Fully Screen-Printed Tunable Microwave Components Based on Optimized Barium Strontium Titanate Thick Films

The composite system Ba0.6Sr0.4TiO3–ZnO–B2O3 for thick film preparation has been modified via copper–fluorine codoping of BST to make it suitable for the fabrication of co‐fired metal‐insulator‐metal (MIM) components. Based on the resulting improvement of the thick films, MIM varactors and phase shi...

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Bibliographic Details
Published inInternational journal of applied ceramic technology Vol. 12; no. S1; pp. E96 - E105
Main Authors Kohler, Christian, Nikfalazar, Mohammad, Friederich, Andreas, Wiens, Alex, Sazegar, Mohsen, Jakoby, Rolf, Binder, Joachim R.
Format Journal Article
LanguageEnglish
Published Malden Blackwell Publishing Ltd 01.01.2015
Wiley Subscription Services, Inc
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Summary:The composite system Ba0.6Sr0.4TiO3–ZnO–B2O3 for thick film preparation has been modified via copper–fluorine codoping of BST to make it suitable for the fabrication of co‐fired metal‐insulator‐metal (MIM) components. Based on the resulting improvement of the thick films, MIM varactors and phase shifters were produced by subsequent screen‐printing of silver and BST pastes as well as co‐firing. Microstructural investigations showed the compatibility of silver and BST with neither chemical reaction nor cracking of the layers. The microwave characterization revealed good results regarding tunability and quality factor of the varactors and high figure of merit of 70°/dB at 1.72 GHz for the phase shifter.
Bibliography:Tunable Integrated Components in Microwave Technology and Optics (TICMO)
ArticleID:IJAC12276
German Research Foundation (DFG) Research Training Group - No. 1037
istex:E8328DD13A45ACFD9AF48E66807C2035EA14F341
ark:/67375/WNG-QTVQRNDR-C
ISSN:1546-542X
1744-7402
DOI:10.1111/ijac.12276