Electronics Forum | Wed Apr 09 15:05:11 EDT 2003 | davef
This just makes my head hurt. Why do these 22 BGA with hundreds of solder connections each have "open circuit due to the lack of solder paste"? Something just doesn't sound Kosher. Tell us about: * Stencil design * Solder paste * Board design in t
Electronics Forum | Tue Oct 14 09:13:14 EDT 2003 | davef
To us, time above liquidous plus 20*C is more important than the 60 sec [er what ever] above 183*C [which we think is meaningless] that the fine solder paste supplier suggest. Based on what you've told us and lacking any failure analysis, we'd gue
Electronics Forum | Tue Aug 17 11:28:07 EDT 2004 | rlackey
Hi, I'm not the expert DaveF is, however I have seen quite a few cracked chip capaictors in my time - most of these were from lack of Z height adjustment on a turret chipshooter to compensate for various thickness. Do you have separate 1206 thick
Electronics Forum | Fri Mar 04 07:19:19 EST 2005 | sureguo
I guess it would be the work related reaction as there is many hazardous substance in the SMT process, such heavey metal, flame retardant, which are known for its hazard to enviroment and human health. actually, in our factory, maybe because of lack
Electronics Forum | Thu Jun 02 11:39:15 EDT 2005 | Rob
China's a big place with a wide spectrum of companies (just like the US & Europe), some very professional, some ok, and some not so good. Where ever you get fast expansion you will get a high number in the last catagory - whether through lack of e
Electronics Forum | Thu Oct 13 14:14:10 EDT 2005 | rcanten
It depends on the type of connector but if you have a connector that has projections on the ends that look similar to leads in the lighting you will be hard pressed to get this to place with anything other than a vision number 6 on a IP2 and then the
Electronics Forum | Tue Oct 25 07:53:17 EDT 2005 | trd
Ken, Some of us out here work with machines that cost $20,000 and not $200,000. Also some of us work for companies that dont spend their profits into upgrading equipment but maintaining what it has.....lacking or not.....so....because of those reason
Electronics Forum | Fri Nov 25 12:12:46 EST 2005 | pjc
To state whether an oven can or cannot "do lead free" very much depends on what type of product you need to solder. High thermal mass products are problems for 4 and 5 zones ovens becauase they typically cannot follow the solderpaste mfrs. profile, u
Electronics Forum | Thu Dec 08 13:17:31 EST 2005 | Amol Kane
during my researches for LF transition, a question being asked is -- why even consider immersion tin if it whiskers. does it really matter?, because during reflow, the Sn dissolves in the SAC solder alloy and does not exist in a "Sn whisker" formabl
Electronics Forum | Thu Feb 23 17:45:18 EST 2006 | Robert Joosten - PrintTec
Before doing anything; contact http://www.ape.com and ask for Casey Schue; he will tell you and show you the real bga rework equipment; the other brands just lack the power to do the job properly; I've seen too many people already buying inefficient
