Patent ID: 7897459
Filing Date: 2011-03-01
Classification: H01L

Abstract:
1. A method of manufacturing a semiconductor device having a through electrode, comprising: forming a trench for the through electrode in a semiconductor substrate; forming stacked insulating films on a top face of the semiconductor substrate and a side face of the trench; filling the trench with a conductor after forming the stacked insulating films; etching the conductor to form a recess so that a top face of the conductor is at a lower level than a top face of the stacked insulating films; removing a part of the stacked insulating films on the top face of the semiconductor substrate to expose an isolation region of the semiconductor substrate; removing a top portion of the conductor and the semiconductor substrate of the isolation region simultaneously; and forming a protective insulating film on the conductor which is remained in the trench after removing the top portion of the conductor.