Abstract: Thermal pattern sensor comprising several pixels arranged on a substrate, each pixel including at least one pyroelectric capacitance formed by at least one portion of pyroelectric material arranged between at least one lower electrode and at least one upper electrode, with the lower electrode arranged between the substrate and the portion of pyroelectric material, and in which at least one protective dielectric layer is arranged between the portion of pyroelectric material and the upper electrode and comprises at least one of the following materials: fluoropolymer, self-assembled molecular monolayer, dielectric material soluble in a solvent orthogonal to the pyroelectric material.

Abstract: Method for manufacturing a device comprising a stack including a first layer comprising electrical conductors electrically insulated from each other, a second electrically conducting layer, a third layer of pyroelectric material, said third layer being arranged between the first layer and the second layer, said method comprising, a) producing said stack on a substrate, the material of the third layer not being pyroelectric at this stage, b) producing a polarisation layer made of epoxy glue in electrical contact with the electrical conductors in the first layer, c) applying polarisation voltage to said third layer such that its material becomes pyroelectric, d) exposing the polarisation layer in its second state by ultraviolet radiation so as to make it at least partly electrically insulating.

Abstract: A thermal pattern sensor including a plurality of pixels arranged on a substrate. Each pixel has a pyroelectric capacitance formed by at least one pyroelectric material portion arranged between a lower electrode and an upper electrode. The sensor has an abrasion-resistance coating, located on the side opposite the substrate and including pillars embedded in an abrasion-resistance layer, the pillars having a thermal conductivity strictly higher than that of the abrasion-resistance layer. A high thickness of the anti-abrasion protection coating can be achieved with a high rate of thermal transfer through the latter.

Abstract: Method for manufacturing a device comprising a stack including a first layer comprising electrical conductors electrically insulated from each other, a second electrically conducting layer, a third layer of pyroelectric material, said third layer being arranged between the first layer and the second layer, said method comprising, a) producing said stack on a substrate, the material of the third layer not being pyroelectric at this stage, b) producing a polarisation layer made of epoxy glue in electrical contact with the electrical conductors in the first layer, c) applying polarisation voltage to said third layer such that its material becomes pyroelectric, d) exposing the polarisation layer in its second state by ultraviolet radiation so as to make it at least partly electrically insulating.

Abstract: A thermal pattern sensor including a plurality of pixels arranged on a substrate. Each pixel has a pyroelectric capacitance formed by at least one pyroelectric material portion arranged between a lower electrode and an upper electrode. The sensor has an abrasion-resistance coating, located on the side opposite the substrate and including pillars embedded in an abrasion-resistance layer, the pillars having a thermal conductivity strictly higher than that of the abrasion-resistance layer. A high thickness of the anti-abrasion protection coating can be achieved with a high rate of thermal transfer through the latter.

Abstract: A method produces a matrix of pixels of a thermal sensor, suitable for passive addressing. The matrix of pixels includes a layer including a first series of electrically conducting strips, forming charge collection macro-electrodes; a layer including a pyroelectric material; and a layer including a second series of electrically conducting strips, forming heating strips. The method includes a step of transfer of one on the other of a first and a second elementary stack, the first elementary stack including the first series of strips, and the second elementary stack including the second series of strips. This method makes it possible to relax the manufacturing constraints of the series of strips.

Abstract: The invention relates to a heat pattern sensor comprising a matrix of pyroelectric capacitances. The heat pattern sensor further comprises an electromagnetic shielding stage, electrically conducting, situated between a stage including a pyroelectric material and a protective layer of the matrix of pixels. The electromagnetic shielding stage includes an insulating layer, and a plurality of pads distributed in the insulating layer, the pads having a thermal conductivity greater than that of the insulating layer. The invention makes it possible to obtain at one and the same time rapid heat transfers through the electromagnetic shielding stage, and low lateral heat transfers, from one pixel to the other of the sensor.

Abstract: Thermal pattern sensor comprising several pixels arranged on a substrate, each pixel including at least one pyroelectric capacitance formed by at least one portion of pyroelectric material arranged between at least one lower electrode and at least one upper electrode, with the lower electrode arranged between the substrate and the portion of pyroelectric material, and in which at least one protective dielectric layer is arranged between the portion of pyroelectric material and the upper electrode and comprises at least one of the following materials: fluoropolymer, self-assembled molecular monolayer, dielectric material soluble in a solvent orthogonal to the pyroelectric material.

Abstract: A method produces a matrix of pixels of a thermal sensor, suitable for passive addressing. The matrix of pixels includes a layer including a first series of electrically conducting strips, forming charge collection macro-electrodes; a layer including a pyroelectric material; and a layer including a second series of electrically conducting strips, forming heating strips. The method includes a step of transfer of one on the other of a first and a second elementary stack, the first elementary stack including the first series of strips, and the second elementary stack including the second series of strips. This method makes it possible to relax the manufacturing constraints of the series of strips.

Abstract: The invention concerns a method of flip-chip assembly between first (1) and second (2) components each comprising connection pads (11, 21) on one of the faces of same, referred to as assembly faces, which involves transferring the components onto each other via the assembly faces of same in such a way as to create electrical interconnections between the pads of the first and second components. The invention involves transforming the copper oxide into copper by UV annealing, very locally, in the gap between the components, at least around the areas adjacent to the connection pads. The method according to the invention can be used for any component that is transparent to UV rays, including for substrates made from a plastic material such as substrates made from PEN or PET. The invention also concerns the assembly of two components obtained by the method.

Abstract: The invention concerns a method of flip-chip assembly between first (1) and second (2) components each comprising connection pads (11, 21) on one of the faces of same, referred to as assembly faces, which involves transferring the components onto each other via the assembly faces of same in such a way as to create electrical interconnections between the pads of the first and second components. The invention involves transforming the copper oxide into copper by UV annealing, very locally, in the gap between the components, at least around the areas adjacent to the connection pads. The method according to the invention can be used for any component that is transparent to UV rays, including for substrates made from a plastic material such as substrates made from PEN or PET. The invention also concerns the assembly of two components obtained by the method.