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From [log in to unmask] Sat Apr 27 15: |
15:29 1996 |
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Address,
Here at Hitachi Computer Products Division (Norman, OK) we introduce
bareboards to extreme environmental tests. These tests are
representative of 10 years of fault free life. However, these tests
are extremely long and cut into our overall product life cycle.
Without sacrificing bareboard quality, I am needing formula for time
to temperature ratio for Humidity testing.
i.e..
Our Humidity tests parameters are:
a. >=800hrs
b. 80?C (176?F)
c. 90%RH
d. R>10E9ohms @ 250VDC
e. test times are every 50 hrs until 250, then at 500 and 800
purpose: we are evaluating the absorption and diffusion of moisture
and moisture vapor. We are also checking metal migration, metal
through migration and metal surface migration (SIR).
Can anyone provide a time:temperature ratio for SIR testing?
i.e.. for every degree increased or RH, time can be increased or
decreased incrementally.
Please call or e:mail. Thank you.
Thomas John Gulley - PCB Project Engineer
email: [log in to unmask]
or
405-360-5500 x634
For several years I have been testing our customer bareboards
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