Electronics Forum | Wed Nov 15 12:52:21 EST 2017 | georgetruitt
IMO – Look into nano-coatings for your stencil and radius all square apertures This should help out with solder paste releasing from the stencil helping with insufficient solder QFN LGA aperture design, try a stencil cut with a few different apertur
Electronics Forum | Fri Dec 01 14:40:02 EST 2017 | emeto
Very interesting pictures. It shows paste height of 200um - which is at lest 6mil stencil deposit. That on the other hand posts another question. Can you measure the ground pad level in relation to the solder mask level with the SPI? I had assemblies
Electronics Forum | Fri Dec 01 15:06:54 EST 2017 | emeto
I am not sure that is doable. Ground Aperture is very small(for the stencil blade to get in there) and very close to the other apertures. I want to say the minimum requirement for step is 6mm clearance from other apertures for the stencil houses that
Electronics Forum | Tue Nov 14 08:52:07 EST 2017 | davef
If you think the problem is occurring in the box and it is wide spread, consider replacing your solder paste with your paste supplier. There are paste formulations aimed at the solder balling issue that some LF pastes create. On tuning your reflow r
Electronics Forum | Mon Nov 13 13:26:43 EST 2017 | rcooley4
Hi all, I'm in the market for a BGA rework machine capable of handling a wide range of PCB's, anything from little 2"X2" board up to 15"X15" back-plane boards that are 0.100" thick. I would like to find a machine that can remove BGA's & QFN's, clean
Electronics Forum | Sun Dec 10 20:17:51 EST 2017 | myke03o
Hi Dave, thanks for the response. * Improve your products that are used for thermal cycling testing of products of other companies? Yes we want to improve our products to pass thermal cycling and prolong the lifespan of the baord. * Change your pr
Electronics Forum | Fri Dec 01 05:59:55 EST 2017 | sarason
When you go repairing resources like one time copies of an installed OS for a machine like yours , you have to treat it like your life depended on it. So get a copy of the harddisk before you attempt to repair it no matter which methodology you use.
Electronics Forum | Mon Nov 27 22:01:25 EST 2017 | bibi11952
Hello SMTNet, We had received boards from our CM, some came with a Tin plated finish on the SMT hermaphroditic edge connector, while others came with Gold plated on the same connector. Tyco supplies both version and they apparently mixed up parts.
Electronics Forum | Thu Nov 30 22:11:25 EST 2017 | techedge
I have two KE720 P&P machines. I've been using one for the last several years on an irregular basis because we manufacture into a niche market and I don't (currently) contract out our services. Six months ago the working KE720 stopped working and I'
Electronics Forum | Tue Dec 12 12:03:39 EST 2017 | dleeper
A lot of it depends on what machines you are using and how well they implement dual lane feeders. A few general comparisons: Pros: -You can fit more feeders on your machines. -One dual lane feeder is cheaper than two single lane feeders Cons: -two
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