Electronics Forum | Tue Mar 14 14:13:14 EDT 2017 | cyber_wolf
I don't have an answer but I am curious. What data/testing shows that this voiding is detrimental? How did the auto industry arrive at
Electronics Forum | Wed Mar 15 06:58:43 EDT 2017 | cyber_wolf
Rob, That's what I suspected but I would be interested to see studies that show that the voids are in fact detrimental to thermal and electrical performance. If the automotive industry is requesting
Electronics Forum | Wed Mar 15 10:12:22 EDT 2017 | pzappella
Hello, A speaker at the conference is where I heard that the auto industry wants
Electronics Forum | Thu May 18 07:25:25 EDT 2023 | potprepare
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Electronics Forum | Wed Mar 28 15:26:10 EDT 2018 | dleeper
one caveat to be aware of is the power requirements of many machines. Most 'industrial level' pick and place machines, as well as reflow ovens will require 3 phase power. it sounds like you are trying to set this up in an office type environment. Do
Electronics Forum | Tue Mar 14 14:15:03 EDT 2017 | dontfeedphils
I've always been happy with ~25% or less combined voiding on QFN ground pads (depending on the pad dimensions).
Electronics Forum | Wed Mar 15 11:43:45 EDT 2017 | rob
Hi PZ, What, sort of like this one? http://creativeelectron.com/papers/EconomicsofLEDVoiding.pdf It even has the handy calculation for the reduction in thermal performance with voiding.
Electronics Forum | Wed Mar 15 11:51:35 EDT 2017 | cyber_wolf
Rob, I believe that is for die attach voiding not solder interface.
Electronics Forum | Wed Mar 15 12:05:24 EDT 2017 | emeto
Rob, Absolutely agree. Customer precedes standard. As you mentioned design engineers, I think that PCB design has the biggest influence on the voiding. Everything else we do is trying to fix bad PCB design.
Electronics Forum | Wed May 31 07:55:55 EDT 2017 | buckcho
In IPC it is said that the void % should be established between you and the customer. There is no number. There is only requirement for balls on BGA. I have a customer that agreed to 40% on D-packs which is okay for both us and them.
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