Electronics Forum | Wed Sep 21 01:51:32 EDT 2005 | hly
Cognex board is bad. Waiting to get a replacement. Thanks for offering to help
Electronics Forum | Wed Sep 21 02:05:34 EDT 2005 | hly
Thank you for your reply.
Electronics Forum | Tue Sep 20 17:39:52 EDT 2005 | russ
If the balls are eutectic (63/37) You shouldn't have any problems. All of our BGA rework is performed without paste. You have plenty of solder to make the joint with the balls themselves. Be wary of cleaning however since the standoff is less.
Electronics Forum | Wed Sep 21 01:57:40 EDT 2005 | hly
Hi K, Thanks for your reply. I was wondering if there is an industry spec that specifies a minimum required solder volume for BGA joints? Thanks HLY
Electronics Forum | Tue Sep 20 17:15:29 EDT 2005 | valuems
Hello I'll be the one to ask a dumb question--Why not fix the screen printer? If it is a MPM you can call me and I'll help if I can. And no I'm not trying to sell any thing. Better yet --why is the printer down? Wasn't thinking that you may be ou
Electronics Forum | Wed Sep 21 16:25:43 EDT 2005 | GS
IPC-7525 tells you how to make stencil apertures for BGA IPC-7095 tells you how much should be the paste volume in order to get a reliable BGA solder joint. How are your PCB finisced? (HASL, ENIG, OSP, etc?) In case of not HASL, it could be necessa
Electronics Forum | Tue Sep 20 17:09:14 EDT 2005 | hly
I have a situation with hot boards with fine pitch BGAs that I need to build. However, there is a big problem--the auto screen printer is down. I decided that we would use the stencil and manually line up the pads and do a manual print. I can't ac
Electronics Forum | Tue Sep 20 17:38:59 EDT 2005 | kmorris
HLY: If you must build product while you wait to get the printer fixed, and if the BGA balls are eutectic solder, your approach is a good one. All solder paste does in this assembly application is supply the flux. Additional solder volume is not ne
Electronics Forum | Tue Aug 31 09:27:08 EDT 1999 | Lee Anderson
Need info on ABW Relow Oven such as manuals, software or contact info technical support. Thanks!
Electronics Forum | Thu Feb 17 12:01:25 EST 2005 | Slow Ride
Or leave it stand alone. Granted, you may not be able to inspect 100%, but you can inspect before relow, after relow (if your AOI does solder joint inspection), inspect before wave and afterwards if needed. Now how did you justify a peice of equi
winsouce.jpg)
