Work

RF Characterization of New Generations of Bio-Based PCB Substrates in Harsh Environment

Year: 2025

Type: conference-paper

Abstract: This paper presents the RF characterization of the complex permittivity of a novel biosourced PCB substrate, based on a PLA polymer matrix reinforced with a woven flax fiber fabric and laminated copper cladding, as a function of temperature and humidity. The measurements were performed using a cylindrical cavity and resonant transmission lines inside a climate-controlled chamber. Various copper removal techniques were investigated, including peeling, chemical etching, laser ablation, and mechanical milling. To analyze the observed trends on the measurement results, an effective medium model tailored for stratified materials was employed. A particular focus on substrate inhomogeneities has been also investigated for the explanation of the measurement discrepancies.

Source: European Microwave Conference (EuMC)

DOI: 10.23919/eumc65286.2025.11235279

Authors: F. Guidoum, V. Grennerat, P. Xavier, A. Ciszar, P.-O. Jeannin

Institutions: Institut polytechnique de Grenoble, Centre National de la Recherche Scientifique, Centre de Radiofréquences, Optique et Micro-nanoélectronique des Alpes, Université Savoie Mont Blanc, Laboratoire de Génie Électrique de Grenoble, Université Grenoble Alpes

Language: English

Topic: Microwave and Dielectric Measurement Techniques

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: green

OpenAlex ID: W4416367403

FWCI:

Cites: 7

Cited by:

Related to: 10