Patent ID: 7208420
Filing Date: 2007-04-24
Classification: H01L

Abstract:
1. A method of forming a conductive connections for semiconductor devices, comprising: forming an organic low-k dielectric layer over a wafer; forming an electrically conductive aluminum containing layer over the organic low-k dielectric layer; placing the wafer in an etch chamber; providing an etch gas comprising HBr into the etch chamber, wherein the HBr has a flow rate, wherein the flow rate of the HBr is at least 80% of a total flow rate of the etch gas; forming a plasma from the etch gas comprising HBr; and using the plasma from the etch gas comprising HBr to selectively etch the electrically conductive aluminum containing layer with respect to the organic low-k dielectric layer to form electrically conductive connections from the electrically conductive aluminum containing layer.