Electronics Forum | Fri Mar 26 10:35:52 EDT 2010 | grahamcooper22
Hi Krish, thanks for your detailed reply. Sorry I assumed you may be using a solder paste to solder the BGA to the pcb. Either solder paste or Gel flux is best for resoldering BGA to pcb. Are you using Gel flux ? Most popular long term storage for mo
Electronics Forum | Sat Mar 27 03:57:09 EDT 2010 | grahamcooper22
I agree with Steve. Your are too hot and too hot for too long. What is the device spec for Peak Package Temperature (PPT)? (this is usually on the moisture barrier bag) Many leaded BGAs have PPT of 225 Deg C. Even if it is higher, like Steve suggeste
Electronics Forum | Wed Mar 31 09:44:12 EDT 2010 | bandjwet
One thing I would suggest right off the top is to go to a paste printing process. This will get first pass yields higher (usually 10+% higher than gel flux). If you are suggesting that you have good collapse everywhere, the profile is adequate (soun
Electronics Forum | Fri Mar 26 21:36:03 EDT 2010 | cusackmusic
I posted this once, but it disappeared. Anyway, we have an Ersa Hotflow 5 that is our backup, but I doesn't power up anymore. I've called Ersa several times, and they don't return my calls. It powers up, and communicates with the PC, but the scree
Electronics Forum | Mon Mar 29 11:48:43 EDT 2010 | davef
SAC BGA In A Sn/Pb Reflow Process Conclusion: Area array components (ball grid arrays, chip scale packages, flip chip packages) with Pbfree solder sphere alloys should not be reflowed using a tin/lead reflow profile due to the resulting non-uniform s
Electronics Forum | Mon Mar 29 16:19:28 EDT 2010 | rodrigo
Hi All, I just realized that our CP-6 is reading only two of three fiducials. Is this normal? The coordinates are not the same and they're numbered 1,2,3. We use the MCS30. I checked the proper data and I couldn't see anything that would cause it to
Electronics Forum | Thu Jul 29 13:56:16 EDT 2010 | garciaga
Siemens recommended Special nozzle-03070148 and provided GF to place this component using Siemens s-25/27. It worked fine in the beginning but after a while we saw droppage. So we moved the set-up to F5 machine which is slower. Their recommended G
Electronics Forum | Wed Mar 31 06:08:45 EDT 2010 | miroyu
Hi everyone ! I started to program quad 4C for the first time and have some problems. First, board detection LED and proximity Led (on the front panel) are not lightning whatever I do! Second problem is I teach machine board size, nozzle locations
Electronics Forum | Tue Apr 06 14:45:52 EDT 2010 | stepheniii
You would be suprised what you can see with even a simple Xray machine. The engineers upstairs wanted to see if the xray could confirm there was an open via on a thin dense board with several layers. I thought (but didn't say) no way. But with carefu
Electronics Forum | Thu Apr 08 02:04:53 EDT 2010 | dilogic
Having no real experience with x-ray inspection, this answer helped a lot. What I actually want is to check top 3 layers and it should be pretty straightforward, as the second layer from the top should be almost empty and the third one should be a gr
