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 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 invention relates to the collective fabrication of n 3D modules. It comprises a step of fabricating a batch of n wafers I on one and the same plate, this step being repeated K times, then a step of stacking the K plates, a step of forming plated-through holes in the thickness of the stack, these holes being intended for connecting the slices together, and then a step of cutting the stack in order to obtain the n 3D modules.The plate 10, which comprises silicon, is covered on one face 11 with an electrically insulating layer forming the insulating substrate. This face has grooves 20 that define n geometrical features, which are provided with an electronic component 1 connected to electrical connection pads 2′ placed on said face.After the stacking operation, holes are drilled perpendicular to the faces of the plates vertically in line with the grooves. The size of the holes is smaller than that of the grooves so that the silicon of each wafer 10 is isolated from the wall of the hole by resin.
Abstract:
In a method for the interconnection of stacked packages, each of the packages encapsulating, for example, a semiconductor chip containing an integrated circuit, a memory for example, the packages provided with pins are mounted on a printed circuit board. The printed circuit boards are stacked and fixedly joined with one another by means of a coating, for example a resin coating. The stack is sliced through so as to form bars, the pins of the packages being electrically connected to the side surfaces of the bars by means of the tracks of the printed circuit boards. The connection of the packages to one another is done on the side faces of the bars. The bars are then sliced through to obtain unit blocks of stacked packages.
Abstract:
A housing more particularly intended for encapsulating a wafer scale electronic circuit, realized in hybrid technology or integrated on semi-conducting substrate. In this housing:supply voltages are brought to different points disposed over the surface of the circuitlead-in circuits are constituted by conducting planes, placed in superimposed layers in the cover or the base of the housing.
Abstract:
A composite substrate, electrically insulating and with high heat conduction, for semiconductor circuits housing. It comprises principally an electrically insulating material such as alumina, in the form of a honeycombed wafer with cells, and a heat conducting material placed in said cells, such as a metal.
Abstract:
The invention relates to microboxes for encapsulating electronic circuits.Electronic circuits frequently comprise decoupling capacitors or the like, which occupy a large amount of space compared with the integrated parts of the box. The invention provides for the use of the bottom or substrate of the encapsulating box as capacitors after metallizing the two faces. The dielectric material is matched to the desired capacitance values. The microbox substrate is formed by a multilayer capacitor for high values.
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:
The invention relates to the collective fabrication of n 3D modules. A batch of n wafers I are fabricated on one and the same plate. This step is repeated K times. The K plates are stacked. Plated-through holes are formed in the thickness of the stack. These holes are intended for connecting the slices together. The stack is cut in order to obtain the n 3D modules. The plate 10, which comprises silicon, is covered on one face 11 with an electrically insulating layer forming the insulating substrate. This face has grooves 20 that define n geometrical features, which are provided with an electronic component 1 connected to electrical connection pads 2′ placed on said face.
Abstract:
A method for interconnecting active and passive components in two or three dimensions, and the resulting thin heterogeneous components. 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 the components, removing the support (14), redistributing the terminals (15) between the components and/or toward the periphery by metal conductors (26) arranged in a predetermined layout, making it possible to obtain a heterogeneous reconstituted structure, heterogeneously thinning (16) the structure by nonselective surface treatment of the polymer layer and at least one passive component (22).