US 12,306,054 B2
Touch surface functionalized by a combined force and proximity sensor
Fabrice Severac, Toulouse (FR); and Nicolas Dufopur, Vallegue (FR)
Assigned to NANOMADE LAB, Toulouse (FR)
Appl. No. 17/801,249
Filed by NANOMADE LAB, Toulouse (FR)
PCT Filed Mar. 1, 2021, PCT No. PCT/EP2021/055082
§ 371(c)(1), (2) Date Aug. 21, 2022,
PCT Pub. No. WO2021/170883, PCT Pub. Date Sep. 2, 2021.
Claims priority of application No. 2002055 (FR), filed on Feb. 28, 2020.
Prior Publication US 2022/0412820 A1, Dec. 29, 2022
Int. Cl. G01L 1/22 (2006.01); B60K 35/00 (2006.01); G01D 5/24 (2006.01); G06F 3/01 (2006.01); G06F 3/041 (2006.01); G06F 3/044 (2006.01); H03K 17/96 (2006.01); B60K 35/10 (2024.01); B60K 35/25 (2024.01)
CPC G01L 1/2293 (2013.01) [B60K 35/00 (2013.01); G01D 5/24 (2013.01); G06F 3/016 (2013.01); G06F 3/0414 (2013.01); G06F 3/04164 (2019.05); G06F 3/0447 (2019.05); H03K 17/962 (2013.01); B60K 35/10 (2024.01); B60K 35/25 (2024.01); B60K 2360/143 (2024.01); B60K 2360/1438 (2024.01); B60K 2360/332 (2024.01); B60K 2360/336 (2024.01); B60K 2360/34 (2024.01); G06F 2203/04105 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A touch surface comprising:
a carrier substrate comprising two opposite faces, a first face of the two opposite faces being exposed to a touch;
a second face of the two opposite faces which is opposite to the first face and comprising a combined sensor comprising:
a first insulating substrate;
a first layer comprising a force sensor comprising an assembly of conductive nanoparticles in colloidal suspension in an electrically insulating ligand, deposited on the first insulating substrate;
first conductive tracks deposited on the first insulating substrate and adapted to supply power and to collect information from the force sensor;
a first protective layer covering the force sensor;
a second layer superimposed on the first layer and comprising a second insulating substrate and second conductive tracks configured to make a capacitive sensor, deposited on the second insulating substrate;
third conductive tracks deposited on the second insulating substrate and adapted to supply power and to collect information from the capacitive sensor; and
a second protective layer covering the capacitive sensor.