Patent ID: 8759215
Filing Date: 2014-06-24
Classification: H01L

Abstract:
1. A method for manufacturing a solder bump for a through via in a substrate having a first surface and a second surface opposed to each other, the method including the acts of: forming a blind hole extending in the substrate from the first surface for the via; covering an internal surface of the blind hole with a dielectric layer; filling the blind hole with a conductive filler, a deepest part of the filler comprising a bump portion made of a solder material, the bump portion having a substantially constant thickness and a diameter of substantially the same size as a diameter of the blind hole; removing a part of the substrate extending from the second surface such that the only portion of the conductive filler protruding from the substrate is the bump portion, the non-protruding part of the conductive filler defining the corresponding via and the bump portion defining the corresponding bump; and selectively removing a portion of the dielectric layer to expose at least part of the bump portion, wherein the at least part of the bump portion includes a first bump surface of the bump portion substantially parallel to the second surface of the substrate and a second bump surface of the bump portion substantially perpendicular to the second surface of the substrate.