Abstract:
An integrated circuit package (210) comprising a substrate that has a dielectric layer and a micro-filled via formed substantially in the center of a hole in the dielectric layer is disclosed. The IC package substrate has at least one chip bonding pad and one ball attach pad (201) that are electrically coupled to each other by the micro-filled via. The micro-filled via is formed of a material called a "micro-filled via material" that includes a binding material and optionally includes a number of particles dispersed in the binding material. The binding material can be any material, such as a polymer that is either conductive or nonconductive. The particles can be formed of any conductive material, such as a conductive polymer or a conductive metal.
Abstract:
A structure (201) includes a support layer (210) formed of a conductive material, such as a sheet of copper. The support layer has a number of conductive islands (212A...) isolated from other portions of the support layer by isolation gaps (211a...). The support layer (210) is sandwiched between two compound layers (220, 230) each of which is formed of a dielectric layer having a number of via holes (221A..., 231A...) and conductive elements (222A..., 232...A) located in the via holes (221A..., 231A...). The conductive elements (222A..., 232A...) contact the conductive islands (212A...). The structure also includes two conductive layers, (240, 250) formed on the two compound layers (220, 230) such that a trace (241A...) in one of the conductive layers (240, 250) is coupled to a trace (241A) in the other conductive layer (240, 250) through two conductive elements and a conductive island. The support layer can be formed by etching a sheet of conductive materials. The compound layers can be formed by placing a conductive paste in via holes in a dielectric layer. The conductive layers can be formed by lamination followed by etching to form the traces.
Abstract:
A micro filled material (801) includes a binding material (802) and optionally includes a number of particles (803). The binding material (802) and the particles (803) can be formed of any conductive or nonconductive material. Using such a micro filled via material (801), an electrical conductor is formed in a substrate (825) for supporting one or more electronic components using the following steps: placing the micro filled via material (801) between two conductive layers (810, 820) at various locations in a substrate (825) at which an electrical conductor is to be formed; and optionally programming the micro filled via material (801) to reduce the resistance of, or to form an electrical conductor.