Abstract:
The invention relates to the collective fabrication of n 3D module. It comprises a step of fabricating a batch of n dies i at one and the same thin plane wafer (10) of thickness es comprising silicon, covered on one face with electrical connection pads (20), called test pads, and then with a thin electrically insulating layer (4) of thickness ei, forming the insulating substrate provided with at least one silicon electronic component (11) having connection pads (2) connected to the test pads (20) through the insulating layer. The components are encapsulated in an insulating resin (6) of thickness er, filling the spaces between the components, then separated from one another by first grooves (30) with a width L1 and a depth P1 such that ei+er
Abstract:
A power converter having a parallel resonant circuit, includes an inverter, a resonant circuit, a transformer comprising a primary circuit and a secondary circuit, control means for the inverter, the inverter being connected to the resonant circuit, which is intended to be connected to an output load via the transformer, the power converter wherein the inverter comprises a first half-bridge and a second half-bridge in parallel with the first half-bridge, a first inductor between the first half-bridge and the resonant circuit, a second inductor between the second half-bridge and the resonant circuit, and in that the first and second inductors have the same inductance and are coupled in the opposite direction to one another.
Abstract:
A process for manufacturing at least one 3D electronic module each comprises a stack of electronic packages and/or printed wiring boards, wherein a stack is placed on an electrically interconnecting system comprising metal leads each having two ends. The process comprises the following steps: starting with a lead frame that comprises metal leads, folding by about 180° the leads in order to obtain what is referred to as an internal frame portion including the folded ends, which are intended to be molded, the other portion, which is what is referred to as an external portion, including the unfolded exterior ends, the two ends of each lead being intended to emerge from the 3D module on a given face cut along Z; depositing on the leads a metal coating; placing the external portion of the frame between two, an upper and lower, protective elements while leaving the internal portion free, and placing the frame and the protective elements on a carrier; placing each stack equipped each with exterior interconnection tabs so as to superpose the exterior tabs on the internal portion; molding, in a resin, the stack, the exterior tabs and the internal portion and thereby partially covering the upper protective element; cutting the resin and thereby leaving flush conductive sections of the exterior tabs and of the ends of the leads and removing the resin from the upper protective element; metallizing the cut faces; removing the carrier; and removing the protective elements in order to expose the leads of the external portion.
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:
A process for fabricating a reconstituted wafer that includes chips having connection pads on a front side of the chip, this process including positioning of the chips on an adhesive support, front side down on the support; deposition of a resin on the support in order to encapsulate the chips; and curing of the resin. Before deposition of the resin, the process includes bonding, onto the chips, a support wafer for positioning the chips, this support wafer having parts placed on one side of the chips.
Abstract:
A process for the wafer-scale fabrication of CMS electronic modules starts from a wafer with metallized outputs, comprising electronic components molded in resin and, on one side, the external outputs of the electronic components on which a nonoxidizable metal or alloy is deposited, and of a printed circuit provided with oxidizable metal or alloy contact pads. In the process, the wafer is cut in predetermined patterns for obtaining reconfigured molded components that include at least one electronic component; the reconfigured components are assembled on the printed circuit, the metallized external outputs of the reconfigured components being placed opposite the metallized contact pads of the printed circuit; and these external outputs are connected solderlessly to the metallized contact pads of the printed circuit by means of a material based on an electrically conductive adhesive or ink.
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 invention relates to a method of interconnecting electronic components of a first wafer (T1) with electronic components of a second wafer (T2), each wafer having metallized vias (1) which pass through the wafer in the thickness direction. The method includes deposition of a drop (3) of conductive ink containing solvents on each via (1) of the first wafer (T1); stacking of the second wafer (T2) on the first so that the vias (1) of the second wafer (T2) are substantially superposed on the vias (1) of the first wafer (T1); removal of 50 to 90% of the solvents contained in the drops (3) by heating or applying a vacuum, so as to obtain a pasty ink; and laser sintering of the pasty ink drops (3) so as to produce electrical connections (31) between the superposed metallized vias (1).
Abstract:
A process for fabricating a reconstituted wafer that includes chips having connection pads on a front side side of the chip, this process including positioning of the chips on an adhesive support, front side down on the support; deposition of a resin on the support in order to encapsulate the chips; and curing of the resin. Before deposition of the resin, the process includes bonding, onto the chips, a support wafer for positioning the chips, this support wafer having parts placed on one side of the chips.
Abstract:
A process for the wafer-scale fabrication of CMS electronic modules starts from a wafer with metallized outputs, comprising electronic components molded in resin and, on one side, the external outputs of the electronic components on which a nonoxidizable metal or alloy is deposited, and of a printed circuit provided with oxidizable metal or alloy contact pads. In the process, the wafer is cut in predetermined patterns for obtaining reconfigured molded components that include at least one electronic component; the reconfigured components are assembled on the printed circuit, the metallized external outputs of the reconfigured components being placed opposite the metallized contact pads of the printed circuit; and these external outputs are connected solderlessly to the metallized contact pads of the printed circuit by means of a material based on an electrically conductive adhesive or ink.