Benzocyclobutene as Substrate Material for Planar Millimeter-Wave Structures: Dielectric Characterization and Application

Abstract

The application of benzocyclobutene (BCB) polymer as dielectric substrate material for millimeter-wave microstrip structures is investigated in this paper to face the problem of large losses due to standard dielectrics in the high microwave range. Dielectric properties of BCB are characterized from S-parameter measurements on a conductorbacked coplanar waveguide (CBCPW) using the polymer as substrate material. Excellent features, with a low loss tangent and a stable dielectric constant, are demonstrated within the measurement range from 11 GHz to 65 GHz. As a validation of BCB high frequency performances, the design and experimental characterization of a V-band array on BCB substrate is presented. Measurement results on both matching and radiation characteristics of the millimeter-wave array are discussed.

Polymer–Ceramic Composites of 0–3 Connectivity for Circuits in Electronics: A Review

“…The feasibility of these composites for use in piezoelectric and pyroelectric applications, flexible sensors, transducers, thick film dielectrics, embedded capacitors, and other multilayer RF devices has been investigated 6–8 . The research was mainly focused on thermoset, thermoplastic polymers and elastomers like epoxy, 9–12 PVDF, 13 P(VDF‐TrFe), 14 silicon‐rubber, 15 polyimide, 16 PVC, 17 cyanoethylated cellulose polymer, 18 polydimethylsiloxane, 19 polystyrene, 20 benzocyclobutene, 21 polymethyl methocrylate, 22 metallocene cyclic olefin copolymers, 23,24 polyphenylene sulfide, 25,26 polyolefin elastomer (POE), 27 polypropelene, 28 and polyurethane 29 . The properties of the ceramic–polymer composites are determined by the number of phases and the way in which the phases are interconnected.…”

Benzocyclobutene Resins

“…The materials show excellent properties with a low loss tangent and a stable dielectric constant in the range of 11-65 GHz [23].…”

Materials containing benzocyclobutene units with low dielectric constant and good thermostability prepared from star‐shaped molecules

“…Over the past few decades, a series of BCB resins with low dielectric constant and high thermal stability have been designed. Costanzo et al . used benzocyclobutene as a substrate material for planar millimeter wave structures and measured a dielectric constant of 2.65 in the frequency range of 11 GHz to 65 GHz.…”