Electronics Forum | Thu Jun 13 02:40:16 EDT 2002 | jax
Is the short apparent prior to reflow?
Electronics Forum | Wed Jun 12 22:35:03 EDT 2002 | jkhiew
We had alot of problem with melf diode short together after reflow soldering. The clearance is about 0.8mm & we used "v" shaped opening . PLease comment !
Electronics Forum | Thu Jun 13 03:15:01 EDT 2002 | jkhiew
Hi Jax, After component placement, all melf diodes being checked & found no touching each other. Unfortunately, after reflow those MELFs are shorted.
Electronics Forum | Thu Jun 13 11:25:40 EDT 2002 | davef
Help us understand your situation by telling us about: * Is this a terminal-to-terminal short on a single MELF? Or is this a terminal-to-terminal short between or than one MELF? * Clearance of 0.8mm is the distance between what features? * Size ME
Electronics Forum | Thu Jun 13 05:46:34 EDT 2002 | jax
After reflow, Are the end terminals of the melf packages touching or is it a paste bridge? What type of reflow are you using? IR?... Convection?
Electronics Forum | Thu Aug 30 19:58:24 EDT 2012 | warwolf
What is the actual function of the shortwave IR in the wave machine process? Is it just another heat source?. i know it can apply a lot of heat in quick cycles and has ‘penetrating heat’ but is that it? seems a bit too simple.
Electronics Forum | Thu Jun 13 21:44:21 EDT 2002 | jkhiew
Hi all, * Defect : termial to terminal touching btw two melfs body that created short circuit. * Clearance : 0.8mm btw two melfs body. * Size melf : diameter=2.4mm to 2.7mm, length=4.8mm to 5.2mm * Stencil opening : "v" shaped to minimise component
Electronics Forum | Thu Aug 30 20:35:51 EDT 2012 | davef
A common bottomside heater configuration is IR-Convection-Convection. One of the big advantages of the IR zone is its ability to allow the flux carrier to spread and dry slowly before the board reaches the convections zones, which can blow wet flux c
Electronics Forum | Fri Jun 14 14:25:05 EDT 2002 | davef
Good job clarifying things. So, your MELF are just rolling off the pads. So much for the rocket scientist that talked you into those �V� shaped apertures, eh? [Or taking it the other way: Wow, just think how bad it would be if they weren�t worki
Electronics Forum | Sat Jun 07 04:01:56 EDT 2008 | carmanah
Hi all, Need advice how to fix RJ45 short issue after wave solder m/c .Few actions taken to resolve this issue but the outcome was inclusive which was 1. Modify wave pallet 2. Change conveyor setting from 0.8meter/minute to 0.7 meter/minute 3. Clear
