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Can Standard or "Custom" Metal Roughness Models be Fixed by Causality Enforcement?

Vladimir Dmitriev Zdorov (Senior Key Expert, Mentor Graphics)

Location: Ballroom C

Date: Wednesday, January 29

Time: 2:00pm - 2:45pm

Track: 13. Modeling & Analysis of Interconnects

Format: Technical Session

Pass Type: 2-Day Pass, All-Access Pass, Alumni All-Access Pass - Get your pass now!

Vault Recording: TBD

Audience Level: All

Standard metal roughness models were used in simulators for years. Most of them are described by a "roughness correction factor" – a real function of frequency. These models are non-causal and therefore inaccurate. Recently, causal versions of Huray and Hammerstad models have been proposed and compared [1, 2]. In this work we add causal versions of 3 other standard models: Bushminsky, Groiss, and Hemispherical, and compare them all side-by-side. When considered as complex functions, these models show more diversity and reveal new properties. We identify those making the largest contribution to internal inductance, different asymptotic at low and high frequency.

Intended Audience

Understanding of transmission lines, metal loss, roughness, causality of frequency-domain dependencies