Electronics Forum | Mon Nov 20 04:04:42 EST 2000 | Gyver
Sirs, Please do me a favor to answer the following questions, thanks a million! 1. Will the baking of BGA or PCB cause more oxidation before the SMT process? 2. What is the acceptable Life Time of solderability at customer site? The time that the sol
Electronics Forum | Fri Apr 20 07:30:14 EDT 2001 | wbu
In short: the measured deviation / the length this deviation occurs * 100% = % of deviation Actually we encounter mostly "twist" so we put the board on a flat surface, hold it down at the corners to see if any of the corners lifts, measure the heig
Electronics Forum | Mon Apr 23 14:03:18 EDT 2001 | Ryan Jennens
Dougie- We,too, have the IPC-A-600F, and the spec. refers to IPC-TM-650 test method in the back of the book. Look on page Number 2.4.22 of the test methods appendix. This outlines the procedure for determining the percentage of bow and twist,
Electronics Forum | Fri Mar 26 19:32:05 EST 1999 | Martin Dunning
I am a student doing a project on rework os BGAS and CSPS and Im looking for information on it especially rework of csps Has anyone got x-ray images of csps after rework or of BGAS to show csps with solder balls Appreciate any help Urgent!!!!
Electronics Forum | Tue Mar 21 20:30:48 EST 2000 | Dave F
Marc: Experimental evidence is rare. Published reports are rarer. I can�t comment on the impact of rework on your RF boards. I can tell you that: � HF is pretty LF these days. � We allow three rework actions on each aboard. � IPC-7721 is a fine s
Electronics Forum | Sat Dec 24 07:48:52 EST 2005 | ams_gen
Hello, I need to rework a thru hole DIP mounted on a metal backed FR4. It is difficult to remove the FR4 board from the metal back since it is riveted. Is there a simpler way to takle this? Thnx
Electronics Forum | Tue Sep 28 07:46:30 EDT 1999 | g cronin
if anyone has used or has one of these bga rework stations please give me your opinion on them. I am planning on using the sytem for not only rework but also low volume prototype production for hand built 1 or 2 qty pcb's, so ease of use is importa
Electronics Forum | Wed Jan 17 09:32:09 EST 2007 | Jeff
Hi, I am having problems reworking a lead free PBGA (23mm x 23mm, 1mm pitch). The board is relatively small (5" X 4" X 0.063"). During the removal stage, a thermocouple was placed at the solder ball level (between the board and underneath of compo
Electronics Forum | Thu Oct 17 05:16:44 EDT 2013 | vincentdesilva2003
Anyone can help me how many percentage of blowholes and pinholes if i do the followings: 1. Increase copper plating thickness more than 25 microns. 2. Pre Baking of PCB to remove gassing by drying out the PCB's
Electronics Forum | Wed Feb 03 18:32:07 EST 1999 | Earl Moon
| I'd like to find some technical papers on the reliability of reworked BGAs. If you know of any, please let me know. | | I have a concern about this because our current rework process does not apply solder paste to the pads prior to placing the pa
