Electromagnetic analysis of conductor track surface roughnesses from 1 GHz to 110 GHz

Author

Talai, Armin ; Steinhausser, F. ; Gmeiner, B. ; Wegener, Martin ; Bittner, Achim ; Deisinger, U. ; Schmid, Ulrich ; Roosen, A. ; Weigel, Robert ; Koelpin, Alexander

Author_Institution

Inst. for Electron. Eng., Friedrich-Alexander-Univ. Erlangen-Nuremberg, Erlangen, Germany

fYear

2014

fDate

3-8 Aug. 2014

Firstpage

415

Lastpage

418

Abstract

Conductor tracks comprise a frequency dependent attenuation of electromagnetic waves, since with increasing frequency the current flow is displaced to the near surface region due to the skin effect. Therefore, the effective length of the conductor is increased by the surface roughness, while its effective cross-section is decreased by current displacement, both leading to higher metallization loss. In this paper, surface topographies of typical conductor materials were recorded by confocal microscopy and rebuilt as 3D CAD models. Subsequent electromagnetic simulations reveal the influence due to roughness on high frequency characteristics for physical vapor deposited, thick film and photochemically etched microstrips.

Keywords

CAD; optical microscopy; skin effect; surface roughness; thin films; 3D CAD models; conductor track surface roughness; current displacement; current flow frequency; effective cross-section; electromagnetic analysis; electromagnetic waves; frequency 1 GHz to 110 GHz; frequency dependent attenuation; metallization loss; photochemically etched microstrips; physical vapor deposited film; skin effect; surface topographies; thick film; Design automation; Gold; Materials; Metallization; Rough surfaces; Solid modeling; Surface roughness;

fLanguage

English

Publisher

ieee

Conference_Titel

Electromagnetics in Advanced Applications (ICEAA), 2014 International Conference on

Conference_Location

Palm Beach

Print_ISBN

978-1-4799-7325-5

Type

conf

DOI

10.1109/ICEAA.2014.6903887

Filename

6903887