Stacked microelectronic packages having sidewall conductors and methods for the fabrication thereof
View Patent ↗Embodiments of a method for fabricating stacked microelectronic packages are provided, as are embodiments of stacked microelectronic packages. In one embodiment, the method includes producing a partially-completed stacked microelectronic package including a package body having a vertical package sidewall, a plurality microelectronic devices embedded within the package body, and package edge conductors electrically coupled to the plurality of microelectronic devices and extending to the vertical package sidewall. A flowable conductive material is applied on the vertical package sidewall and contacts the package edge conductors. Selected portions of the flowable conductive material are then removed to define, at least in part, electrically-isolated sidewall conductors electrically coupled to different ones of the package edge conductors.
1. A stacked microelectronic package, comprising:
first and second package layers bonded in a stacked relationship, each package layer comprising:
a molded package layer body;
a microelectronic device embedded within the molded package layer body; and
package edge conductors electrically coupled to the microelectronic device and extending to at least one sidewall of the package layer; and
a plurality of sidewall conductors electrically coupled to the package edge conductors and electrically interconnecting the microelectronic devices within the upper and lower package layers, the plurality of sidewall conductors composed of an electrically-conductive material deposited on sidewalls of the first and second package layers and having openings extending vertically therethrough electrically isolating adjacent ones of the sidewall conductors.
2. The stacked microelectronic package of claim 1 wherein the electrically-conductive material comprises a metal-containing epoxy.
3. The stacked microelectronic package of claim 1 further comprising a contact formation disposed over the first package layer and electrically coupled to at least one microelectronic device contained within the second package layer through at least one of the plurality of sidewall conductors.
4. The stacked microelectronic package of claim 1 wherein at least one of the first package layer and the second package layer comprises a redistributed chip panel package layer.
5. The stacked microelectronic package of claim 1 wherein the plurality of sidewall conductors have substantially linear shapes.
6. The stacked microelectronic package of claim 5 wherein the plurality of sidewall conductors are vertically oriented.
7. The stacked microelectronic package of claim 1 wherein the plurality of sidewall conductors interconnect different vertically-aligning pairs of the package edge conductors.
8. The stacked microelectronic package of claim 1 further comprises a dielectric material deposited onto sidewalls of the first and second package layers, the dielectric material filling the space between the plurality of sidewall conductors.
9. The stacked microelectronic package of claim 1 wherein the openings extend into the first and second package layers at locations between the plurality of sidewall conductors as viewed from a side of the stacked microelectronic package, and wherein the openings have concave geometries as viewed from a top-down perspective.
10. A stacked microelectronic package, comprising:
a plurality of package layers laminated together in a stacked formation to yield a stacked microelectronic package having a vertical sidewall, each package layer comprising:
a molded package layer body;
a microelectronic device embedded within the molded package layer body; and
package edge conductors extending from the microelectronic device to the vertical sidewall;
a plurality of sidewall conductors formed over the vertical package sidewall, the plurality of sidewall conductors composed of an electrically-conductive material applied on the vertical package sidewall, contacting the package edge conductors, and having vertical openings formed therein electrically isolating adjacent sidewall conductors.
11. The stacked microelectronic package of claim 10 wherein, for each package layer, the molded package layer body comprises a singulated piece of a larger molded panel.
12. The stacked microelectronic package of claim 10 wherein the vertical openings comprise at least one row of vertical openings drilled through the electrically-conductive material.
13. The stacked microelectronic package of claim 10 wherein the electrically-conductive material comprises an electrically-conductive paste.
14. The stacked microelectronic package of claim 10 wherein the vertical openings extend into the vertical sidewall of the stacked microelectronic package.
15. The stacked microelectronic package of claim 10 wherein the plurality of sidewall conductors each have substantially linear, elongated geometries.
16. The stacked microelectronic package of claim 15 wherein the plurality of sidewall conductors are each vertically oriented.
17. A stacked microelectronic package, comprising:
an upper package layer;
a lower package layer bonded to the upper package layer and cooperating therewith to define a vertical sidewall of the stacked microelectronic package;
a first plurality of package edge conductors in the upper package layer and extending to the vertical sidewall;
a second plurality of package edge conductors in the lower package layer and extending to the vertical sidewall;
electrically conductive circuit lines formed on the vertical sidewall composed of an electrically conductive adhesive through which vertical openings are formed to electrically isolate neighboring ones of the electrically conductive circuit lines, the electrically conductive circuit lines interconnecting the first plurality of package edge conductors with the second plurality of package edge conductors.
18. The stacked microelectronic package of claim 17 further comprising a dielectric material deposited onto the vertical sidewall and into the vertical openings.
19. The stacked microelectronic package of claim 17 wherein the vertical openings extend into the vertical sidewall.
20. The stacked microelectronic package of claim 17 wherein the vertical openings comprise at least one row of vertical openings drilled through the electrically conductive adhesive.