The invention relates to a manufacturing process of a pixel array of a thermal pattern sensor comprising the steps of:providing a substrate；depositing a first layer of electrically conductive material, including depositing electrically conductive tracks, depositing of connector pins and depositing a ground strip；depositing of second layer of pyroelectric material covering the tracks and leaving at least part of the connector pins free；depositing of third layer of electrically conductive material；depositing of fourth layer of dielectric material in contact with the third layer；depositing of a fifth layer including electrically conductive heating tracks；depositing of a sixth protective layer,wherein the step of depositing the second and/or third and/or fourth and/or sixth layer is carried out by slot-die coating.
