Taiwan Semiconductor Manufacturing Comp. Ltd.

Li-Lin Su

Ching-Hua Hsieh

Shau-Lin Shue

Tai-I Yang

Cheng-Lin Huang

Shing-Chyang Pan

Yung-Hsu Wu

Hsien-Chang Wu

Hsueh Wen Tsau

Wei-Chen Chu

Huang-Ming Chen

Jing-Cheng Lin

Cheng-Chi Chuang

Ming-Han Lee

Hsien-Ming Lee

Hsiang-Wei Liu

Hsin-Ping Chen

Chao-Hsien Peng

Shih-Kang Fu

Mong-Song Liang

Shao-Lin Shue

Shin-Yi Yang

Examples of an integrated circuit with an interconnect structure and a method for forming the integrated circuit are provided herein. In some examples, the method includes receiving a workpiece having an interconnect structure that includes a first conductive feature, a second conductive feature disposed beside the first conductive feature, and an inter-level dielectric disposed between the first conductive feature and the second conductive feature. A conductive material of an etch stop layer is selectively deposited on the first conductive feature and on the second conductive feature without depositing the conductive material on the inter-level dielectric, and the inter-level dielectric is removed to form a gap between the first conductive feature and the second conductive feature.

Integrated circuit interconnect structures with air gaps

Photolithography overlay errors are a source of patterning defects, which contribute to low wafer yield. An interconnect formation process that employs a patterning photolithography/etch process with self-aligned interconnects is disclosed herein. The interconnection formation process, among other things, improves a photolithography overlay (OVL) margin since alignment is accomplished on a wider pattern. In addition, the patterning photolithography/etch process supports multi-metal gap fill and low-k dielectric formation with voids.

Multi-metal fill with self-aligned patterning and dielectric with voids

A device includes a conductive layer including a bottom portion, and a sidewall portion over the bottom portion, wherein the sidewall portion is connected to an end of the bottom portion. An aluminum-containing layer overlaps the bottom portion of the conductive layer, wherein a top surface of the aluminum-containing layer is substantially level with a top edge of the sidewall portion of the conductive layer. An aluminum oxide layer is overlying the aluminum-containing layer. A copper-containing region is over the aluminum oxide layer, and is spaced apart from the aluminum-containing layer by the aluminum oxide layer. The copper-containing region is electrically coupled to the aluminum-containing layer through the top edge of the sidewall portion of the conductive layer.

Copper contact plugs with barrier layers

In a method for manufacturing a semiconductor device, a dielectric layer is formed over a substrate. A first pattern and a second pattern are formed in the first interlayer dielectric layer. The first pattern has a width greater than a width of the second pattern. A first metal layer is formed in the first pattern and the second pattern. A second metal layer is formed in the first pattern. A planarization operation is performed on the first and second metal layers so that a first metal wiring by the first pattern and a second metal wiring by the second pattern are formed. A metal material of the first metal layer is different from a metal material of the second metal layer. The first metal wiring includes the first and second metal layers and the second metal wiring includes the first metal layer but does not include the second metal layer.

Semiconductor device and manufacturing method thereof

Structures and formation methods of a semiconductor device structure are provided. The semiconductor device structure includes a conductive feature in a first dielectric layer. The semiconductor device structure also includes an etching stop layer over the first dielectric layer and a second dielectric layer over the etching stop layer. The semiconductor device structure further includes a conductive via in the etching stop layer and the second dielectric layer. In addition, the semiconductor device structure includes a conductive line over the conductive via. The semiconductor device structure also includes a first barrier liner covering the bottom surface of the conductive line. The semiconductor device structure further includes a second barrier liner surrounding sidewalls of the conductive line and the conductive via. The conductive line and the conductive via are confined in the first barrier liner and the second barrier liner.

Structure and formation method of interconnection structure of semiconductor device

The present disclosure involves a method of fabricating a semiconductor device in a semiconductor technology node that is 5-nanometer or smaller. An opening is formed that extends through a plurality of layers over a substrate. A barrier layer is formed on surfaces of the opening. A liner layer is formed over the barrier layer in the opening. The barrier layer and the liner layer have different material compositions. The opening is filled with a non-copper metal material. The non-copper material is formed over the liner layer. In some embodiments, the non-copper metal material includes cobalt.

Trench liner for removing impurities in a non-copper trench

Growing community of inventors

Taichung County, Taiwan

Li-Lin Su