The invention concerns a piezoresistive force sensor (15),which is specially designed as a pressure sensor and can generate a sensor signal depending on the amount of force (F) exerting on the force sensor (15) in a force measurement direction (M). The force sensor (15) has a first electrode (20),a second electrode (21) and an elastically deformable resistance layer (17),which electrically connects the two electrodes (20,21). A resistance value (R) of a total resistance (35) of an electrically conductive path between the first electrode (20) over the resistance layer (17) to the second electrode (21),changes depending on the amount of force involved (F). Thus, for example, by measuring a voltage (U) between the electrodes (20, 21) or a current flowing along the electrically conductive path, a sensor signal can be detected describing the amount of the force (F). The resistance layer (17) contains electrically conductive first staple fibres (25) and electrically non-conductive second staple fibres (26). A proportion (A) of the first batch fibres (25) of the total batch fibres (25, 26) can be varied to adapt the force resistance characteristics of the force sensor (15) to the respective task.
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