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Millimeter Wave Characterization of DuPont™ GreenTape™ 9K5 LTCC System in 40 to 110 GHz Frequency Range
Keywords: LTCC, Material Characterization, Microwave testing
Low Temperature Co-fired Ceramic (LTCC) material systems offer high reliability, low loss microwave/millimeter wave packaging solutions. DuPont™ GreenTape™ family of LTCC systems are widely used in microwave industry owing to their superior, consistent dielectric properties as well as improved process capability. DuPont™ introduced GreenTape™ 9K5 LTCC system during IMAPS National Conference held in Long Beach CA in October, 2011. This tape system is designed to work up to and beyond 100 GHz and has a dielectric constant of 5.80 and loss tangent of 0.0015 both measured at 10 GHz. RF/Microwave characterization data available at the time of introduction of GreenTape™ 9K5 covered up to 40 GHz. This paper extends microwave characterization of GreenTape™ 9K5 up to 110 GHz. Dielectric characterization at millimeter wave frequencies using bulk (un-metalized) and in-circuit (metalized) techniques are reported. A Fabry-Perot open resonator is used for bulk characterization while stripline and microstrip resonator components are used for in-circuit characterization of GreenTape™ 9K5. In addition, data from scattering parameter (S parameter) testing of generally used transmission lines such as microstrip, stripline, and co-planar waveguides (CPW) is also presented up to 110 GHz. Some of the critical technical considerations for millimeter wave characterization of materials will also be discussed.
Deepukumar Nair, Applications Development Manager
Research Triangle Park, NC

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