Invention Grant
US08835306B2 Methods for fabricating integrated circuits having embedded electrical interconnects 有权
具有嵌入式电气互连的集成电路的制造方法

Methods for fabricating integrated circuits having embedded electrical interconnects
Abstract:
A method for fabricating integrated circuits includes providing a substrate including a protecting layer over an oxide layer and etching a recess through the protecting layer and into the oxide layer. A barrier material is deposited over the substrate to form a barrier layer including a first region in the recess and a second region outside the recess. A conductive material is deposited over the barrier layer and forms an embedded electrical interconnect in the recess and an overburden region outside the recess. The overburden region of the conductive material is removed and a portion of the embedded electrical interconnect is recessed. Thereafter, the barrier layer is etched to remove the second region of the barrier layer and to recess a portion of the first region of the barrier layer. After etching the barrier layer, the protecting layer is removed from the oxide layer.
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