Electronics Forum | Wed Aug 23 10:04:24 EDT 2006 | blnorman
We have seen leakage currents around parts that have high impedance. Evidently with a small amount of moisture, weak organic acids present in the flux residue can cause a low leakage.
Electronics Forum | Tue Oct 12 16:38:24 EDT 1999 | Charlie
At present the band-aid fix is using epoxy 'dam' under the part and masking over the part to pervent excessive current leakage conmonent failure. These parts are first going through the reflow oven, where the epoxy dam is used to over come the leakag
Electronics Forum | Fri Aug 11 16:19:39 EDT 2006 | T. Oaks
Hi, We have a issue with current leakage between pins on an SSOP 28 in a low frequency RF application and there is a suspicion that it is being caused by something in the flux residue. We have had the bad boards analyzed and a 'high' Chloride level w
Electronics Forum | Mon Jan 11 09:15:36 EST 2010 | lynn_norman
In a former job we had issues with leakage currents on a QFP. The component was acting as a thermal shield leaving a lot of flux residue behind. To make it worse, the flux solvent wasn't totally evaporated, so we had ionic residue, a fluid media, a
Electronics Forum | Fri Jun 07 12:34:30 EDT 2019 | teejsd
C3 just uses heated DI water that it applies, then pulls back into a disposable cartridge. Machine then applies a 10V charge to the sample & measures leakage current(nA,I think) over time(sec). If the leakage current is high enough/fast enough, you
Electronics Forum | Mon Sep 08 05:23:11 EDT 2008 | milas
Hi We are designing a new pcb which contains sensitive analogue circuitry, where tiny leakage currents could dramatically affect product performance. Should I build this product Clean or a No-clean chemistry set ? Thanks in advance
Electronics Forum | Fri Apr 11 11:26:09 EDT 2003 | Brian W.
Cracked capacitors usually are not found at ICT. Unless the cap is completely cracked, the capacitance may not change much, and the usual failure mode is a leakage current. This is usually only seen in ESS type testing, when temperature and humidit
Electronics Forum | Mon Jul 16 21:29:03 EDT 2001 | davef
Cleaning RMA with water is bad news. It will turn your solder connections white and remove none of the RMA residues. There was a thread on removing RMA within the past two weeks on SMTnet. Check the fine SMTnet Archives. Additionally, look at M
Electronics Forum | Sat Sep 25 08:59:59 EDT 2004 | davef
IPC-HDBK-830, Guidelines for Design, Selection and Application of Conformal Coatings says: A conformal coating may have several functions depending on the type of application. The most common are: * Inhibit current leakage and short circuit due to h
Electronics Forum | Sun Sep 02 09:06:42 EDT 2018 | davef
Cold resistance between the tip of the tool and the ground reference, tip current leakage, and tip voltage. per ANSI ESD STM 13.1 J-STD-001 Rev G, Appendix “A” Guidelines for Soldering Tools and Equipment: A-2 BENCHTOP AND HAND SOLDERING SYSTEMS Se
