Patent ID: 7928002
Filing Date: 2011-04-19
Classification: H01L

Abstract:
1. A method of forming a wiring layer of a semiconductor device, the method comprising: forming a first interlayer insulating layer to have a first thickness that corresponds to a part of the thickness of an interlayer insulating layer that is to be formed on a support layer; forming a first contact plug in the first interlayer insulating layer; forming a second interlayer insulating layer to have a second thickness on the first contact plug and the first interlayer insulating layer, thereby foaming the interlayer insulating layer, wherein the second thickness corresponds to the rest of the thickness of the interlayer insulating layer, and wherein the first thickness of the first interlayer insulating layer is half or less than half of the thickness of the interlayer insulating layer; and forming a second contact plug connected to the first contact plug in the second interlayer insulating layer, thereby forming a local wiring layer including the first contact plug and the second contact plug.