Abstract:
The hybridisation method involves: providing a first component 1 with first pads 3 for accommodating protrusions, providing a second component 2 with second pads 5 for accommodating protrusions, the first pads 3 and second pads 5 respectively being intended to line up two by two in order to form pairs of pads, then providing the first pads and/or second pads with protrusions 4 made of a fusible material, then placing the first and second components one on top of the other, then bringing the assembly consisting of the first and second components and consequently the solder protrusions to a soldering temperature in order to interconnect the first and second pads of each pair of pads by soldering the protrusions to these pads, and finally, cooling down the soldered joint thus obtained. Some of the protrusions 4 of fusible material fitted on the first and/or second pads 3 and 5 respectively consist of at least three larger-sized protrusions 6, especially taller protrusions, so that before the temperature is increased to the hybridisation temperature, the component only rests on the larger protrusions.
Abstract:
A process and a device for the passive alignment of supports, particularly plates which carry optical components. According to the invention, in order to align supports (2, 8), holes (6, 7, 11, 12) are formed in these supports, in correspondence with each other, balls (14, 16) are placed on the holes of one of the supports and these are assembled by placing the holes of the other support onto the balls. The sizes of the holes or of the balls are chosen so as to obtain a pre-set non-zero angle (α) between the assembled supports.
Abstract:
The device comprises several resonant cavities of different lengths, in order to emit over several different wavelengths, depending on the length of the corresponding cavity. Each resonant cavity comprises a convex cap, preferably hemispherical, of transparent material for the emitted wavelengths. The convex cap defines, at one end of the cavity, an excessive thickness, of length li, which enables to vary the length of the corresponding cavity. The caps are, preferably, obtained by remelting cakes of preset dimensions, for example of selenium, on the material forming the cavities.
Abstract:
A radiation detector which senses two wave bands and a process for making this detector. A first substrate includes a first photodetection element sensitive to a first wave band. A second substrate contains a second photodetection element which is sensitive to a second wave band. The second substrate is transparent to at least the first wave band. The two photodetection elements are positioned facing each other. The substrates are interconnected by conductive spheres.
Abstract:
An assembly of parts forming an angle between facing surfaces of the parts and a process for producing an assembly is described. The parts (2, 4) are provided with contact elements or pads (6, 8, 10, 12) for connection to one another by means of a relatively low melting point metallic soldering material. The surface of each of the pads is wettable by the low melting point metallic material in the molten state, while areas surrounding the pads are not wettable. The contact pads of one of the parts are covered with flat coils or wafers (10, 12) of the low melting point metallic material. The wafers have the same thickness, but different volumes. The contact pads of the other part are placed on the corresponding wafers. The wafers' thickness, volumes, and spacing are chosen so that when the wafers are heated to the molten state and form truncated spherical drops due to surface tension, the parts form between them a predetermined angle. The invention has particular application to the manufacture of mirrors.
Abstract:
The invention relates to a method for making a connection component that comprises a set of conducting inserts to be electrically connected with another component, said inserts being hollow.
Abstract:
The invention relates to a system and method for positioning and passively aligning at least one optical component as close as possible to an electromagnetic radiation detector. This system comprises supporting wedges (37) for Z positioning of the optical component (35) as close as possible to the detector (21) and passive X and Y alignment means via holding wedges and/or holding balls (36), the X, Y and Z axes being axes perpendicular to each other.
Abstract:
The invention relates to a method for producing a matrix of electronic components, comprising a step of producing an active layer on a substrate, and a step of individualizing the components by forming trenches in the active layer at least until the substrate emerges. The method comprises steps of depositing a layer of functional material on the active layer, depositing a photosensitive resin on the layer of material in such a way as to fill said trenches and to form a thin film on the upper face of the components, at least partially exposing the resin to radiation while underexposing the portion of resin in the trenches, developing the resin in such a way as to remove the properly exposed portion thereof, removing the functional material layer portion that shows through after the development step, and removing the remaining portion of resin.
Abstract:
The invention relates to a method for making a connection component that comprises a set of conducting inserts to be electrically connected with another component, said inserts being hollow.
Abstract:
The invention relates to an electronic device comprising: a circuit, comprising a first and a second face, the first face being provided with electrical connection means, a transfer element, comprising a first face and a second face, and being assembled to the second face of the active element through its first face, and comprising electrical connection means on its second face, a connection between the electrical connection means of the active element and the electrical connection means of the transfer element.