Patent ID: 9190374
Filing Date: 2015-11-17
Classification: H01L

Abstract:
1. A fabrication method of a semiconductor chip with substrate via holes and metal bumps, comprising steps of: forming at least one electronic device on a front side of a substrate; forming at least one first metal layer on the front side of the substrate, wherein at least part of the at least one first metal layer is connected to at least one of the at least one electronic device; forming at least one metal bump on the at least one first metal layer; forming a protection film on the front side of the substrate to cover the front side of the substrate, the at least one electronic device, the at least one first metal layer, and the at least one metal bump; forming a demounting film on the protection film to cover the protection film; mounting an upper substrate on the demounting film; grinding and polishing the backside of the substrate; forming at least one substrate via hole on the backside of the substrate penetrating through the substrate by using photolithography and etching techniques; depositing at least one backside metal layer on the backside of the substrate to cover the inner surface of the at least one substrate via hole and at least part of the backside of the substrate and to connect the at least one first metal layer on the top at least one of the at least one substrate via hole; mounting a lower substrate to the backside of the substrate by using vacuum adsorption; demounting the upper substrate from the demounting film by heating; removing the demounting film and the protection film; and removing the lower substrate by releasing the vacuum adsorption.