MUMBAI, India, Sept. 12 -- Intellectual Property India has published a patent application (202441017443 A) filed by Bharat Electronics Limited; and Indian Institute Of Science, Bangalore, Karnataka, on March 11, 2024, for 'fabrication of barium strontium titanate tunable capacitor device.'
Inventor(s) include Garima Kaura; Basanta Kumar Roul; Dillibabu E; S. B. Krupanidhi; and Sujit Das.
The application for the patent was published on Sept. 12, under issue no. 37/2025.
According to the abstract released by the Intellectual Property India: "The present disclosure relates to development of ultra-high tunable capacitors utilizing barium strontium titanate (Ba0.8Sr0.2TiO3) with film thickness of 180 nm as the ferroelectric material, sandwiched with SrRuO3 serving as top and bottom metallic electrode on a (001)-oriented SrTiO3 substrate. We have achieved a remarkable maximum tunability of ~91% through precise modulation of the 20% Sr concentration of Ba1-xSrxTiO3 and optimization to minimize dielectric loss. These multilayered capacitors demonstrate a substantial breakdown electric field value of 800 kV/cm and thermal stability for tunability across a range of temperatures and frequencies without compromising with the quality of device, making it a potential applicant for industrial use."
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