Electronics Forum | Wed May 22 12:39:00 EDT 2002 | pwrgroup
and the two ratio is changed if you use different thickness sheet or step-down or step-up.I think real time calculator of the two ratio is very important for tranfer efficience.
Electronics Forum | Wed Feb 05 10:23:26 EST 2003 | russ
Are these the only packages that you could come up with Dave? What about all the rest? You're something else. Thanks for doing my work for me! Russ
Electronics Forum | Wed Feb 05 21:24:35 EST 2003 | davef
Stephen's correct. Radiased outer corners on 0402 pads really do seem to improve things. We aim to try "squared-up semicircles".
Electronics Forum | Thu Aug 27 16:44:11 EDT 2015 | esoderberg
I have that article. While some of the information is helpful, there is no direction as to the length and width of the step to achieve blade deflection to reduce paste.
Electronics Forum | Tue Apr 10 10:21:06 EDT 2018 | slthomas
Dave, that's a cool idea and sounds like something that would actually work. I'd be tempted to go with oversized pads to increase the holding force. Unfortunately as an EMS we would have to work that through the customer approval system and as usual
Electronics Forum | Tue Apr 10 10:33:08 EDT 2018 | davef
Oh, I just remembered the other thing that I wanted to mention ... Do the pads match the component leads?
Electronics Forum | Wed Apr 11 11:55:54 EDT 2018 | slthomas
Yes - every dimension that I measured on the gerbers checks out against datasheet. Presumably the parts match it as well....?
Electronics Forum | Mon Apr 16 16:24:20 EDT 2018 | slthomas
Amazingly enough, every one of these held fast where we placed them with a paste brick sized 1:1 with the thermal pad, no sectioning. Yes, there were voids, but we can live with that in this application.
Electronics Forum | Wed Apr 18 14:17:48 EDT 2018 | esoderberg
Further divide the ground block into more than 4 panes. Also think about using, assuming you have good placement of using Loctite chip bonder on two opposing corners. Lots of ways to get good results
Electronics Forum | Mon Apr 09 16:00:46 EDT 2018 | slthomas
Yes. I'm at a loss as to how to best approach this. I think the giant blob of solder is just going to behave more like a lubricant than anything else. The thing is, I would like to at least try the manufacturer's recommendation once (and this bui
