Abstract:
A method for fabricating a re-built wafer which comprises chips having connection pads, comprising: fabricating a first wafer of chips, production on this wafer of a stack of at least one layer of redistribution of the pads of the chips on conductive tracks designed for the interconnection of the chips, this stack being designated the main RDL layer, cutting this wafer in order to obtain individual chips each furnished with their RDL layer, transferring the individual chips with their RDL layer to a sufficiently rigid support to remain flat during the following steps, which support is furnished with an adhesive layer, with the RDL layer on the adhesive layer, depositing a resin in order to encapsulate the chips, polymerizing the resin, removing the rigid support, depositing a single redistribution layer called a mini RDL in order to connect the conductive tracks of the main RDL layer up to interconnection contacts, through apertures made in the adhesive layer, the wafer comprising the polymerized resin, the chips with their RDL layer and the mini RDL being the re-built wafer.
Abstract:
The invention relates to a device for the hermetic encapsulation of a component that has to be protected from any stress. The component (5) is fastened to a substrate (15) that carries, on its other face, a temperature-regulating element (17) fastened by adhesive bonding (16). This assembly is placed in a package comprising two portions (11, 12) joined together by adhesive bonding (13) with a passage for optical links (6) and for electrical connections (18, 142). It is supported by protuberances (19) of one portion (11) of the package. Bonded to the other portion (12) is a three-dimensional interconnection block (14) forming the temperature-regulating electronics. The block, the package (11, 12) and a minimum length (L) of the links and connections are encapsulated in a mineral protective layer (4′). The invention applies especially to optoelectronic components and to MEMS components.
Abstract:
An electronic box having a capacitor in the form of a supporting plate bearing a component and covered by a cap. Additionally, the box includes a capacitor connected onto the supporting plate in such a way as to be situated between the component and the cap.
Abstract:
A casing for protecting electronic components or circuits against ionizing radiations, comprising an alternance of layers of materials having low and high atomic charge numbers, forming a multi-layer capacitor, and a base comprising an alternation of the same type.
Abstract:
An electrical heating resistor of the type deposited on a substrate plate constituting the basis element of a thermal printing head. In order to concentrate the heat given off in the free surface of said heating resistor towards the paper to print, the invention provides for the deposition on the substrate of at least one layer having a relatively constant resistivity and then at least one surface layer with a non-linear resistivity and a negative temperature coefficient. Starting from a high value when cold, the resistance of the surface layer drops abruptly as soon as it reaches the triggering temperature, thus switching the heat resistor by command of a control circuit.
Abstract:
A method for collectively fabricating a reconstituted wafer comprising chips exhibiting connection pads on a front face of the chip, comprises: positioning the chips on an initial adhesive support, front face on the support, vapor deposition at atmospheric pressure and ambient temperature, of an electrically insulating layer on the initial support and the chips, having a mechanical role of holding the chips, transfer of the chips covered with the mineral layer onto a provisional adhesive support, rear face of the chips toward this provisional adhesive support, removal of the initial adhesive support, overlaying the chips onto a support of “chuck” type, front faces of the chips toward this support, removal of the provisional adhesive support, deposition of a resin on the support of “chuck” type to encapsulate the chips, and then polymerization of the resin, removal of the support of “chuck” type, production of an RDL layer active face side.
Abstract:
The invention relates to a 3D electronic module comprising a stack (100) of at least a first slice (10) and a second slice (30), the first slice (10) having on a face (101) at least one set (4) of electrically conductive protrusions (41), and the second slice (30) comprising at least one zone (61) of electrically insulating material, traversing the thickness of the slice. The second slice (30) comprises at least one electrically conductive element (3) traversing said slice in a zone (61) of electrically insulating material, able to receive a set (4) of protrusions (41) of the first slice (10).
Abstract:
The present invention relates to an electronic device incorporating a heat distributor. It applies more particularly to devices of the plastic package type, with one or more levels of components. According to the invention, the electronic device, for example of the package type, is provided for its external connection with pads distributed over a connection surface. It includes a thermally conducting plate lying parallel to said connection surface and having a nonuniform structure making it possible, when the device is exposed to a given external temperature, to supply a controlled amount of heat to each external connection pad according to its position on the connection surface. If the device is a package comprising a support of the printed circuit type, the conducting plate will advantageously form an internal layer of said support.
Abstract:
The present invention relates to a method for the thin interconnection of active and passive components in two or three dimensions, and to the resulting thin heterogeneous components. According to the invention, the method comprises: positioning and fixing (11) at least one active component and one passive component on a flat support (23), the terminals being in contact with the support, depositing (12) a polymer layer (24) on all of the support and said components, removing the support (14), redistributing the terminals (15) between the components and/or toward the periphery by means of metal conductors (26) arranged in a predetermined layout, making it possible to obtain a heterogeneous reconstituted structure, heterogeneously thinning (16) said structure by nonselective surface treatment of the polymer layer and at least one passive component (22).
Abstract:
A method for the interconnection of stacked packages encapsulating, for example, a semiconductor chip containing an integrated circuit, for example a memory. Packages with connection pins (21) are stacked and fixedly joined to each other by means of a coating of resin for example. The pins of the packages are cut so as to be flush with the faces (31, 32) of the stack (3). The connection (C) of the packages with one another and their connection to connection pads (35) of the stack is done on the faces of the stack. The connection pads are, if necessary, provided with connection pins (36).