Electronics Forum | Tue Oct 15 11:16:30 EDT 2019 | charliedci
We have been using Cree 3 color LED's (CLV6A-FKB) in many products for several years (pic attached). At the rate of 3 to 5% of the units assembled with this LED, the Red LED fails. After touch up with soldering iron it functions. This happens to the
Electronics Forum | Wed Dec 04 16:31:23 EST 2019 | kylehunter
Hmm, OK thanks for the input guys. Yeah, I'm surprised because our profile seems pretty solid, and it is such an isolated issue. I like the thought of the flux drying out as a potential cause. It was definitely exposed to the air, and while we tried
Electronics Forum | Tue Feb 11 11:40:21 EST 2020 | emeto
Sebas, on your profile you have listed U2, U101, U102 and I was wondering if the questioned part is one of them. I attach a typical profile specs - you should follow the one for your paste. In the one you attached the slope is too fast, soak is prob
Electronics Forum | Tue Feb 25 12:15:42 EST 2020 | dwl
Are you running a no clean process, or are you washing your PCBs? One caveat with ENIG is sometimes washing with hot DI water can effect solderability later on. I would also talk to your solder technicians and see what their preference is. Some pr
Electronics Forum | Fri Apr 03 15:49:55 EDT 2020 | unisoft
Yes agreed you're 100% right on that. You always want to go for the full CAD file or the XY rotation file first. But like a lot of contract manufacturers and some OEM's find they have to work with Gerber only data for certain projects. The Unisoft s
Electronics Forum | Thu Sep 17 15:21:50 EDT 2020 | lpbro
For height, I start +-2mil usually. For 3mil stencils, my lower limit starts at 1.5mil, upper is 5. If the area is chem ethed, I normally add .5 to the stencil height. My default volume is 60 - 160%. Then print specs are adjusted till I see fit, then
Electronics Forum | Wed Apr 21 16:59:49 EDT 2021 | compit
Hello. I want two elements to be PERMANENT at the back (e.g. position 107 and 114) and the rest at the front. Unfortunately optimization always "adds" other elements to the rear, even though I choose the preference at the front. Setting elements as "
Electronics Forum | Thu May 13 20:00:26 EDT 2021 | glasscake
How are you specifically reflowing the boards now? You say convective reflow is not repeatable/suitable for a robot(which I'm not sure is true but I do not know what you mean by for a robot) but you also say that you are using "the fastest hot air
Electronics Forum | Thu Aug 19 20:28:27 EDT 2021 | stephendo
We have it set up in our ERP system. When it produces the Work Order it adds whatever extra parts we say. And we have a relatively inexpensive system I would think most systems for electronic manufacturing would have that ability. A few lifetimes
Electronics Forum | Thu Oct 14 14:11:33 EDT 2021 | SMTA-64387257
Hi All, We are currently looking to add an Xray inspection system into our process. We build high density assemblies with ultra fine pitch BGAs, 0201's, QFN's and every package type one can think of. We would like to use the inspection system to v
