Electronics Forum | Fri Jul 20 17:09:10 EDT 2001 | davef
Circuits Assembly magazine 09/99 "Defluxing with Ultrasonics" by Les Hymes. [There's more but I can't find it right now. I'll add to this as I find the junk, er very nice stuff.] J-STD-001C states that its OK to use ultrasonics for cleaning so lon
Electronics Forum | Wed Nov 08 05:19:28 EST 2006 | amigo
It's not underfill is it? Sorry, but i don't know what is underfill, if you mean BGA, yes it is BGA !also sorry for very very late reply
Electronics Forum | Thu Nov 29 13:22:39 EST 2018 | roblackey
Hi Evtimov, For BGA's you place 4 on each side right outside the edge balls and it pulls the case down and a bit is pulled between the balls on reflow. Not tried gluing a crystal (they only gave me a strip to play with)
Electronics Forum | Thu Jun 01 21:14:21 EDT 2006 | roadhound
Hello, We repair mobile (cellular) phones, and most are now having their u-BGA IC's underfilled. Can anyone suggest methods for removal of the IC's ? The manufacturers are very vague when it comes to this process, but are starting to get tired of u
Electronics Forum | Thu Dec 15 04:26:20 EST 2005 | Rob
Hi Liza, We tend to see it on the larger plastic tape sizes & lower volume parts - such as smd connectors, fine pitch reeled IC's, BGA's etc. We don't tend to get it on high vol parts such as logic, 8 & 16bit micros, v-regs etc. Could this be du
Electronics Forum | Wed Jul 24 23:21:26 EDT 2002 | ppcbs
Being in the line of BGA rework and having performed much rework on boards that go into military planes, I can give you an opinion from a practical background rather than an in depth study. Basically BGA's have caused many of my customers big headac
Electronics Forum | Tue Oct 30 06:20:58 EDT 2007 | aj
Hi All, I would appreciate some advise with regard to Leadfree settings for a 5 zone reflow oven. I have a 35mm square BGA 672 pin on board. I am struggling to get the Delta T down to 2 degrees C . I have 5 Thermocuples drilled up from the bottom a
Electronics Forum | Fri Jun 05 19:20:25 EDT 1998 | Rin
| Our company is currently looking to implement a SMT production line. What I am looking for is feedback on people's experiences with various machines. | Here's what we are in the market for: | Low/Mid volume 3,000+cph machine that can handle high j
Electronics Forum | Wed Sep 12 18:11:03 EDT 2001 | davef
First, what on the area array package are you analyzing � * Package cracking? * Cracked solder balls? * Er, what? Second, most failure analysis discussions consider dye penetration to be a non-destructive test, but then again most failure analysis
Electronics Forum | Tue May 18 16:22:43 EDT 1999 | Earl Moon
| | | Hi Guys, | | | | | | I am going to be graced with the good luck of processing microBGA's in the near future. A bit of a step forward from printing 20-mil pitch and wave soldering 0805's, wouldn't you say? | | | | | | So, any of you folks who
