Copper Surface Roughness Analysis in Mathematical Morphology Algorithm for the Insertion-Loss Validation

Insertion loss of a testing vehicle is widely referred for the material estimation, the differential pair and single-end striplines are generally employed for the high-speed digital applications. In addition to the matte side, the shiny side with the surface treatment of the inner layer is the criti...

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Bibliographic Details
Main Authors: Chang, Li-Chi, Yang, Yu-Sen, Lee, Yu-Tian, Hsu, Shao-Wei, Lee, Chieh-Sen, Chang, Ming-Chuan
Format: Conference Proceeding
Language:English
Subjects:
and insertion loss
cross-section
Differential
Insertion loss
Loss measurement
mathematical morphology
Morphology
single-end
Stripline
Surface roughness
Three-dimensional displays
Transmission line measurements
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Summary:Insertion loss of a testing vehicle is widely referred for the material estimation, the differential pair and single-end striplines are generally employed for the high-speed digital applications. In addition to the matte side, the shiny side with the surface treatment of the inner layer is the critical issue for the insertion-loss improvement. In general, the inner-layer roughness is determined by the cross-section scanning electron or optical microscope photo with the manual defining of the average line. Therefore, the tolerance is produced from personal operation or gage repeatability and reproducibility (Gage R and R). In this study, a mathematical morphology algorithm is proposed for automatically detecting the roughness of the striplines. Basing on the algorithm and operating flow, the detected Rz and Rq values of the copper-foil roughness are applied in 3D simulation tool for the insertion-loss validation and comparison.
ISSN:2150-5942
DOI:10.1109/IMPACT56280.2022.9966669