Stacked assembly of a MEMS integrated device having a reduced thickness

1. An assembly comprising:

a package that includes a base substrate having a main surface and a coating located on a portion of said main surface of said base substrate;

a first body including semiconductor material and integrating a micromechanical structure housed within said package on said main surface of said base substrate; and

a second body including semiconductor material and integrating at least one electronic component that is functionally coupled to said micromechanical structure, said first body and said second body being arranged within said package and stacked in a vertical direction that is transverse to said main surface of the base substrate, at least one of said first body and said base substrate having a first recess in which said second body is, at least in part, housed.

2. The assembly according to claim 1 , wherein said second body is housed completely within the first recess.

3. The assembly according to claim 2 , wherein:

at least one of said first body and said base substrate is bound by a respective main surface defining said first recess; and

said first recess provides an undercut at said respective main surface.

4. The assembly according to claim 1 , wherein said first body includes:

a first die integrating said micromechanical structure at a top surface and having a bottom surface coupled to the main surface of said base substrate that is opposite to an outer surface of said base substrate; and

a covering structure vertically stacked above said first die configured to cover said micromechanical structure, and having a bottom surface coupled to the top surface of said first die and a top surface opposite to said bottom surface.

5. The assembly according to claim 4 , wherein the top surface of said covering structure defines said first recess.

6. The assembly according to claim 5 , wherein:

said second body has a top surface at which said at least one electronic component is provided, and an opposite bottom surface; and

said top surface of said second body is coupled to a base of said recess, the assembly further including:

conductive elements located between contact pads on said top surface of said second body and conductive tracks on the base of said recess, on said top surface of said covering structure, and on an outer surface of said first body that is transverse to said main surface of said base substrate.

7. The assembly according to claim 6 , wherein the bottom surface of said second body defines an outer face of said package and faces an environment external to said package.

8. The assembly according to claim 4 , wherein the bottom surface of said first body includes said first recess that is located between said first die and said base substrate.

9. The assembly according to claim 8 , wherein:

said second body has a top surface that includes said at least one electronic component, and an opposite bottom surface;

said top surface of the second body being coupled to a base of said recess, the assembly further including:

conductive elements electrically connecting contact pads located on said respective top surface of said second body and conductive paths in said base substrate.

10. The assembly according to claim 8 , wherein:

said first recess is parallel to said main surface of the base substrate and extends as far as a lateral outer surface that forms a boundary of said first body; and

said second body extends laterally from said recess at said lateral outer surface.

11. The assembly according to claim 8 , wherein the main surface of said base substrate defines a second recess, facing, and in communication with, said first recess for jointly defining a housing for said second body.

12. The assembly according to claim 4 , wherein the main surface of said base substrate defines said first recess.

13. The assembly according to claim 1 , wherein said second body integrates a plurality of electronic components defining an electronic circuit configured to be functionally coupled to said micromechanical structure.

14. The assembly according to claim 1 , wherein said electronic component is one of an integrated capacitor and an integrated inductor.

15. The assembly according to claim 1 , further comprising a plurality of third bodies each including semiconductor material and integrating at least one second electronic component, each of the second electronic components being functionally coupled to said micromechanical structure; said third bodies being housed in said first recess.

16. The assembly according to claim 15 , wherein said first recess has a plurality of distinct recess portions separated from each other by walls, each recess portion configured to house a respective one of said first electronic components and second electronic components.

17. An electronic apparatus, comprising:

a base substrate having a first surface;

a first body including semiconductor material and integrating a micromechanical structure on a first surface, the first body located on the first surface of the base substrate;

a cap located over the first surface, at least one of said first body, said base substrate, and said cap having a recess;

a second body including semiconductor material and integrating at least one electronic component that is electrically coupled to said micromechanical structure, said second body being located in the recess, the second body being stacked in a direction that is transverse to the first surface of the base substrate;

a coating covering a portion of the first body, the second body, and the first surface of the base substrate; and

a printed circuit board electrically coupled to said base substrate.

18. The electronic apparatus according to claim 17 , wherein the recess is located in both an upper surface of the base substrate and a bottom surface of the first body.

19. The electronic apparatus according to claim 17 , wherein the recess is located in an upper surface of the cap.

20. The electronic apparatus according to claim 17 , wherein the recess is bounded by on one side in the first body and the second body extends beyond the first body.