Solenoidal transformers for magnetic materials integration

This paper presents the design, fabrication and characterization of suspended solenoidal transformers fabricated using a low cost single step 3D copper electroplating process. The design and optimization of solenoidal transformers with and without magnetic core are performed using HFSS. After optimi...

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Bibliographic Details
Main Authors: Ourak, Lamine, Ghannam, A., Bourrier, D., Viallon, C., Parra, T.
Format: Conference Proceeding
Language:English
Subjects:
Above-IC
Coils
Copper
Inductance
magnetic core
Magnetic cores
Magnetic materials
Q factor
Radio frequency
solenoids
three-dimensional integrated circuits
transformers
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Summary:This paper presents the design, fabrication and characterization of suspended solenoidal transformers fabricated using a low cost single step 3D copper electroplating process. The design and optimization of solenoidal transformers with and without magnetic core are performed using HFSS. After optimization, the suspended structures reveal good electrical performance. The addition of a magnetic core to these structures shows a significant improvement of its electrical properties. Thus, an increase of 10% on G max , 20% on coupling coefficient k, 80% on the quality factor Q and 350% on the inductance is observed. Under probe measurements carried on the suspended structures without magnetic core exhibit a Gmax of -1.45 dB and a Q of 28.5 at 2.5 GHz. The enhanced performance coupled with the low cost 3D process makes these transformers excellent candidates for today's RF applications.
ISSN:2165-4727
2165-4743
DOI:10.1109/APMC.2012.6421757