Substrate for integrated circuit devices including multi-layer glass core and methods of making the same
Disclosed are embodiments of a substrate for an integrated circuit (IC) device. The substrate includes a core comprised of two or more discrete glass layers that have been bonded together. A separate bonding layer may be disposed between adjacent glass layers to couple these layers together. The substrate may also include build-up structures on opposing sides of the multi-layer glass core, or perhaps on one side of the core. Electrically conductive terminals may be formed on both sides of the substrate, and an IC die may be coupled with the terminals on one side of the substrate. The terminals on the opposing side may be coupled with a next-level component, such as a circuit board. One or more conductors extend through the multi-layer glass core, and one or more of the conductors may be electrically coupled with the build-up structures disposed over the core. Other embodiments are described and claimed.
1. A substrate comprising:
a core including of a number of discrete amorphous solid glass layers, the core having a first surface and an opposing second surface;
a number of conductors extending through the core from the first surface to the second surface;
at least one dielectric layer and at least one metal layer disposed at the first surface of the core, wherein the at least one metal layer at the first surface is electrically coupled with at least one of the conductors;
at least one dielectric layer and a least one metal layer disposed at the second surface of the core, wherein the at least one metal layer at the second surface is electrically coupled with at least one of the conductors.
2. The substrate of claim 1 , wherein the number of discrete amorphous solid glass layers are coupled together by bonding layers, wherein one of the bonding layers is disposed between adjacent glass layers.
3. The substrate of claim 2 , wherein each of the bonding layers includes an adhesive.
4. The substrate of claim 2 , wherein each of the bonding layers comprises an organic material.
5. The substrate of claim 2 , wherein at least one of the bonding layers includes an electrical conductor.
6. The substrate of claim 1 , wherein each of the conductors comprises a hole formed in the core and an electrically conductive material disposed in the hole.
7. The substrate of claim 6 , wherein the electrically conductive material comprises a metal.
8. The substrate of claim 1 , wherein the at least one metal layer disposed at the first surface of the core is disposed directly adjacent the first surface, and wherein the at least one metal layer disposed at the second surface of the core is disposed directly adjacent the second surface.
9. The substrate of claim 1 , further comprising:
a first set of terminals disposed on at the first side of the core, the first set of terminals to mate with a corresponding array of terminals on an integrated circuit (IC) die;
a second set of terminals disposed at the second side of the core, the second set of terminals to mate with a corresponding array of terminals on a next-level component.