Electronics Forum | Wed Sep 17 04:15:23 EDT 2003 | C Miller
The magnetic thing from the sot23 thread made me think of somthing from the past. Does anyone have any experience with vibrating boards during reflow? I know for a fact that if you vibrate a board during reflow it will alow the parts to "float" and
Electronics Forum | Wed Jun 13 15:40:44 EDT 2007 | slthomas
Edited because I completely misinterpreted your post. We used 2 lengths of Durapol with slots for the board edges and a shorty (free-floating, not attached) under the middle. Not much more elaborate than your titanium shims but we had it laying aro
Electronics Forum | Mon Feb 22 10:01:01 EST 2010 | jtsyeung
Since the inductor is electro-magnetic, that means the device is composite of coil and ferrite metal. The inductor inside the reflow oven meets with blower motors which close to the inductor and generate magnetic field. With such conditions, Lawren
Electronics Forum | Fri Dec 10 09:47:52 EST 1999 | Larry
What does everyone use for stencil apertures on D Paks? What's the best way to keep them from floating during reflow?
Electronics Forum | Wed Oct 11 13:26:59 EDT 2023 | cyber_wolf
Its highly doubtful that stencil design will fix this. The Inductor floats during reflow and ends up going where it wants to go. The only way you are going to keep it in place is to put a dot of chipbonder beneath it or change the size of the lands
Electronics Forum | Wed May 10 22:53:18 EDT 2000 | Tan Kheng Beng
The Cpk collected by placement on glass boards and calibration has been done. All has been fine until we actually try on actual boards with printing. We have problems like insufficient solder due to closed aperture, improper flow of solder on the pad
Electronics Forum | Fri Oct 09 00:57:05 EDT 2009 | jjmag921612000
SteveO, I had personal experience with this using a Panasonic MPAV2B. It took a while, but I believe the end result was to have some additional "Z" travel to press the QFN into the paste. Also, the design of the paste on the ground was key to keep t
Electronics Forum | Thu May 01 11:56:04 EDT 2008 | realchunks
It sounds like this part is floating on your solder joint during reflow. You may need to redesign your pad geometry. In general with this type of clip - smaller pads are better. If you cannotcahnge pad size, try changing the openings on your stenc
Electronics Forum | Fri Nov 17 15:04:59 EST 2006 | ehess
WE have a problem with a DPAK component floating during reflow, causing it to move to the point where it affects the toe fillet. We have been using a dot of SMT epoxy to hold it secure for the moment. I have looked on many sites, but no whrere can
Electronics Forum | Fri Jun 10 19:42:46 EDT 2005 | ktron
Thank D.B. Cooper, actually this LED has 3 sides termination but no termination at underneath of LED. So this LED tends to float rather than performing solder joint during reflow process.
.gif)
winsouce.jpg)