Method for embedding a component in a base
View Patent ↗A method, in which the semiconductor components forming part of an electronic circuit, or at least some of them, are embedded in a base, such as a circuit board, during the manufacture of the base, when part of the base structure is, as it were, manufactured around the semiconductor components. Through-holes for the semiconductor components are made in the base, in such a way that the holes extend between the first and second surface of the base. After the making of the holes, a polymer film is spread over the second surface of the base structure, in such a way that the polymer film also covers the through-holes made for the semiconductor components from the side of the second surface of the base structure. Before the hardening, or after the partial hardening of the polymer film, the semiconductor components are placed in the holes made in the base, from the direction of the first surface of the base. The semiconductor components are pressed against the polymer film in such a way that they adhere to the polymer film.
1. A circuit board comprising
an insulating material layer having a first side and a second side,
at least one first conductive pattern layer on the first side of the insulating material layer, at least one of the first conductive pattern layers defining a first metal plate,
at least one second conductive pattern layer on the second side of the insulating material layer, at least one of the second conductive pattern layers defining a second metal plate,
a component inside the insulating material layer and between the first and second metal plates, the component having a first surface facing towards the second metal plate, and contact areas on the first surface,
a hardened insulating polymer layer between the first surface of the component and at least one conductive pattern of said at least one second conductive pattern layer, and
contact openings in the hardened insulating polymer layer and conductors in the contact openings for forming electrical contacts between the contact areas of the component and the at least one second conductive pattern layer or layers.
2. The circuit board of claim 1 , wherein the first and second metal plates are electrically connected to each other.
3. The circuit board of claim 1 , wherein the first and second metal plates are electrically connected to an earth connection of the circuit board.
4. The circuit board of claim 1 , wherein the component is located in a hole in the insulating material layer, and the circuit board comprises metal foil covering the sidewalls of the hole and a filler material in the hole between the metal foil and the component.
5. The circuit board of claim 4 , wherein the metal foil is electrically connected to at least one of the first and second metal plates.
6. The circuit board of claim 4 , wherein the metal foil is electronically connected to an earth connection of the circuit board.
7. The circuit board of claim 4 , wherein the component has a second surface opposite to the first surface and side-surfaces between the first and second surfaces, and wherein the first and second metal plates and the metal foil form an electromagnetic interference shield around the component such that
the side-surfaces of the component face towards the metal foil,
the first surface of the component face towards the second metal plate, and
the second surface of the component face towards the first metal plate.
8. The circuit board of claim 1 , wherein the insulating material layer includes a baseboard and the hardened insulating polymer layer.
9. The circuit board of claim 8 , wherein the baseboard is a glass-fibre reinforced epoxy board.
10. The circuit board of claim 8 , wherein the component is located in a hole in the baseboard; and the circuit board comprises conductive material on the sidewalls of the hole and a filler material in the hole between the metal foil and the component, wherein the metal foil creates an interference protection structure around the component.
11. The circuit board of claim 1 , wherein the conductors in the contact openings contain at least one of electrochemically deposited copper and chemically deposited copper.
12. The circuit board of claim 1 , wherein the hardened insulating polymer layer contains epoxy.
13. The circuit board of claim 1 , wherein the component is a microcircuit.
14. The circuit board of claim 1 , comprising an electrically conducting feed-through between the conductive pattern layers on the both sides of the insulating material layer.
15. A multi-layered circuit board comprising a first circuit board substructure and second circuit board substructure on top of each other, wherein at least the first circuit board substructure comprises
an insulating material layer having a first side and a second side,
at least one first conductive pattern layer on the first side of the insulating material layer, at least one of the conductive pattern layers defining a first metal plate,
at least one second conductive pattern layer on the second side of the insulating material layer, at least one of the second conductive pattern layers defining a second metal plate,
a component inside the insulating material layer and between the first and second metal plates, the component having a first surface facing towards the second metal plate, and contact areas on the first surface,
a hardened insulating polymer layer between the first surface of the component and at least one conductive pattern of said at least one second conductive pattern layer, and
contact openings in the hardened insulating polymer layer and conductors in the contact openings for forming electrical contacts between the contact areas of the component and the at least one second conductive pattern layer or layers.
16. The multi-layered circuit board of claim 15 , wherein said first circuit board substructure and said second circuit board substructure are electrically connected to each other to form a multi-layered functioning totality.
17. The multi-layered circuit board of claim 16 , wherein said second circuit board substructure comprises an insulating material layer and at least one conductive pattern layer in the insulating material layer.
18. The multi-layered circuit board of claim 17 , wherein said second circuit board substructure includes a component embedded in the insulating material layer.
19. The multi-layered circuit board of claim 15 , wherein said first circuit board substructure comprises a first microcircuit and said second circuit board substructure comprises a second microcircuit such that the first and second microcircuits are on top of each other and at least one of the first and second metal plates is located between said first and second microcircuits.
20. The multi-layered circuit board of claim 15 , wherein said second circuit board substructure comprises
an insulating material layer having a first side and a second side,
at least one first conductive pattern layer on the first side of the insulating material layer,
at least one second conductive pattern layer on the second side of the insulating material layer, at least one of the second conductive pattern layers defining a second metal plate,
a component inside the insulating material layer and having a first surface facing towards the second metal plate, and contact areas on the first surface,
a hardened insulating polymer layer between the first surface of the component and at least one conductive pattern of said at least one second conductive pattern layer, and
contact openings in the hardened insulating polymer layer and conductors in the contact openings for forming electrical contacts between the contact areas of the component and the at least one second conductive pattern layer or layers.
21. The multi-layered circuit board of claim 15 , wherein said second circuit board substructure comprises
an insulating material layer having a first side and a second side,
at least one first conductive pattern layer on the first side of the insulating material layer, at least one of the first conductive pattern layers defining a first metal plate,
at least one second conductive pattern layer on the second side of the insulating material layer,
a component inside the insulating material layer, the component having first surface and a second surface on the opposite sides of the component and contact areas on the first surface, the second surface facing towards the first metal plate,
a hardened insulating polymer layer between the first surface of the component and at least one conductive pattern of said at least one second conductive pattern layer, and
contact openings in the hardened insulating polymer layer and conductors in the contact openings for forming electrical contacts between the contact areas of the component and the at least one second conductive pattern layer or layers.
22. The multi-layered circuit board of claim 15 , comprising a third circuit board substructure on top of the first and second circuit board substructures.
23. The multi-layered circuit board of claim 22 , wherein the first circuit board substructure is between the second and third circuit board substructures.
24. The multi-layered circuit board of claim 22 , wherein each of the first, second and third circuit board substructures includes an embedded microcircuit.
25. The multi-layered circuit board of claim 15 , wherein the first and second metal plates are electronically connected to each other.
26. The multi-layered circuit board of claim 15 , wherein the first and second metal plates are electrically connected to each other.
27. The multi-layered circuit board of claim 15 , wherein the component is located in a hole in the insulating material layer, and the circuit board comprises metal foil covering the sidewalls of the hole and a filler material in the hole between the metal foil and the component.
28. The multi-layered circuit board of claim 15 , wherein the metal foil is electronically connected to at least one of the first and second metal plates.
29. The multi-layered circuit board of claim 15 , wherein the conductors in the contact openings contain at least one of electrochemically deposited copper and chemically deposited copper.
30. The multi-layered circuit board of claim 15 , wherein the component is a microcircuit.
31. The multi-layered circuit board of claim 15 , wherein the first circuit board substructure comprises at least two microcircuits inside the insulating material layer.
32. An electronic module comprising
an insulating material layer having a first side and a second side,
at least one first conductive pattern layer on the first side of the insulating material layer, at least one of the first conductive pattern layers defining a first metal plate,
at least one second conductive pattern layer on the second side of the insulating material layer, at least one of the second conductive pattern layers defining a second metal plate,
a hole having sidewalls defined in the insulating material layer and located between the first and second metal plates,
a metal foil covering the sidewalls of the hole,
a microcircuit inside the hole and having a first surface facing towards the second metal plate, and contact areas on the first surface,
a filler material in the hole between the metal foil and the microcircuit,
a hardened insulating polymer layer between the first surface of the microcircuit and at least one conductive pattern of said at least one second conductive pattern layer, and
contact openings in the hardened insulating polymer layer and conductors in the contact openings for forming electrical contacts between the contact areas of the microcircuit and the at least one second conductive pattern layer or layers.
33. The electronic module of claim 32 , wherein the first and second metal plates are electronically connected to each other.
34. The electronic module of claim 32 , wherein the first and second metal plates are electrically connected to an earth connection of the electronic module.
35. The electronic module of claim 32 , wherein the metal foil is electronically connected to at least one of the first and second metal plates.
36. The electronic module of claim 32 , wherein the metal foil and the first and second metal plates are electronically connected to an earth connection of the electronic module.