Electrical assembly
An electrical device that is electrically and mechanically connectable to another electrical device includes a face equipped with contact pads. An adhesive layer is on the face equipped with the contact pads. The adhesive layer is composed of a substance with adhesive properties. A plurality of openings through the adhesive are layer over each contact pad, and small metal sticks which have been grown electrolessly or electrochemically are in the areas where the openings have been created to form a plurality of conductive paths over each contact pad, the volume of which is defined by the openings.
1. An electrical assembly, comprising: a first electrical device and a second electrical device, the first electrical device including a first face including a plurality of first contact pads and the second electrical device including a second face including a plurality of second contact pads, the plurality of first contact pads facing the plurality of second contact pads, the first electrical device and the second electrical device electrically connected to each other by means of a connection layer comprising a substance with adhesive properties, wherein said connection layer comprises a plurality of conductive paths over each contact pad formed by a plurality of openings that extend through the connection layer and in which metal sticks have been grown using electroless or electrochemistry, said metal sticks are configured to extended beyond a plane of the connection layer.
2. The electrical assembly according to claim 1 , wherein the connection layer comprises one of polyimides, photosensitive resins, and thermoplastics.
3. The electrical assembly according to claim 1 , wherein the metal sticks comprise at least one of nickel, palladium, and copper.
4. The electrical assembly according to claim 1 , wherein the plurality of conductive paths are perpendicular to the plurality of first and second contact pads.
5. The electrical assembly according to claim 1 , wherein the first electrical device includes a first passivation layer, the second electrical device includes a second passivation layer, the plurality of first contact pads are in the first passivation layer, the plurality of second contact pads are in the second passivation layer, and the connection layer is superimposed on the first and second passivation layers.
6. The electrical assembly according to claim 1 , wherein one of the first and second electrical devices includes media including an exit for a wiring cable connected to the first and second contact pads.
7. The electrical assembly according to claim 1 , wherein a diameter of the plurality of conductive paths is between 10 and 30μm.
8. The electrical assembly according to claim 1 , wherein the plurality of conductive paths have a vertical length higher than a vertical thickness of the substance of the connection layer.
9. The electrical assembly according to claim 1 , wherein the first electrical device includes a first plate, the second electrical device includes a second plate, and one of the first and second plates has a smaller thickness than the other of the first and second plates.
10. The electrical assembly according to claim 1 , wherein the connection layer comprises a plurality of layers.