Electronics Forum | Wed Mar 12 23:00:10 EDT 2008 | davef
You can say: The pad was lifted after reflow and prior to the dye and pry failure analysis. When we see lifted pads, we think: * That's a good solder connection * Either it took a lot of force to lift that pad or the fabrication of the board in the
Electronics Forum | Mon Apr 02 17:16:22 EDT 2001 | kward
Try IPC-7095. It is not free , but discusses in-depth Design and Assembly Process implementation for BGAs. Website is ipc.org
Electronics Forum | Tue Apr 27 12:32:53 EDT 1999 | Frank Hinojos
What is the current spec for sizing PCB pads for a land grid array? How about for a ball grid array? Are there industry spec's I can reference? Thanks, Frank
Electronics Forum | Wed Mar 20 15:18:09 EST 2002 | angiewest
You may want to check out IPC-SM-782 "Surface Mount Design and Land Pattern Standard" http://www.ipc.org Good Luck
Electronics Forum | Wed Jun 05 21:33:12 EDT 2002 | davef
Tough to say based on what you have told us. Things to Determine are: * Is the heat at the solder connections that are not reflowing properly adequate? * Is the pad surface of the solder connections that are not reflowing properly solderable?
Electronics Forum | Fri Apr 01 23:32:39 EST 2005 | ccgooi
Hi, I would like to understand more about dye and pry process for BGA assembly. Can anyone provide me more information about reference about this topic.Thanks.
Electronics Forum | Sat Apr 02 07:26:47 EST 2005 | davef
It's used for BGA 'disassembly'. Look here http://www.smtnet.com/forums/Index.cfm?CFApp=1&Message_ID=32271
Electronics Forum | Thu Jul 06 12:06:12 EDT 2006 | pavel
Rob, do you have any tip on reliable supplier of "really flat" flexible pcb? We tried several but all with issues. Thank you. Pavel
Electronics Forum | Fri Jul 07 04:18:48 EDT 2006 | Rob
Hi Pavel, We tried 6 or 7 but they all had issues with one part or another of their process. The only consistantly good ones we experienced were the Japanese manufacturers Nitto & Fujikura - these were more expensive than the other options, but pro
Electronics Forum | Sat Oct 06 05:33:47 EDT 2001 | spchua
I had recently encounter the "black and grey" pads problems for the BGA pad after the convection re-flow. The pads shows in in "black and grey" color and a litter solder in it, and it happen in ramdom, when applied heat and solder on the "black and g
.gif)
