Patent ID: 8513119
Filing Date: 2013-08-20
Classification: H01L

Abstract:
1. A method of forming a semiconductor device, the method comprising: providing a first semiconductor substrate, the first semiconductor substrate having a through via extending from a first side into the first semiconductor substrate, the through via being conductive; exposing, after the providing, the through via on a second side of the first semiconductor substrate; forming, after the exposing, a first isolation film along a top surface of the second side of the first semiconductor substrate such that the through via is exposed; forming, after the forming the first isolation film, a conductive element with tapered sidewalls on the through via, the conductive element being positioned on the top surface of the second side; forming a second isolation film on the first isolation film, the first isolation film and the second isolation film being formed of different materials, and wherein the second isolation film is formed on, and covers, at least a portion of a first side of the conductive element; and forming a contact barrier layer after forming the second isolation film, the contact barrier layer formed over at least a portion of a second side of the conductive element and a portion of the top surface of the conductive element.