Semiconductor device packaging having pre-encapsulation through via formation using drop-in signal conduits
View Patent ↗A semiconductor device package having pre-formed and placed through vias and a process for making such a package is provided. One or more signal conduits are placed in a holder that is subsequently embedded in an encapsulated semiconductor device package. The ends of the signal conduits are exposed and the signal conduits are then used as through package vias, providing signal-bearing pathways between interconnects or contacts on the bottom and top of the package. Holders can be provided in a variety of geometries and materials, depending upon the nature of the application. Further, multiple holders with signal conduits can be provided in a single package to provide for more complex interconnect configuration demands in, for example, system-in-a-package applications.
1. A method for packaging an electronic device assembly, the method comprising:
providing a conduit assembly comprising a holder and one or more signal conduits attached to the holder, wherein
the holder comprises a moldable, non-conductive material, and
the moldable, non-conductive material is one of a substrate core or a ceramic;
placing the conduit assembly in a first area of a carrier for the electronic device assembly, wherein the carrier is distinct from the holder;
placing a first electronic device in a second area of the carrier for the electronic device assembly;
forming an encapsulant over and around sides of the first electronic device and over and around sides of the conduit assembly; and
exposing a first end of a signal conduit of the one or more signal conduits and a second end of the signal conduit, wherein
the signal conduit forms a via through the encapsulated electronic device assembly, and
the signal conduit couples an interconnect formed on a first major surface of the encapsulated electronic device assembly with an interconnect formed on a second major surface of the encapsulated electronic device assembly.
2. The method of claim 1 wherein said exposing further comprises removing a portion of the encapsulant from the electronic device assembly.
3. The method of claim 2 wherein said removing further comprises one of:
grinding the encapsulant from the electronic device assembly to a depth matching the end of the signal conduit; and
laser ablating the encapsulant from the electronic device assembly to a depth matching the end of the signal conduit.
4. The method of claim 1 wherein said exposing further comprises performing said forming the encapsulant exposes the ends of conduit without removing a portion of the encapsulant.
5. The method of claim 1 further comprising:
providing a double-sided adhesive tape disposed on the carrier, wherein
said placing the conduit assembly comprises placing the conduit assembly on the tape with an end of each signal conduit in contact with the tape, and
said exposing comprises removing the tape from the encapsulated electronic device assembly.
6. The method of claim 1 , wherein
the one or more signal conduits are embedded in the holder; and
the first and second ends of the signal conduit are exposed.
7. The method of claim 1 wherein the conduit assembly comprises a conductive routing on one or both sides of the holder or inside the holder, wherein the conductive routing is coupled to one or more of the signal conduits.
8. The method of claim 1 further comprising:
providing a second conduit assembly comprising a second holder and second signal conduits attached to the second holder;
placing the second conduit assembly in a third area for the electronic device assembly;
forming the encapsulant over and around sides of the second conduit assembly; and
exposing first end of a second signal conduit of the second signal conduits and a second end of the second signal conduit, wherein
the second signal conduit forms a second via through the encapsulated electronic device assembly.
9. The method of claim 8 further comprising:
placing a second electronic device in a fourth area for the electronic device assembly; and
forming the encapsulant over and around sides of the second electronic device.
10. The method of claim 1 further comprising:
providing a frame or substrate in the first area for the electronic device assembly, wherein
said placing the conduit assembly comprises placing the first end of the signal conduit on the frame or substrate; and
attaching the first end of the signal conduit to the frame or substrate using a conductive bond.
11. The method of claim 1 further comprising:
coupling one of the first and second end of the signal conduit to an electrical contact of the first electronic device, wherein said coupling is performed using one of wire bond, flip chip bumping or other techniques.
12. A method for packaging an electronic device, the method comprising:
providing one or more signal conduits, wherein each signal conduit has a length equal to a thickness of an encapsulated region of the package;
attaching the one or more signal conduits to a holder to form a conduit assembly, wherein
the holder comprises a moldable, non-conductive material, and
the moldable, non-conductive material is one of a substrate core or a ceramic;
placing the conduit assembly in a first area of a carrier for the electronic device package, wherein the carrier is distinct from the holder;
placing a first electronic device in a second area of the carrier for the electronic device package;
forming an encapsulant over and around sides of the first electronic device and over and around sides of the conduit assembly;
exposing a first end of a signal conduit of the one or more signal conduits and a second end of the signal conduit, wherein
the signal conduit forms a via through the encapsulated electronic device assembly;
forming a first interconnect structure on a first major surface of the electronic device package, wherein the first interconnect structure is coupled to the first end of the signal conduit; and
forming a second interconnect structure on a second major surface of the electronic device package, wherein the second interconnect structure is coupled to the second end of the signal conduit.
13. The method of claim 12 wherein said attaching the one or more signal conduits to the holder comprises one of
molding the holder material around the one or more signal conduits, and
pressing the one or more signal conduits into the holder material.