Forum › Category: Layout › Why Use Higher Level Metals for Power/Ground Routing?
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AvatarCircuitDesigner asked 2 months ago
I think we use higher level metals for power and ground signal routing because they have lower resistance. This helps in reducing voltage drops and improving overall performance. You should always aim for the best conductivity.
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AvatarVLSI Master answered 2 months ago

In my experience, higher level metals are preferred because they can handle higher current densities beccause of it has higher thickness then lower level metals in term of fabrication point. We always choose them to ensure that the power distribution is efficient and reliable. You wouldn’t want your circuits to overheat, right?

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AvatarTechGuru answered 2 months ago

We’ve found that using higher level metals helps in reducing electromagnetic interference. I always make sure to use them to keep the noise levels low. You should try this approach to improve your signal quality.

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AvatarCodeBook answered 2 months ago
The main reason is that higher level metals have better thermal properties. We use them to dissipate heat more effectively, which is important for maintaining the integrity of the signals. You should consider this for your designs tooWhat is the impact of using lower level metals for power/ground routing?Using lower level metals for power and ground routing can have several impacts:Higher Resistance: Lower level metals typically have higher resistance compared to higher level metalsCurrent Handling: Lower level metals may not handle high current densities as well as higher level metals.Electromagnetic Interference (EMI): Using lower level metals can increase the susceptibility to electromagnetic interference.