Electronics Forum | Thu Jul 20 12:23:00 EDT 2000 | Dave F
Bob: Please help us understand the effect of changing to lead-free solder paste on our processes better. Compare the following for tin-lead and lead-free solders: * Size of stencil apertures � amount of solder necessary for a reliable solder conne
Electronics Forum | Mon Nov 06 14:00:45 EST 2006 | nodlac
Checks calendar ...nope not April 1st. -The fresher the paste the better the solder joint. Agreed - My dilema here is upper management wants the two lines to share one stencil printer thus saving the cost of purchasing a second printer. They propos
Electronics Forum | Thu Oct 13 18:00:01 EDT 2011 | spitkis2
>We put paste on the board at SMT to solder them on initially. Then not when they get reworked? When assembling the board, solder paste is applied to the BGA and all other SMT pads since the stencil was fabricated with those openings. If the openin
Electronics Forum | Tue Jul 31 10:41:49 EDT 2001 | ronho
I'm interested in process information from someone who has experience with this package, such as pad design, stencil aperture dimensions, stencil thickness, unique issues, profiling, solder paste. Design is considering this package for future produc
Electronics Forum | Mon Dec 17 16:04:24 EST 2007 | ck_the_flip
Another tactic. Become friends with all the local solder paste reps, get them to buy you lunch, etc...but the key is...get them to give you free samples. That way you wouldn't have to BUY any paste. As for the original fella, sounds like he's on a
Electronics Forum | Tue May 23 09:50:37 EDT 2006 | flipit
They work well in silver conductive epoxy in hybrid applications. They are very poor in no clean applications. They don't work that well in OA solder paste either. Used them once in OA paste and in a nitrogen. They looked just fine. Solder to Pd
Electronics Forum | Thu Oct 30 11:34:51 EDT 2008 | davem
Guys, So I recently started working for a small CM in Southern N.H. We currently use 2 Magic Chef Mini wine friges to store the solder paste (63/37, RoHS). I've been monitoring the room temp (and humidity) and the frige temps all this week. The pro
Electronics Forum | Thu Feb 24 22:32:56 EST 2011 | rstadem
PKannan, Your opinion is contrary to J-STD-005 "Requirements for Soldering Paste". Within that document is included specific requirements for re-certification of expired solder paste. Paste that is expired can be used after a simple viscosity test an
