Electronics Forum | Thu Sep 02 06:22:34 EDT 2010 | sachu_70
Good. This is the right way to profile. Let me ask you, have you anytime soldered QFN componets on your boards? The concept of LGA soldering is similar to that used for a QFN package. QFN soldering also exhibits void formations, and is an inherent pr
Electronics Forum | Thu Sep 02 12:27:27 EDT 2010 | frankmurch
Voiding is tricky, but some pastes have flux residue that can escape others don’t. It is normally called out. So I would change pastes. If you do not want to do that, try a slightly longer time above eutectic (give the flux a little more time to get
Electronics Forum | Fri Sep 03 10:52:39 EDT 2010 | arjan
Mark, Can you send some X-ray foto's of your LGA solderjoints, I am curious about the results of a marginal paste volume in combination with the Multicore LF318. Did you follow the recommandation of LT and use also soldermask defined pads on your bo
Electronics Forum | Thu Sep 09 05:23:10 EDT 2010 | 15009
You can reduce and almost eliminate voids and other paste related defects in LGA's BGA's, QFN's etc, by using solid solder deposit. Its been around for 24 years, 13 in the US. It is now included in the new IPC 7093 specification for bottom terminat
Electronics Forum | Mon Aug 30 08:08:30 EDT 2010 | sreid
Hello, I have been tasked with finding a solution to rework 242 boards that have 34 incorrect 0603 resistors placed. These resistors are placed throughout the board and are surrounded by other SMT components. If anyone can advise me on a more time
Electronics Forum | Mon Aug 30 08:57:54 EDT 2010 | stevezeva
Hi Stephen, Once they've been soldered down, you're stuck with doing touch labor on each and every one. But you might be suprised how quickly this can be done with the right tools. Are they all the same value resistor? If so, that should make things
Electronics Forum | Tue Aug 31 09:58:33 EDT 2010 | cardinal
Hello, I am looking for someone who can do complete installatin and training on a 2005 vintage SPEA 4040 flying probe system. We are willing to pay top dollar for this service; please contact me if you have interest in this job. Future opportuni
Electronics Forum | Thu Sep 02 19:22:08 EDT 2010 | fulldrawmike
seen it on a uni-mod many times. there is a muffler near that assy that if dirty will cause the air dump to back up and not exit out the muffler. if yours has one, remove it and see if it stops the table latch. it will be loud but it will let you k
Electronics Forum | Tue Sep 14 00:22:08 EDT 2010 | sachu_70
Hi Gani, non-wettting issues can surely be resolved. At first, would appreciate if the following info could be shared. Do you supply just one PCBA product to this client or is the complaint towards one of the many products that you deliver? Also, doe
Electronics Forum | Sat Sep 18 06:23:39 EDT 2010 | bandu_shende
We are d2h pcb manufactures. We are having using ST BGA Ics un our pcbs. Can u please confirm how many will be the standard BGA rejection including parts,process etc.For example there must be 1 defect in thousand of two defects in thousand.What is th
