Electronics Forum | Fri Aug 07 03:16:33 EDT 2020 | rsatmech
It's a BGA component. Missing ball is not possible because we have enabled the vision in pick and place. Solder paste is OM353 type 5 Possibilities of Flux dry before reflow seems valid but I saw the board data it was completed on time like other
Electronics Forum | Wed Dec 04 16:31:23 EST 2019 | kylehunter
Hmm, OK thanks for the input guys. Yeah, I'm surprised because our profile seems pretty solid, and it is such an isolated issue. I like the thought of the flux drying out as a potential cause. It was definitely exposed to the air, and while we tried
Electronics Forum | Thu Jan 27 17:54:37 EST 2000 | Steve Harshbarger
Casimir, I have seen exactly what you are experiencing with the Kester 958 on other wave lines. No clean fluxes vary in how much flux residue is visually left behind. These no clean residues are typically not harmful to the PCB, but they are often
Electronics Forum | Mon Apr 25 19:24:01 EDT 2022 | davef
I agree with ProcEng1 that using a capped PVC pipe filled with flux is a good way to keep flux stones from drying out while in storage
Electronics Forum | Wed Oct 11 22:23:39 EDT 2006 | billwestiet
I've installed a number of these machines here in the US, several of them with VOC free applications. I would need to get a bunch of questions answered before I could make any suggestions: What is the pcb width? length? conveyor speed? flow rate (mm
Electronics Forum | Sat Aug 28 19:31:36 EDT 2004 | ryufoong
Currently, in my working factory, we facing the flux residue remain on connector after washing. (of course, this is clean process with WS solder paste). So, are there any ways to clean the flux residue rather than go back to wash again? Because wash
Electronics Forum | Wed Dec 04 10:59:04 EST 2019 | dwl
The solder looks a little grainy for Sn/Pb solder but that might just be the picture quality. There appears to be plenty of solder on the pads, so I'd rule out anything to do with the stencil. One possibility that springs to mind; how long is your
Electronics Forum | Tue Nov 19 15:08:45 EST 2002 | steve
Be careful, if you are using a water soluble chemistry then your pre-forms that are impregnated with flux may dry out prior to use. If your using a no-clean application then ther should be no worries. Aim solder out of Rhode Island is very good with
Electronics Forum | Fri May 15 14:41:25 EDT 1998 | Terry Burnette 512-933-5783
| We had some failures on an IC package that the manufacturer has put down to moisture inside the package, leading to popcorning. | This seems a bit odd, the package is a PLCC 84 which is quite thick. I have only seen this problem on thin packages. |
Electronics Forum | Fri Aug 17 09:32:36 EDT 2012 | jeremymek
I would advise against using IPA for stencil cleaning It may initially seem to produce good results but the way it works you end up with more problems. IPA is good at removing liquid fluxes but it dries out and cements solid fluxes to the stencils
