Electronics Forum | Wed Dec 21 21:24:59 EST 2005 | davef
Primary differences between Matte Tin plating and Bright Tin plating are: * Temperature compatibility ** Matte Tin is compatible with the elevated temperatures of lead-free, reflow processing (250-260C). ** Bright Tin has a tendency to discolor (turn
Electronics Forum | Wed Jan 11 10:12:23 EST 2006 | ratsalad
I've used an old version (maybe 7 or 8 years old) of GC-Place to convert gerber to centroid data. It is semi-automatic. If I remember correctly we'd start by selecting the pads for the largest components first. The software would find matching gro
Electronics Forum | Sat Jan 14 06:38:04 EST 2006 | DannyJ
Hi Ken, Good question, and I did search for what you are asking, but unable to find anything conclusive about using tacky flux vs. solder. In reliability, it depends on which section of the process you are talking about. Mainly (and there are sev
Electronics Forum | Wed Feb 15 08:02:04 EST 2006 | davef
Se�or Tech Search the fine SMTnet Archives. For instance: http://www.smtnet.com/forums/Index.cfm?CFApp=1&Message_ID=25210 Roger Saunders, President, Saunders Technology summarized the pros and cons of taping thermocouples as [He's taking about Ka
Electronics Forum | Tue Mar 07 10:46:24 EST 2006 | muse95
I have to disagree with you, BillyD. If Craig searches the forum, he will see that the concept of a Pbfree BGA with SnPb paste has been debated many times. You say it is fine. I say it is NOT. There have been several studies done that clearly sho
Electronics Forum | Tue Mar 14 13:42:45 EST 2006 | patrickbruneel
If the OSP boards have gone through double reflow I assume that you use an aggressive (halide) flux for wave soldering. SAC 305 is known (search the archives) to dissolve copper faster than other lead-free alloys. This together with an aggressive flu
Electronics Forum | Mon Mar 13 08:03:57 EST 2006 | paulinct
Hi Everyone, I searched and found some old comments about the Novastar machines. I was wondering if anyone has purchased a newer one and used it for Lead Free? If so what do you think? We currently run 2 Technical Device machines (leaded) and hav
Electronics Forum | Tue Apr 25 10:13:17 EDT 2006 | slthomas
What kind of parts are on the bottom? Small passives are very unlikely (won't unless other abnormal factors come into play) to fall off when reflowed a second time regardless of temperature differential. There is a simple weight/soldered surface ar
Electronics Forum | Fri Apr 28 15:54:58 EDT 2006 | dismon
Hi, I've been searching for comments about this, and found something, but a little old, so here is my question: I'm going to purchase a new P&P machine and have two options: Juki 2060 and Mydata MY9. What I need is: easy to manage, easy to change
Electronics Forum | Tue May 02 07:46:39 EDT 2006 | Bob R.
Be careful about taking any generic advice and trying to use it to reduce voiding for your particular paste with your particular boards. I've done a few literature searches over the years on causes/cures for BGA voiding in the SnPb world and found a