Electronics Forum | Wed Oct 30 15:20:30 EST 2002 | Dan
I am wondering what the general concensus is for handling PCB's. Do bare hands pose a problem for PCB assy's? Should operators who handle boards wear gloves? Thanks for your input.
Electronics Forum | Thu Oct 31 01:52:17 EST 2002 | jason
Anybody with experience on such a rework ?? The QFP has thermal pads underneath the body and needs to be re-connected when subjected for rework... Any ideas ???
Electronics Forum | Thu Oct 31 12:40:44 EST 2002 | cbarnett
I have a production line that is running ceramic substrate's. The line begins having tombstone's when the outside temperature begins to drop. I have moved our nitrogen tanks to the inside of the building and this done nothing. Does anyone have any id
Electronics Forum | Thu Oct 31 14:35:19 EST 2002 | russ
You may want to turn the nitrogen off altogether, in searching through the archives it has been stated and proven by many people that this could help a lot. I don't know why it appears to be outside temperature related. Could it be that the PPM le
Electronics Forum | Wed Nov 06 01:54:03 EST 2002 | jason
You may want to check your stencil aperture design too. The base ball pad design worked fine to solve my tombstone problem.
Electronics Forum | Thu Oct 31 15:37:58 EST 2002 | dphilbrick
Does anyone happen to have a .dwg of a BGA, any size BGA would do. If you have one and don't mind sharing it please zip it up and email to dphilbrick@qualcon1.com Thanks
Electronics Forum | Fri Nov 01 11:37:07 EST 2002 | Pete C
This is a technical forum. Equipment "needs" should be posted on the Equipment Mart- see in buttons on the left.
Electronics Forum | Fri Nov 01 12:02:50 EST 2002 | soupatech
OK, here is stupid question #..... oh, I lost track. While looking at a BOM I notice a lot of parts with "SMT" in the description. This is obviously Surface Mount. What do "SMB" and SMD" mean? I just know I will feel stupid when I read the answer.
Electronics Forum | Fri Nov 01 12:23:06 EST 2002 | russ
Tell us what the rest of the descriptions are. for example SMD can mean surface mount device or if they are decribing a tant cap it probably means "D" or 7343 package, I see diodes labeled as SMB, SMA, etc.. which also relates to size. So who knows?
Electronics Forum | Fri Nov 01 13:19:16 EST 2002 | soupatech
like this.... D13 Diode, Rctfr, SK12 1A, 20V Schottky "SMB" or F1 Pollyswitch, SMD300, 60V, 3A @20 celcius, "SMD"
