Electronics Forum | Fri Jun 18 06:54:43 EDT 1999 | Paul McMichael
A user of one of our components exceeded the floor life of some plastic BGA components. They did do a pre-bake prior to SMT reflow but only 72 hrs at 40C and not the recommended 12 hours at 125C. I've recommended accoustic microscopy to look for popc
Electronics Forum | Fri Jun 18 13:30:01 EDT 1999 | John Thorup
| A user of one of our components exceeded the floor life of some plastic BGA components. They did do a pre-bake prior to SMT reflow but only 72 hrs at 40C and not the recommended 12 hours at 125C. I've recommended accoustic microscopy to look for po
Electronics Forum | Fri Jun 18 10:59:37 EDT 1999 | Scott Cook
| A user of one of our components exceeded the floor life of some plastic BGA components. They did do a pre-bake prior to SMT reflow but only 72 hrs at 40C and not the recommended 12 hours at 125C. I've recommended accoustic microscopy to look for po
Electronics Forum | Fri Jun 18 12:11:20 EDT 1999 | John Thorup
| A user of one of our components exceeded the floor life of some plastic BGA components. They did do a pre-bake prior to SMT reflow but only 72 hrs at 40C and not the recommended 12 hours at 125C. I've recommended accoustic microscopy to look for po
Electronics Forum | Mon Sep 08 11:30:54 EDT 2003 | clarkk
A customer recently questioned our use of the EIA curves for derating SMT devices for increased ambient temperatures. The European method (CECC) is much more severe in derating power ratings of devices as temp increases, but there are differences in
Electronics Forum | Wed Sep 10 12:01:07 EDT 2003 | clarkk
A customer recently questioned our use of the EIA curves for derating SMT devices for increased ambient temperatures. The European method (CECC) is much more severe in derating power ratings of devices as temp increases, but there are differences in
Electronics Forum | Mon Oct 17 15:22:38 EDT 2005 | Mike W
I would only suggest this machine IF I were a Fuji salesman. The NXT will ALWAYS derate by over 40% for boards longer than 10"
Electronics Forum | Mon Oct 17 15:53:12 EDT 2005 | ricardof
mmh, good point, our current board is not that big, however, I'm wondering what is a common derate number on big boards?
Electronics Forum | Wed Aug 05 18:36:19 EDT 2015 | caurbach
John, I assume you mean 60%, not 65%. J-STD-033 has a derating table for floor life which accounts for conditions other than 30C/60% RH. Table 7-1 is what you're looking for I believe. Adam
Electronics Forum | Thu Dec 17 19:44:04 EST 1998 | Dave Kalen
| What is the CPH for Universal/Sanyo chip shooter? Spec. needed only. Thanks | Mike, just like the rates that Dave F said, the tact times of the newer Sanyo/UIC machines is .1 or 36000cph. Because of the Direct Drive head, we have little derate so
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