Electronics Forum | Thu Oct 24 06:01:16 EDT 2002 | Kent
I'm currently dealing with an design of an end effector that need to pick n place a BGA dead bug package. The design is using peumatic system to do the task. Any advise or suggestion on this kind of design?
Electronics Forum | Wed Jun 09 02:35:10 EDT 2004 | Bernard
Base on the PORON foam rubber recommended, is it possible to apply on small BGA chip of 4x4 ball size 0.3mm. Any specific part no and supplier for this type of foam and is it a anti-static material? Would it be possible to punch out at dia. 3mm?
Electronics Forum | Tue Oct 29 05:22:38 EST 2002 | kent
Thankyou very much for the information. Another question, what are the difficulty of dealing with the larger ball and tighter pitch? What is size of the ball is consider large and how far the distance for pitch is consider tight? Currently I have
Electronics Forum | Wed Oct 30 09:43:01 EST 2002 | gregp
Larger tighter spaced balls will present a problem in sealing the vacuum cup. There will be more leakage in this case. It really depends upon the application. The BGA you mention should not be a major concern. The bigger problems are with bigger
Electronics Forum | Fri Jun 18 11:31:17 EDT 2004 | gregp
I think it depends on the thickness of the PORON sheet. For .3mm balls you could probably get away with a pretty thin sheet (maybe 1/16"). I don't know how thin it comes offhand. For the part you are describing I woulf try maybe a 3.5mm OD and a 1
Electronics Forum | Mon Oct 28 09:48:10 EST 2002 | gregp
If I understand correctly you want to pick BGAs from the ball side using some type of vacuum arrangement. You will find that the reliability of this is dependant on the size of the balls and the pitch. The larger the balls and tighter the pitch, th
Electronics Forum | Mon Oct 01 14:32:16 EDT 2001 | stefo
I know that it's probably a lot of work, but is there anyway to delete links that are dead in the library? I was searching for some papers and articles, and just about every link I clicked on was dead (page could not be found)...I got so frustrated
Electronics Forum | Thu Jun 08 17:10:22 EDT 2000 | pgarsoe
The link to the paper from the following page in your library: is dead. I have been unable to obtain any response from my attempts at registration, so in my frustration have decided that maybe you guys oughtta at least know about it. Regards, Steve
Electronics Forum | Wed Aug 17 08:36:15 EDT 2011 | rway
It's unlikely that this is the root cause. The battery may be dead, but the entire board is dead. This battery is most likely used for data retention for volatile memory as a battery backup.
