Device forming a pressure sensor, method for producing such a sensor and application in the production of a touch screen

摘要

A device forming a pressure sensor is provided. The device includes: a substrate made of electrical insulation material including a first reservoir, a second reservoir in communication with the first reservoir and of which two internal walls are each equipped with an electrode, and a flexible membrane made of an electrical insulation material, including a protuberance and secured to the substrate so as to enable movement of the protuberance between a position in which it is at a distance from a liquid filling the first reservoir and at least one second position in which it exerts a pressure on the liquid, thus discharging it at least partially from the first reservoir toward the second reservoir with mechanical contact with the two electrodes, the mechanical contact of the liquid with the electrodes establishing a resistance or capacitance between the electrodes. Application in the production of a touch screen is also provided.

主权项

1. A pressure sensor device comprising:
a substrate comprising an electrical insulation material, said substrate further comprising a first reservoir, a second reservoir in communication with the first reservoir and of which two internal walls are each equipped with an electrode; a flexible membrane comprising an electrical insulation material, said flexible membrane comprising a protuberance and secured to the substrate so as to enable movement of the protuberance between a position in which it is at a distance from a liquid filling the first reservoir and at least one second position in which it exerts a pressure on the liquid, thus discharging it at least partially from the first reservoir toward the second reservoir with mechanical contact with the two electrodes, said mechanical contact of the liquid with the two electrodes establishing a resistance or capacitance between the two electrodes.