Electronics Forum | Fri Mar 21 09:49:33 EST 2003 | davef
Different vendor for: * Tants * BGA BGA correct?
Electronics Forum | Fri Mar 21 11:12:47 EST 2003 | dphilbrick
Change the vendor of what? The BGA, the Cap, the 0805?
Electronics Forum | Fri Mar 21 09:08:53 EST 2003 | mantis
Hi all, I have a strange problem,while building a large 15x15inch 3.5mm thick Pcb.During topside reflow i am experiencing some misaligned parts and even bridging on a bga that are sitting very close to a D size tantalum cap.The strange thing is that
Electronics Forum | Thu Mar 27 11:39:27 EST 2003 | kenlchin
Hi,mantis, I has experienced this case.when we run a model ,misalignment and tombstone of some 0805 resistors and 1206 caps always occured.we have taken many actions,such as adjusting reflow parameter&printing parameter,checking pcb and parts soldera
Electronics Forum | Fri Mar 21 10:28:27 EST 2003 | mantis
Sorry i didnt explain it vey well,the parts that are misaligned are always sitting next to these particular tanatlum capacitors.It affects 0805 parts and A tsop36 and can even cause a short on a bga right in the corner where the tant sits.If you chan
Electronics Forum | Fri Mar 21 11:25:07 EST 2003 | jonfox
His subject line is "Tantalum caps causing misaligned parts". Come on guys, I think he answered the question already. Is there any via/traces that connects the pads of the TANT to the 0805 and the BGA. Your two parts may be physically the same, bu
Electronics Forum | Fri Mar 21 13:55:54 EST 2003 | jseagle
Could the case material or thickness of the Tantulums be different? Have you contacted the manufacturers to find out? A lot of times there is data that doesn't appear on the datasheets. James
Electronics Forum | Thu Mar 27 05:09:48 EST 2003 | kcorrin
Is one vendors 0805 thicker than the other? If the height of the parts are different, this could be part of the reason for the shift on only one 0805. Good Luck! Kelly
Electronics Forum | Fri Mar 21 14:14:59 EST 2003 | mantis
I have contacted both vendors with this issue and the both said they have never heard of such a problem and that they could offer no type of explanitation.The leads are 90 sn/10pb and 98sn/2pb respectivley. The parts are all connected to the vcc and
Electronics Forum | Mon Mar 24 04:00:34 EST 2003 | emeto
Hi mantis, this effect you are talking about is very interesting.I guess there is a difference in technology of both vendors.It;s obvious.But we should find the reason. One question and one simple sudgestion:What excatly is your oven? And have you pa
