Module
Provided is a module which has a package-on-package structure including a redistribution layer and can be easily reduced in height. A module 1 includes an upper module including a substrate, a first component, and a sealing resin layer, and a lower module including an intermediate layer and a redistribution layer. The first component is connected to the redistribution layer with a columnar conductor interposed therebetween and provided in the intermediate layer, and both the first component and a second component are rewired by the redistribution layer. Since the intermediate layer is formed by using a frame-shaped substrate, the upper module and the lower module can be connected without necessarily a bump, so that it is possible to provide a module which has a fanout-type package-on-package structure and can be easily reduced in height.
1. A module comprising:
a substrate;
a first component mounted on one main surface of the substrate;
a sealing resin layer sealing the one main surface and the first component;
a second component mounted on another main surface of the substrate;
an intermediate layer provided on the other main surface of the substrate and having a plurality of columnar conductors; and
a redistribution layer laminated on a surface of the intermediate layer on an opposite side facing to the other main surface of the substrate,
wherein the first component is connected to the redistribution layer with the columnar conductor interposed between the first component and the redistribution layer,
the second component has an outer electrode on the redistribution layer side, the outer electrode being connected to the redistribution layer,
an entire upper surface of the second component is in direct contact with the another main surface of the substrate, and
a height of a side surface of the second component is same as the height of the columnar conductors.
2. The module according to claim 1 , wherein the intermediate layer includes a frame-shaped substrate having an inner peripheral surface provided to surround the second component, and a resin is filled in a cavity surrounded by the inner peripheral surface, the second component, the redistribution layer, and the other main surface of the substrate.
3. The module according to claim 2 ,
wherein the frame-shaped substrate and the cavity are rectangular when viewed from a direction perpendicular to the one main surface of the substrate, and
the frame-shaped substrate has, when viewed from the direction perpendicular to the one main surface of the substrate, a first groove extending from an outer peripheral surface of the frame-shaped substrate to the inner peripheral surface opposed to the outer peripheral surface and a second groove positioned on a same line as the first groove.
4. The module according to claim 3 , wherein a shield film is provided on the inner peripheral surface of the frame-shaped substrate.
5. The module according to claim 3 , wherein a wiring pattern connected to a ground potential is provided between the columnar conductors adjacent to each other.
6. The module according to claim 3 , wherein a recess is provided in the other main surface of the substrate, and the second component is arranged in the recess.
7. The module according to claim 3 , wherein the second component is fixed to the other main surface of the substrate by a metal member provided on the other main surface of the substrate of the second component.
8. The module according to claim 2 , wherein a shield film is provided on the inner peripheral surface of the frame-shaped substrate, and wherein the shield film is in direct contact with the redistribution layer, the another main surface of the substrate, and an entire upper surface of the second component.
9. The module according to claim 8 , wherein a wiring pattern connected to a ground potential is provided between the columnar conductors adjacent to each other.
10. The module according to claim 8 , wherein a recess is provided in the other main surface of the substrate, and the second component is arranged in the recess.
11. The module according to claim 8 , wherein the second component is fixed to the other main surface of the substrate by a metal member provided on the other main surface of the substrate of the second component.
12. The module according to claim 8 , wherein the shield film is a multilayer structure comprising an adhesive film that is in direct contact with the inner peripheral surface of the frame-shaped substrate, a conductive film laminated on the adhesive film, and a protective film laminated on the conductive film.
13. The module according to claim 8 , wherein the adhesive film comprises SUS, Ti, Cr, Ni, Ti, Al, or combinations thereof, the conductive film comprises Cu, Ag, Al, or combinations thereof, and the protective film comprises SUS, Ti, Cr, Ni, TiAl, or combinations thereof.
14. The module according to claim 2 ,
wherein the frame-shaped substrate and the cavity are rectangular when viewed from a direction perpendicular to the one main surface of the substrate, and
the frame-shaped substrate has, when viewed from the direction perpendicular to the one main surface of the substrate, a first groove extending from an outer peripheral surface of the frame-shaped substrate to the inner peripheral surface and a second groove extending from another outer peripheral surface to another inner peripheral surface, the first groove and the second groove are on a same line when viewed from the direction perpendicular to the one main surface of the substrate.
15. The module according to claim 2 , wherein a wiring pattern connected to a ground potential is provided between the columnar conductors adjacent to each other.
16. The module according to claim 2 , wherein a recess is provided in the other main surface of the substrate, and the second component is arranged in the recess.
17. The module according to claim 2 , wherein the second component is fixed to the other main surface of the substrate by a metal member provided on the other main surface of the substrate of the second component.
18. The module according to claim 1 , wherein a wiring pattern connected to a ground potential is provided between the columnar conductors adjacent to each other.
19. The module according to claim 18 , wherein a recess is provided in the other main surface of the substrate, and the second component is arranged in the recess.
20. The module according to claim 18 , wherein the second component is fixed to the other main surface of the substrate by a metal member provided on the other main surface of the substrate of the second component.
21. The module according to claim 1 , wherein a recess is provided in the other main surface of the substrate, and the second component is arranged in the recess.
22. The module according to claim 1 , wherein the second component is fixed to the other main surface of the substrate by a metal member provided on the other main surface of the substrate of the second component.