Electronics Forum | Tue Oct 17 17:27:08 EDT 2006 | adlsmt
Define "pretty easily". Did anyone ever do whatever is making them fall off now before? In most casses where a component "falls off" then someone implements a totally subjective test to make sure the rest of the parts wont "fall off" they damage a lo
Electronics Forum | Tue Oct 17 15:31:29 EDT 2006 | TM
I've got some MELF packages that reflow and connect but later fall out of the solder pretty easily. We are not using epoxy but, the parts have fillets per IPC standards. We have not looked at cross-sectioning for IMC and don't plan to at the moment
Electronics Forum | Wed Oct 18 08:00:53 EDT 2006 | davef
Have you tested the solderability of the inbound components per ANSI/J-STD-002, Solderability Tests for Component Leads, Terminations, Lugs, Terminals, and Wires?
Electronics Forum | Tue Aug 11 09:52:53 EDT 2015 | rgduval
I assume that these parts are falling off during second-side reflow? The easy solution, of course, is to not build high-mass components on first-side reflow. If this isn't practical, however, you can try using epoxy/glue under the component. We'
Electronics Forum | Tue Feb 11 04:08:51 EST 2020 | majdi4
we have a problem : The connector is falling down in the second reflow. This connector is mounted in the first side. You can find attached the reflow profil we work with and a photo of the connector. We tryed with under_film but the connector is sti
Electronics Forum | Mon Feb 24 01:40:05 EST 2020 | sarason
Traditionally these connectors are riveted to the board on higher volume telecommunication applications. sarason
Electronics Forum | Mon Jun 14 11:44:10 EDT 1999 | Vince Gedgaudas
Has anyone had issues where bottomside double reflowed smt has fallen off in the wave when using voc-free flux? I have verified the hotter profile was not the issue by using an alcohol based flux with no problems.This voc-free flux is also not causin
Electronics Forum | Tue Feb 11 07:35:03 EST 2020 | dontfeedphils
If all else fails, you can always chipbond the part. Would it be possible to run this side as the second reflow?
Electronics Forum | Wed Feb 12 07:25:47 EST 2020 | dontfeedphils
If you have control of the solder alloy you're able to use on the product, you could run a lower temp solder on the second side and try to avoid the first side entering reflow.
Electronics Forum | Wed Feb 12 08:10:49 EST 2020 | majdi4
We can't do that because we are using dual ligne reflow oven..So the two sides of PCB are soldered with the same reflow profil.
.gif)
