Electronics Forum | Fri Mar 18 14:32:43 EST 2005 | pmd
Im not fimiluar with SIEMENS F5 but I believe that lead length devations translate to coplnary devations. As a lead gets bent inward or outward the coplnary changes. I dont know what the ratio is but you may be able to set tolorances for lead length
Electronics Forum | Thu Apr 14 11:38:29 EDT 2005 | mmjm_1099
Play around and setup the coplanarity in Fuji Flexa and see if this can help you at all. Other than that I wouldn't have a clue as to what it might be.
Electronics Forum | Mon May 16 10:43:22 EDT 2005 | wizy
I would like to ask, if somebody know, what I have to do with "L3 TIME UP" error message in MPA-V, or where can I switch off the coplanarity unit?
Electronics Forum | Mon May 16 15:53:17 EDT 2005 | adrian_nishimoto
This has been a problem with new components coming directly from vacuum sealed desiccant packed moisture barrier bags with moisture level cards. We have also baked all boards prior to the BGA rework to ensure no moisture issues were addressed.
Electronics Forum | Tue May 17 10:01:42 EDT 2005 | russ
I have had the same problem with this supplier, we found that one mfg. place or process used a .015" piece of FR4 as the base while others had .030" Fr4, We discontinued use of the .015" and never had a problem again.
Electronics Forum | Fri Jul 22 09:23:13 EDT 2005 | alandra516
There is a company in Austin Tx called Process Sciences that can do that service for you. They can be reached at 512-259-7070
Electronics Forum | Tue Nov 01 19:56:41 EST 2005 | KEN
GS what was a typical coplanarity spec. on CCGA? I have one particula device that is 8 mil!
Electronics Forum | Wed Mar 15 09:01:11 EST 2006 | Vick
The lead was inspected for coplanarity and it's within the specification it's designed for and doesn't show any variation in terms of height as compared to it's adjacent lead that has good wetting
Electronics Forum | Wed Mar 15 11:27:05 EST 2006 | stepheniii
By any chance is it eutectic paste and pallidium leads? Also how tight are you checking coplanarity? At least with the MPA-G3 you can check so tight that any IC will fail in the real world. Or you can check so loose that you might as well not check.
Electronics Forum | Wed Oct 11 20:52:51 EDT 2006 | psgill
Guys, Any of you tried running different setting on the top & bottom side temperature on the reflow oven. I'm trying to address uBGA coplanarity issue using this method. Assume board are flat. Any inputs?
