Abstract: Method for printing on a wafer (1) by screen-printing, characterized in that it comprises the following steps: producing at least two first test-patterns (5a-5d) on the surface (4) of the wafer (1); printing at least four second test-patterns (6a-6d), distinct from the at least two first test-patterns (5a-5d), during printing on the surface (4) of the wafer (1) by screen-printing; measuring the actual distance obtained on the surface (4) of the wafer (1) between the first test-patterns (5a-5d) and the second test-patterns (6a-6d); comparing this actual distance with a theoretical distance in order to deduce therefrom the offset of the screen-printing screen (25) of the printing.

Abstract: Display panel comprising two plates leaving between them a sealed space that is filled with a discharge gas and is partitioned into discharge cells bounded between these plates by barrier ribs made of a mineral material comprising a mineral binder based on a hydraulic binder, and a mineral filler. By using a hydraulic binder instead of a glassy mineral binder, the display panels may be manufactured at lower temperature.

Abstract: Method for producing doped regions on the rear face of a photovoltaic cell. A doping paste with a first type of conductivity is deposited on a rear face of a semiconductor-based substrate according to a pattern consistent with the desired distribution of regions doped with the first type of conductivity. Then, an oxide layer is deposited at least on the portions of the rear face of the substrate not covered with the doping paste. Finally, an annealing of the substrate diffuses the doping agents in the substrate and forms doped regions under the doping paste.

Abstract: A photovoltaic device which includes: a) a substrate based on a crystalline semi-conductor material; b) a first electrode which includes at least one heterojunction made on one face, referred to as the rear face, of the substrate, where this heterojunction includes a layer based on a doped amorphous semi-conductor material; and c) a second electrode. The first and second electrodes are arranged on the rear face of the substrate according to an interdigitated combs design, and where the layer includes multiple portions of the doped amorphous semi-conductor material which are unconnected and spaced apart from each other.

Abstract: An organic light-emitting diode comprising a substrate (1), an organic light-emitting layer (3) arranged between a first electrode (2) and a transparent and semi-reflecting second electrode with a multilayer structure subdivided into: a first silver-based metallic layer (4) in contact with the organic light-emitting layer (3), a second aluminum-based metallic layer (5), and a third dielectric layer (6), characterized in that the second metallic layer (5) is inserted between the first metallic layer (4) and the third dielectric layer (6) of the transparent second electrode, that the organic light-emitting layer (3) comprises a doped sub-layer in contact with the first metallic layer (4) of the transparent second electrode, and that the thickness of said third dielectric layer (6) is adjusted to limit the absorption by said first (4) and second (5) metallic layers of the light emitted by the diode.

Abstract: The encapsulation lid comprises at least two glass layers of different compositions, a first layer called the bottom layer, which is continuous, and at least a second layer, which is discontinuous and designed so as to define cavities or anfractuosities in this lid. Preferably, the glass layers other than the first layer are preferably formed from low-melting-point frits, thereby allowing such lids to be manufactured economically, without recourse to glass machining.

Abstract: The invention concerns an organic light-emitting diode comprising a lower electrode (2) and an upper electrode (8), an electroluminescent organic layer (5), and at least one doped organic layer (3; 7) in contact with one of said electrodes. The invention is characterized in that the doping is carried out using an alkaline-earth element or lanthanide, and the diode is heat-treated at temperature preferably not less than 60° C. for more than one hour. The invention enables the lighting performance of the diode to be considerably improved.

Abstract: Method for producing doped regions on the rear face of a photovoltaic cell. A doping paste with a first type of conductivity is deposited on a rear face of a semiconductor-based substrate according to a pattern consistent with the desired distribution of regions doped with the first type of conductivity. Then, an oxide layer is deposited at least on the portions of the rear face of the substrate not covered with the doping paste. Finally, an annealing of the substrate diffuses the doping agents in the substrate and forms doped regions under the doping paste.

Abstract: Tile comprising a substrate coated with at least one array of electrodes which is itself coated with an array of barrier ribs made of a mineral material, the porosity of which is greater than 25%, comprising a porous base underlayer which is inserted between the array of electrodes and the array of barrier ribs and which is made of a mineral material, the porosity of which is greater than 25%. Reinforced porous barrier ribs are obtained; advantageously, this tile does not include a specific dielectric layer; the number of manufacturing steps is limited and the tile can be manufactured entirely at low temperature.

Abstract: Display panel comprising two plates leaving between them a sealed space that is filled with a discharge gas and is partitioned into discharge cells bounded between these plates by barrier ribs made of a mineral material comprising a mineral binder based on a hydraulic binder, and a mineral filler. By using a hydraulic binder instead of a glassy mineral binder, the display panels may be manufactured at lower temperature.

Abstract: The encapsulation lid comprises at least two glass layers of different compositions, a first layer called the bottom layer, which is continuous, and at least a second layer, which is discontinuous and designed so as to define cavities or anfractuosities in this lid. Preferably, the glass layers other than the first layer are preferably formed from low-melting-point frits, thereby allowing such lids to be manufactured economically, without recourse to glass machining.

Abstract: Process comprising the following steps: a) deposition of a green layer based on 0.1% of an organic binder, on a mineral filler and on 0.1% to 13% of a mineral binder; b) formation of the barriers by spraying an abrasive material onto a mask applied against this layer, and then removal of the mask; c) deposition of a phosphor-based green layer; d) baking of the two layers, preferably simultaneously. By virtue of the limited amount of organic binder, the abrasion rate is high; if this content is at least 2%, deterioration of the green barriers is avoided.

Abstract: A plasma panel including two plates having a sealed space between them is disclosed. The sealed space is filled with discharge gas and is divided into discharge cells that are bounded between these plates by barrier ribs forming an array. The barrier rib portion that separates any two adjacent cells of the same column includes a cavity that is made in the thickness of that rib, and a notch that brings these two cells into communication with each other through the cavity. Such an arrangement makes it easier to apply the phosphors on the walls of the cells, while at the same time eliminating any risk of optical crosstalk.

Abstract: The present invention relates to a process for manufacturing a plasma panel tile, comprising the deposition of electrodes, using a paste comprising a metal powder and a mineral binder, and the baking of the deposited electrodes. According to the invention, the composition of the mineral binder and the baking conditions are tailored so that, after the deposited electrodes have been baked, the binder is in the recrystallized state. Owing to the recrystallized state of the binder, the yellowing problems which occur during subsequent heat treatments are eliminated.

Abstract: The invention relates to a method and device for etching a thin conductive layer which is disposed on an insulating plate such as to form an electrode network thereon. Before the etching takes place, a protective film, comprising patterns corresponding to the electrodes in the network, is applied, said film being removed after etching. The inventive etching method consists in: moving the plate in the general direction of the electrodes to be formed; circulating an electrochemical bath in a shear zone which is defined by the surface of the layer to be etched and by the surface of a counter electrode; and passing an electric current between the counter electrode and the zones which are not protected by the protective film, said current being conveyed over a line of contacts which is disposed on the surface of the conductive layer perpendicularly to the direction of passage D. In this way, etching homogeneity and network formation precision are improved.

Abstract: A plasma panel including two plates having a sealed space between them is disclosed. The sealed space is filled with discharge gas and is divided into discharge cells that are bounded between these plates by barrier ribs forming an array. The barrier rib portion that separates any two adjacent cells of the same column includes a cavity that is made in the thickness of that rib, and a notch that brings these two cells into communication with each other through the cavity. Such an arrangement makes it easier to apply the phosphors on the walls of the cells, while at the same time eliminating any risk of optical crosstalk.

Abstract: Tile comprising a substrate 10 coated with at least one array of electrodes 11 which is itself coated with an array of barrier ribs 17 made of a mineral material, the porosity of which is greater than 25%, comprising a porous base underlayer 18 which is inserted between the array of electrodes 11 and the array of barrier ribs 17 and which is made of a mineral material, the porosity of which is greater than 25%.

Abstract: Process comprising the following steps: a) deposition of a green layer based on 0.1% to 8% of an organic binder, on a mineral filler and on 0.1% to 13% of a mineral binder; b) formation of the barriers by spraying an abrasive material onto a mask applied against this layer, and then removal of the mask; c) deposition of a phosphor-based green layer, d) baking of the two layers, preferably simultaneously. By virtue of the limited amount of organic binder, the abrasion rate is high; if this content is at least 2%, deterioration of the green barriers is avoided.

Abstract: The present invention relates to a process for manufacturing a plasma panel tile, comprising the deposition of electrodes, using a paste comprising a metal powder and a mineral binder, and the baking of the deposited electrodes.

Abstract: A process for manufacturing insulating ceramic inserts used as sealed passages for electrical conductors through a metallic wall, is described wherein a green ceramic plate is subjected to silk-screen printing with the aid of a conducting ink, generally in ring-shaped patterns. The patterns are pressed and holes are pierced through the center of the ring and through at least one other green plate. The silk-screen printed plate is pressed against the at least one other green plate, or between two other green plates, bringing the holes into coincidence. A cut-out is made around each of the holes and the outer lateral surface of the part obtained is metallized. The part is then heat treated in order to fire and sinter same. It also is possible for the sintering to be performed before the metallization of the outer lateral surface.