Power module for an automobile
The invention relates to a power module ( 10 ), preferably for a vehicle, in particular an electric vehicle, characterized in that said module includes two vertically adjacent semiconducting chips ( 12, 14 ), each chip having a first surface ( 20, 22 ) to be connected to a heat sink substrate ( 24, 26 ), and a second surface ( 28, 30 ) separate from the first and on which at least one electronic component ( 38 a - 44 b ) is arranged, the module being arranged such that the second surfaces of the chips are arranged opposite one another.
1. A power module for an electric vehicle, the power module comprising:
two superposed semiconductor wafers, each wafer comprising a first face, configured to be connected to a heat dissipating substrate, and a second face, distinct from the first, on which at least one electronic component is arranged,
wherein the second faces of the two superposed semiconductor wafers are disposed facing each other,
wherein each of the two superposed semiconductor wafers comprises a frame that surrounds each corresponding superposed semiconductor wafer, the frame being molded onto each corresponding superposed semiconductor wafer, and
wherein the two semiconductor wafers are superposed by each frame forming a spacing support element, the spacing support element allowing the superposed arrangement of the two semiconductor wafers.
2. The power module as claimed in claim 1 , wherein the second face of each wafer comprises at least one connector, and wherein the module further comprises at least one connection element for connecting an electronic component or a connector of one of the wafers, to an electronic component or a connector of the other of the wafers.
3. The power module as claimed in claim 2 , in which at least one of the connection elements consists of a ribbon cable.
4. The power module as claimed in claim 3 , in which the ribbon cable is made to undulate to exhibit alternating opposing arches, at least one peak of a first type of arch being electrically connected to the second face of one of the wafers, and at least one peak of a second type of arch being electrically connected to the second face of the other of the wafers.
5. The power module as claimed in claim 1 , the module being configured such that the spacing support elements are in contact and that a space remains between the second faces of the two superposed semiconductor wafers.
6. The power module as claimed in claim 5 , in which the spacing support elements comprise mating surfaces with complementary shapes for locking the wafers in their relative positions.
7. A power module assembly comprising a power module as claimed in claim 1 and an assembly of two heat dissipating substrates, each of the heat dissipating substrates being respectively electrically connected to the first face of one of the wafers in direct contact with the first face of one of the wafers.
8. An assembly method for a power module comprising two semiconductor wafers, the assembly method comprising:
placing at least one electric component onto a connection face of each of the two semiconductor wafers, wherein the connection face of each wafer is one of two faces of each wafer, wherein each of the two semiconductor wafers comprises a frame that surrounds each corresponding superposed semiconductor wafer, the frame being molded onto each corresponding semiconductor wafer, and wherein each frame comprises a spacing support element; and
superposing the spacing support elements of the two semiconductor wafers so that the connection faces of each wafer are placed opposing each other.
9. The method as claimed in claim 8 , in which at least one connection element comprising a ribbon cable, is placed on the connection face of one of the two semiconductor wafers, and wherein the wafers are superposed in such a manner that the connection element electrically connects at least one connector of the connection face of the wafer or an electronic component arranged on the connection face, to a connector of the connection face of the other wafer or an electronic component arranged on the connection face of the other wafer.
10. A power module for an electric vehicle, the power module comprising:
two superposed semiconductor wafers, each wafer comprising a first face, configured to be connected to a heat dissipating substrate, and a second face, distinct from the first, on which at least one electronic component is arranged,
wherein the second faces of the two superposed semiconductor wafers are disposed facing each other,
wherein the second face of each wafer comprises at least one connector; and
at least one connection element installed on an inner portion of the connection faces for connecting an electronic component or a connector of one of the wafers to an electronic component or a connector of the other of the two wafers.
11. The power module as claimed in claim 10 , wherein the at least one of the connection elements comprises a ribbon cable.
12. The power module as claimed in claim 11 , wherein the ribbon cable is made to undulate so as to exhibit alternating opposing arches, at least one peak of a first type of arch is electrically connected to the second face of one of the two wafers, and at least one peak of a second type of arch is electrically connected to the second face of the other of the two wafers.
13. A power module for an electric vehicle, the power module comprising:
two superposed semiconductor wafers, each wafer comprising a first face, configured to be connected to a heat dissipating substrate, and a second face, distinct from the first, on which at least one electronic component is arranged,
wherein the second faces of the two superposed semiconductor wafers are disposed facing each other,
wherein at least one of the two wafers is formed by connectors organized in a plane and over molded by plastic material,
wherein the second face of each wafer comprises at least one of said connectors, and
wherein the module further comprises at least one connection element for connecting an electronic component or said at least one connector of one of the two wafers to an electronic component or said at least one connector of the other of the two wafers.
14. The power module as claimed in claim 13 , wherein the connection element is installed on the second faces for connecting an electronic component or said at least one connector of one of the two wafers to an electronic component or said at least one connector of the other of the two wafers.
15. The power module as claimed in claim 1 ,
wherein the spacing support elements of the two wafers comprise mating surfaces with complementary shapes for locking the wafers in their relative position, and
wherein the spacing support elements of the two wafers further mate with a surface of the wafer.
16. A power module assembly comprising a power module as claimed in claim 10 and an assembly of two heat dissipating substrates, each of the heat dissipating substrates being respectively electrically connected to the first face of one of the wafers in direct contact with the first face of one of the wafers.
17. A power module assembly comprising a power module as claimed in claim 13 and an assembly of two heat dissipating substrates, each of the heat dissipating substrates being respectively electrically connected to the first face of one of the wafers in direct contact with the first face of one of the wafers.