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Reply To: | TechNet E-Mail Forum. |
Date: | Fri, 8 Mar 2002 08:39:56 -0500 |
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Hi Everyone,
It has been awhile for me. I have had so much work that I've had no time to take part in Technet. So please forgive me.
My Question :
1)What is the equivalent of a Thermal shock cycle?
2) How do I evaluate a failure if it fails with-in 80 cycles?
3) How do I break down a cycle so it would pretain to the part?
The cycle we have been told to use and evaluate our parts with is the following:
160 cycles
At -30°C ½ hr ® + 80°C ½ hr
If needed this is an assembled board.
As it is now I can only say it passed or it failed. I can not say how long the part will last, good or bad.
I have looked in IPC Test Method book TM-650 but could not find any thing.
Well if any one has any thing let me know. If not I thank each and every one of you for your time.
Have a good week end.
Nancy T.
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