Invention Grant
- Patent Title: Method of manufacturing multi-layer electrode for a capacitive pressure sensor and multi-layer electrodes formed therefrom
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Application No.: US16950547Application Date: 2020-11-17
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Publication No.: US11573102B2Publication Date: 2023-02-07
- Inventor: Stuart C. Salter , Pietro Buttolo , Paul Kenneth Dellock , Richard Gall , Jim Robert Chascsa
- Applicant: Ford Global Technologies, LLC
- Applicant Address: US MI Dearborn
- Assignee: Ford Global Technologies, LLC
- Current Assignee: Ford Global Technologies, LLC
- Current Assignee Address: US MI Dearborn
- Agency: Burris Law, PLLC
- Main IPC: G01D5/24
- IPC: G01D5/24 ; G01L9/00 ; C08L75/08 ; G01L9/12 ; C01B32/158

Abstract:
A multi-layer electrode of a capacitive pressure sensor is manufactured by roll to roll printing a conductive layer onto a polymer layer and forming a mutual capacitance sensor layer of the capacitive pressure sensor, co-extruding a conductive polymer layer and a foam dielectric layer and forming a coextruded layer of the capacitive pressure sensor, and pressure rolling the mutual capacitance sensor layer and the coextruded layer together and forming the multi-layer electrode. The conductive polymer layer includes between about 2 wt. % to about 15 wt. % graphene and between about 0.01 wt. % and 5 wt. % of the carbon nanotubes. Also, the conductive polymer layer has a flexural modulus equal to or greater than 5,000 MPa and an electrical resistivity less than or equal to 10 Ohm/mm3, and the polymer layer and/or the conductive polymer layer is formed from recycled polyethylene terephthalate.
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