This paper describes new type of MEMS spiral inductor using benzocyclobutene (BCB) for wireless applications. BCB consists of several attractive features for on-chip RF inductors, i.e., high resistivity, low dielectric constant and lower curing temperature. The fabricated inductor coils had 2.5 turns with 20μm for width, 20μm for pitch and the thickness of 2μm. The inductor coils are suspended about 12μm from the bottom BCB substrate. Our measured quality factor was 19 at 3.1GHz frequency. The measured inductance was approximately 3nH and it remained constant up to 10 GHz. The self resonant frequency (SRF) was at 13.6GHz.
Mobile technologies have relied on RF switches for a long time. Though the basic function of the switch has remained the same, the way they have been made has changed in the recent past. In the past few years work has been done to use MEMS technologies in designing and fabricating an RF switch that would in many ways replace the electronic and mechanical switches that have been used for so long. The work that is described here is an attempt to design and fabricate an RF MEMS switch that can handle higher RF power and have CMOS compatible operating voltages.