Electronics Forum | Mon Jan 19 05:02:07 EST 2015 | gertjannus
I've some troubles with LGAs components. i try to create void free results. so far i have no problems with dpacks, i think i do something wrong with the vacuum time. The padcoverage of my lga is very bad the vacuum creates solderballs under the compo
Electronics Forum | Wed Mar 08 03:44:46 EST 2006 | lov3ly_9irl
Hi, Can anybody know a company that sell vacuum filter for Juki and Yamaha machines? Tks. Lauren
Electronics Forum | Fri Mar 10 03:30:44 EST 2006 | lov3ly_9irl
Thanks
Electronics Forum | Wed Mar 08 07:51:27 EST 2006 | sagan
Any SMC resseler may have the Venturi filter for the Juki... as for the Yamaha, i don't honestly know.
Electronics Forum | Wed Mar 08 16:52:07 EST 2006 | darby
Which model Yamhah are you talking about and what is the make and model # of the manifold block for the micro ejectors? If it has the Koganei ME05M series then your local rep can supply the filters. It is a good idea to get spare O-rings for the filt
Electronics Forum | Tue Nov 28 17:43:03 EST 2006 | IRAS
I'm looking to gain some knowledge on potential causes of solderballs on LGA's and advice on how to eliminate them. we all seeing some solderballs on only the edges of the LGA. Any inputs will be greatful.
Electronics Forum | Wed Jun 03 16:10:54 EDT 2009 | mattkehoe
Here is a little different spin on re-working/hand placing LGA's.. http://www.sipad.com/download/LGA%20Rework%20Document.pdf
Electronics Forum | Tue May 12 10:03:12 EDT 2009 | daan_terstegge
Hi All, I see more and more components like QFN or LGA with bottom-only terminations,with landpatterns getting finer all the time. I have no ppm-figures of our process, but based on a benchmark study by Agilent I'd say that 500 ppm is a decent value
Electronics Forum | Wed May 20 17:00:56 EDT 2009 | dyoungquist
We just placed a 56 pin QFN, 1 per board, on 10 boards and had zero defects. A good paste job, proper placement and a correct oven profile are the keys. If these are set up correctly, on larger runs your defects won't be zero but they should be le
Electronics Forum | Wed May 20 17:18:09 EDT 2009 | daxman
Just out of curiosity, how are you or anyone else determining a defect? Last I checked, IPC had no criteria yet for solder defects for QFN components. Has this changed? Biggest problems we see are voids which our x-ray shows a lot of. Our problems
