Electronics Forum: seeing (Page 6 of 705)

QFP on going on square (now and again)

Electronics Forum | Wed Apr 03 04:54:46 EDT 2013 | ericrr

Thank you for that, I see the #106 nozzle looks in better shape (with the rubber) I might try that nozzle and see how it goes on a few boards, then I could let the "higher authority" know.

electrovert Omniflow 10

Electronics Forum | Tue May 07 12:27:23 EDT 2013 | hegemon

Seems really excessive. I am not familiar with that particular oven, but I would check to see that the fans are not seeing excess heat during use. Is there any ducting around the fans that might have leaky joints? Is there insulation around the fan

PIHR... what do you think...?

Electronics Forum | Sun Nov 09 11:44:57 EST 2014 | robertwillis

Just thought it may be helpful, my FREE 100 page ebook on Pin In Hole Intrusive reflow is available to download see http://pihrtechnology.com/ Also my book on Package on Package may also be useful for the future see http://www.packageonpackagebook.c

Halogen-free Solder Re-flow Quality Issues

Electronics Forum | Thu Oct 01 12:46:57 EDT 2015 | gregoryyork

Would be nice to see your profile, as I would imagine you could be too cool in reflow especially if seeing milky residues in Paste could be Organics that havent volatised out properly

Samsung SM421

Electronics Forum | Thu Dec 01 08:03:38 EST 2016 | schmidtv62

Thanks for the info. Have you had any experience with multi-pitch BGAS. We are starting to see more BGAs with non-standard ball pitch. See attached.

Crystal on a PCB brakes under vibration

Electronics Forum | Thu Nov 29 15:42:30 EST 2018 | emeto

Thanks Rob, in my case I will probably have it in the middle under the part and see if it really helps with the vibration. My other option is to use underfill and see how that works...just not sure how good it will flow under as the part is close to

Re: Where's Earl Moon ?

Electronics Forum | Wed May 17 14:01:46 EDT 2000 | Earl Moon

Steve, Great to see from you again, as so very many times before? New folks always welcome on the forum. You and Dave are management's big hope for success to attract more advertising. Can't wait to see what you have to ask Mr. Harper, if that happe

I see the problem

Electronics Forum | Tue Mar 09 14:04:13 EST 1999 | Clifford Peaslee

Dave, I see that messages in that thread show indications of other messages which are not currently there. The only reason I see for this happening is that the thread did not convert properly into the new forum last August. We do have backups that I

No Clean Selective Solder

Electronics Forum | Thu Aug 01 07:36:03 EDT 2002 | pjc

Chris, OK, sounds like it may be more of an equipment problem: "The solder balls are randomly deposited along the path of the select wave,..." Does the equipment vendor have an applications engineering group to assist you? If not or are weak, try to

8 MIL VIAS OPENING DURING THE ASSEMBLY PROCESS

Electronics Forum | Fri Dec 13 12:10:36 EST 2002 | STEPHEN WALTERS

WE ARE EXPERENCING OPEN 8 MILL VIAS UNDER THE BGA'S, THEY ARE OPENING AFTER THE ASSEMBLY PROCESS, THEY ARE FROM MULTIPLE PCB VENDORS, THEY PASS AT THE PCB SUPPLIERS TESTING, AND WE HAVE FOUND THAT THEY HAVE HAD 2 MAJOR CAUSES 1. BUBBLE INTRAPMENT, 2.


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