MUMBAI, India, July 24 -- Intellectual Property India has published a patent application (202511003227 A) filed by The Secretary, Ministry Of Electronics And Information; and The Director General, Centre For Materials For Electronics on January 14, 2025, for High Accuracy, Linear Response Relative Humidity Sensors And A Method Of Preparation Thereof..
Inventors include Seema Ansari; Muralidharan Malamal Neelanchery; Anitta Thomas; and Athira C. M..
The application for the patent was published on July 17, 2026, under issue no. 29/2026.
Abstract: The present invention discloses materials, designs and method of preparation for a commercially viable capacitive based relative humidity sensor having linear output with minimum hysteresis and temperature dependency. Capacitive humidity sensor comprising a water impermeable bottom electrode, preferably silver electrode on an insulating substrate, water permeable top electrode, preferably graphene-based electrode and water sensitive polymer, preferably polyimide, based dielectric material sandwiched between the electrodes. A printable ink composition of graphene based conductive ink is also disclosed which consist of graphene, one or more conductive additives such as activated carbon and/or metal powders, a dispersant, polymer binder and suitable solvent(s). Method of formation of an RH sensor using screen printing method is also disclosed. Fig. 1
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