Electronics Forum: qfn and vias (Page 5 of 17)

Via holes and Wave Solder

Electronics Forum | Mon Mar 13 12:53:21 EST 2006 | slthomas

"Surely this is a job for Wavemaster Larry?" I know this is supposed to be a serious forum, but that's some funny stuff! 8 mil stencils. Suuuuure.

Juki pick and place ?

Electronics Forum | Wed Aug 20 12:49:12 EDT 2008 | charliedci

We have been running a 2060 for 2 years, along with other older juki/zevatech placement systems. We have also had positve results. Fell free to contact me via e-mail for more specific info. charliem@dciincorporated.com

Component Database and Placement List

Electronics Forum | Mon Oct 23 06:50:06 EDT 2017 | spoiltforchoice

For package shapes/names I would recommend using manufacturer names. This is much safer than coming up with descriptive names like QFN32_5x5 as there are multiple 5mm 32Pin QFN shapes even when pitch is the same, this makes it safer to use a name in

ICT and specifying PCBA testing

Electronics Forum | Fri Mar 26 11:31:34 EDT 2010 | rway

I have been using ICT for a number of years. It is still a viable resource for catching defects in the production process. AOI doesn't catch everything, such as bridging on QFN or J-lead devices (this will depend on the type of AOI and camera syste

Via holes and Wave Solder

Electronics Forum | Mon Mar 13 15:35:56 EST 2006 | russ

You're a piece of work! Why don't you work for any of the major wave companies? So how does slowing the conveyor speed eliminate drying flux? And when you slow it down, what speeds it up to make you say "I lower the wave because I get shorts going

ICT and specifying PCBA testing

Electronics Forum | Mon Mar 29 12:10:14 EDT 2010 | rway

Test Jet will work for catching lifted leads, certainly. X-ray is the only thing for testing for internal solder defects such as voids and cracks. I personally do not have any experience using X-ray, so I cannot advise on its reliability. Perhaps

Via holes and Wave Solder

Electronics Forum | Mon Mar 13 14:26:45 EST 2006 | Wave Master Larry

Well, im not sure what plane you guys are on, but I can back up my what im talking about. Ya see I wnet to Soltec traingin back in 1995 for our new wave. I got a diploma proofing that I know what i'm talking about. no one else in my company has on

Water wash flux and cleaning

Electronics Forum | Mon Jun 19 09:47:23 EDT 2017 | georgetruitt

You have a lot to think about! What does the flux manufacturer recommend as far as specifics like water temp or pressure? Do they recommend high temp di-water a detergent or saponifier? Do you currently have a cleaning machine, batch cleaner or inl

Re: BGA and Gold Boards

Electronics Forum | Thu Jun 25 09:53:04 EDT 1998 | Earl Moon

| | Has anyone had experience with placing BGA on gold plated boards. I thought I read a while ago there was a problem with embrittlment causing cracked joints. If anyone has experience with this your feedback would be great. | | Mike | Mike, | You

Decoupling caps and PCB layout

Electronics Forum | Wed Aug 10 02:38:36 EDT 2016 | zxcvb

I guess I've been somewhat ignorant when it comes to the finer details of pcb layout. Lately I've read a couple of books that try their best to lead me on the straight and narrow. Here is a couple of examples of a recent board of mine, and I have hig


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