101SHT100CS6LE datasheet(20/34 Pages) EXXELIA

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CERAMIC CAPACITORS

136

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Taping : dimensions

Page revised 06/20

III.8. DUT: AT9402

This sample has a paramagnetic behavior with a relatively low magnetic susceptibility

Xg around 10–7 uem.CGS/g.

III.9. DUT: AT9410

This sample has a paramagnetic behavior with a relatively low magnetic susceptibility

Xg around 10–7 uem.CGS/g.

IV. ANALYSIS

IV.1. Inﬂuence Of Leads

From the above chart, the following points may be deduced:

The copper termination slightly increases the magnetic susceptibility of the chip

but the total value remains very low and the paramagnetic behavior is suitable for

non-magnetic applications;

As the ribbon shows strong paramagnetic behavior, the assembly made with the

capacitor and the leads has an even lower magnetic susceptibility than the chip

alone. This means that for a very strong requirement for non-magnetic criteria, the

assembly made of capacitor and leads is better than the capacitor itself;

In theory, it should be possible to decrease the magnetic susceptibility of the as-

sembly – capacitor and leads – still further to reach a nearly a nil value, by using

thicker or longer silver leads. These would also improve the heat transfer and there-

fore allow higher working power.

IV.2. INFLUENCE OF TERMINATIONS

IV.2.1. Copper Versus Nickel Terminations

From the above chart, the following points may be deduced:

We are comparing here a magnetic termination – nickel barrier one – and a

non-magnetic termination – copper barrier one. Naturally, the nickel termination

cannot be used for non-magnetic applications but it enables us to deﬁne a limit

above which a termination should not be classiﬁed as non-magnetic;

As we are using a logarithmic axis, the best magnetization value to consider for this

limit seems to be around 0.10 uem.CGS/g;

Both copper and silver-palladium terminations are below this theoretical limit of

0.10 uem.CGS/g and can therefore be considered as non-magnetic.

VI.2.2. Copper Versus Silver-Palladium Terminations

From the above chart, the following points may be deduced:

The copper or silver-palladium terminations slightly increase the magnetic suscep-

tibility of the chip but the total value remains very low and the paramagnetic behav-

ior is suitable for non-magnetic applications;

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