Electronics Forum | Thu Aug 09 07:53:16 EDT 2012 | davef
Allowable bow & twist: Together, both IPC-A-600G and IPC-6012B represent the core IPC documents for describing the acceptable and nonconforming conditions that are either externally or internally visible on finished printed boards. IPC-A-600G relies
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.
Electronics Forum | Tue May 01 20:40:38 EDT 2018 | sarason
In the past I have worked on 600 Amp FET Blocks. The rule was no voids. The circuit board would be heavy copper. 4 times normal plating time. Not particularly high resolution on the board say 20 mils. To help with the heavy plating. The boards were t
Electronics Forum | Fri Mar 17 21:38:55 EDT 2017 | jlawson
I think the main driver is MTBF data driven by the Car OEMS, mainly german makers pushing this onto suppliers in supply chain. Vacuum soldering and void reduction is a hot topic for the leading electronics suppliers in Germany at the moment. Is not r
Electronics Forum | Sun Jun 06 12:51:34 EDT 2010 | whitewing
Hi - I'm looking into possible low-end pick/place machines (in UK) for prototype/small runs - taking the next step from plastic stencil/hand place/pizza oven, as my local subcontractors can't offer the fast turnrounds I often need for short runs. Bud
Electronics Forum | Thu Jan 19 09:41:47 EST 2012 | charliedci
We have the same issues with QFN's on reels being cost prohibitive, so we also have to deal with tubes. We have had some luck with using a modified tube ran down (almost to the pick position) the channel of a belt feeder, assuming the QFN tube/channe
Electronics Forum | Thu Jul 31 10:14:27 EDT 2014 | matusov
I know that some board houses have better > capability than others. Some can do down to 4mils > mask in between the leads I think. I know that it > also depends on the type of the mask they are > using - for some types you can't go down to the >
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