Attenuation of high Frequency Signals in Structured Metallization on Glass: Comparing Different Metallization Techniques with 24 GHz, 77 GHz and 100 GHz Structures

A number of glass substrates made from the SCHOTT glass AF32_eco in a thickness of 0.1mm are metallized with different processes. On the metallized glass substrates, microstrip lines as well as ring resonator structures are realized which are optimized for frequencies of 24 GHz, 77 GHz and 100 GHz. A careful analysis of the S-parameters of these structures allows to extract the influence of the metallization on the attenuation of microstrip lines as well as quality factors of the resonating structures. The particular metallization process plays a crucial role for the GHz performance and the 'best-of' metallization performs comparable with corresponding structures realized on Rogers RO3003 substrates.