Z-connection for a microelectronic package using electroless plating

摘要

An assembly includes a substrate having a substrate conductor and a contact at a first surface and a terminal at a second surface for electrically interconnecting the assembly with a component external to the assembly, at least one of the substrate conductor or the contact electrically coupled with the terminal. A first element has a first surface facing the first surface of the substrate, a first conductor at the first surface and a second conductor at a second surface. An interconnect structure may extend through the first element electrically coupling the first and second conductors. An adhesive layer may bond first surfaces of the first element and the substrate, and at least portions of the first conductor and the substrate conductor may be beyond an edge of the adhesive layer. A continuous electroless plated metal region may extend between the first conductor and the substrate conductor.

主权项

1. A method of forming a substrate assembly, comprising:
assembling a first element and a substrate using an adhesive layer, wherein the substrate consists essentially of dielectric material, has a first surface, a second surface opposite the first surface, a substrate conductor and a contact at the first surface, and a terminal at the second surface for electrically interconnecting the assembly with a component external to the assembly, at least one of the substrate conductor or the contact being electrically connected with the terminal, the first element consists essentially of dielectric material, has a first surface facing the first surface of the substrate and a second surface opposite the first surface, a first conductor at the first surface, a second conductor at the second surface, and interconnect structure extending through the first element electrically connecting the first and second conductors, and the adhesive layer bonding the first surfaces of the first element and the first surface of the substrate with one another, such that at least portions of the first conductor and the substrate conductor are exposed beyond an edge of the adhesive layer; and connecting the first conductor and substrate conductor by electrolessly plating first and second metal regions onto the first conductor and the substrate conductor such that the first and second plated metal regions merge together during the plating to form a continuous electroless plated metal region extending between the first conductor and the substrate conductor and extending to a height above the first surface of the substrate, wherein the height is less than a height of the second surface of the first element above the first surface of the substrate.