Electronics Forum | Wed Feb 15 04:25:56 EST 2006 | der
one of the guys was baking a 672BGA . he mistakenly left the oven on over night so instead of baking for 12 hours at 125 degrees C, they got baked for 24 hours. Is there any detrimental impact on the BGAs or are they just well baked???
Electronics Forum | Tue Mar 21 02:15:26 EST 2006 | pavel_murtishev
Good morning Dave, Here are some of my assumptions. Please correct me if I am wrong. 1. Mask opening. Due to mask to PCB misregistration mask is not always centered relative to pad center how is should be. Sometimes edge of the mask matches with ed
Electronics Forum | Mon Jan 08 10:41:50 EST 2007 | jaime39
If you bake the boards at 125 degrees celcius for about 4 hours it should work. I would also suggest that you talk to the PCB supplier to take care of this baking for you. NOTE: PCB�s with an Entek or any other type of OSP finish should not be baked.
Electronics Forum | Wed Feb 07 18:40:39 EST 2007 | bill
What is an acceptable mismatch for smt components and pcb. We are having cracked solder joints from fatigue after repeated thermal cycling 25 deg. c to 125 deg.c.
Electronics Forum | Mon Mar 26 17:02:55 EDT 2007 | muse95
That's what I thought. The humidity req't would be a non-issue when you are able to bake at 125C. Can you share details on how you bake at 70C?
Electronics Forum | Tue Aug 28 15:16:06 EDT 2007 | rgduval
Sorry...make that .750 long wires, with .125 strips. My mechanical mind was working, but the fingers couldn't translate correctly.
Electronics Forum | Tue Jun 17 20:59:07 EDT 2008 | fowlerchang
And we have evaluated this process before 2001. And it is widely used in our company world wide. And we don't control the rate of the drop in pressure, because it is same as 125 degree at normal pressure condition.
Electronics Forum | Tue Jun 24 21:01:27 EDT 2008 | fowlerchang
Qulification the baking process of 70 degree and 24 hours below 10Pa. We have the experiment data which shows the weight of baked water from package with this condition is more than 125 degree at normal condition.
Electronics Forum | Wed Jun 25 08:06:04 EDT 2008 | davef
Questions are: * What does "weight of baked water from package with this condition [70 degree and 24 hours below 10Pa] is more than 125 degree at normal condition" mean? * What is "normal condition"?
Electronics Forum | Fri Feb 01 05:40:17 EST 2008 | aj
we have also seen this issue but seems to be on boards whee there is a open space and no copper hatching. We bake these boards out for 4-6 hrs @ 125oC. aj...
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