Taiwan Semiconductor Manufacturing Comp. Ltd.

Chun-Li Wu

Tsung-Han Tsai

Ching-Hung Kao

Po-Jen Wang

A method for forming a semiconductor device structure is provided. The method includes forming a first semiconductor layer, an insulating layer and a second semiconductor layer in a substrate. The method also includes forming a first isolation feature in the first semiconductor layer, the insulating layer and the second semiconductor layer. The method further includes forming a transistor in and over the substrate adjacent to the first isolation feature. In addition, the method includes etching the first isolation feature to form a trench extending below the insulating layer. The method also includes filling the trench with a metal material to form a second isolation feature in the first isolation feature.

Method for forming semiconductor device structure with isolation feature

Structures and formation methods of a semiconductor device structure are provided. The semiconductor device structure includes a substrate. The substrate includes a first semiconductor layer, a second semiconductor layer, and an insulating layer between the first semiconductor layer and the second semiconductor layer. The semiconductor device structure also includes a gate stack over the substrate. The semiconductor device structure further includes source and drain structures in the second semiconductor layer of the substrate. The source and drain structures are on opposite sides of the gate stack. In addition, the semiconductor device structure includes a first isolation feature in the substrate. The first isolation feature includes an insulation material and surrounds the source and drain structures. The semiconductor device structure also includes a second isolation feature in the first isolation feature. The second isolation feature includes a metal material and surrounds the source and drain structures.

Growing community of inventors

Tainan, Taiwan

Chun-Li Wu