Patent ID: 8252628
Filing Date: 2012-08-28
Classification: H01L

Abstract:
1. A method of manufacturing a semiconductor device, comprising the steps of: providing a semiconductor substrate which has oppositely facing first and second surfaces; forming an electronic element on the first surface that is an active surface of the semiconductor substrate and forming a pad electrode to be connected to the electronic element in a peripheral portion of the electronic element on the active surface; forming a first opening to extend from the second surface of the semiconductor substrate toward the pad electrode so as not to reach the first surface of the semiconductor substrate; forming a second opening having a diameter smaller than that of the first opening to reach the pad electrode from a bottom surface of the first opening; covering sidewall surfaces of the first opening and the second opening to form an insulating layer; and covering at least an inner wall surface of the insulating layer and a bottom surface of the second opening to form a conductive layer, wherein,