Electronics Forum | Sat Oct 06 08:42:21 EDT 2001 | davef
Please give us additional background on your board, solder, process, etc. If you are talking about black pad in ENIG solderability preservative, check the fine SMTnet archives to get started.
Electronics Forum | Tue Jan 04 08:02:54 EST 2005 | Mike
Hi!! Where can I get information about Post- and pre-reflow rework? Some links, opinions?? Please Tell me? I would like to know too some methods and cost effective ways,that how we can rework repair printed boards? Thanks!!
Electronics Forum | Wed Aug 31 12:33:25 EDT 2005 | Jaya
I have expirence running,double sided Imm gold boards recently which ed up a lot of solderability issue. The Imm gold need to be slightly more control during reflow oven area on it's profile.
Electronics Forum | Mon Dec 19 07:29:30 EST 2005 | jax
Tg is just a way to say when the board goes limp... or a quick way to rank laminates... who cares. For lead free you want to look at Td, Decomposition Temperatures. ( Temp at which the material weight changes by 5% )
Electronics Forum | Mon Dec 19 12:21:09 EST 2005 | Amol Kane
from what i know, Tg is important from thermal stresses point of view. board warpage increases greately when Tg is exceed
Electronics Forum | Fri Aug 24 12:39:59 EDT 2007 | hussman
I would say no, unless your machine is in extremeconditions. You may want to check your flux / preheat out as well. If you are leaving a lot of flux on the board at wave, it may be boiling - which can cause solder balls.
Electronics Forum | Wed Aug 27 13:08:30 EDT 2008 | vladig
Td - is the degradation temperature for a laminate (board), while Tg - is glass transition one. There is one more (even more important) - delta Tg. They characterize the quality of the laminate material. Regards, Vlad www.sentec.ca
Electronics Forum | Tue Oct 13 16:11:44 EDT 2009 | mikesewell
Not sure how many inspections need to be done at 15 - 20sec total per board, but you may need to install multiple SPIs/AOIs to hit your takt time. Mike
Electronics Forum | Fri May 21 17:36:39 EDT 2010 | m79d
Hi Fujispares thanks for the info but still not going. Tried other ic parts and the result is the same. Also tried another vision board. Any more suggestions? Thanks
Electronics Forum | Tue Sep 13 02:31:50 EDT 2016 | bukas
board input sensor sensitivity? maybe conveyor movement triggers it and because of that it sends pulse. conveyor moves few millimeters, how does machine act?
