公开(公告)号：US20150079780A1

公开(公告)日：2015-03-19

申请号：US14026634

申请日：2013-09-13

Applicant: United Microelectronics Corp.

Inventor： Yl-Liang Liu ,  Wu-Sian Sie ,  Po-Cheng Huang ,  Chih-Hsien Chen ,  I-Lun Hung ,  Yen-Ming Chen ,  Yu-Ting Li ,  Chang-Hung Kung ,  Chun-Hsiung Wang ,  Chia-Lin Hsu

IPC: H01L29/66

CPC classification number: H01L29/66545 ,  H01L21/823842 ,  H01L29/4966 ,  H01L29/6656 ,  H01L29/78

Abstract: A method of forming a semiconductor device is disclosed. A gate structure is formed on a substrate. The gate structure includes a dummy gate and a spacer at a sidewall of the dummy gate. A dielectric layer is formed on the substrate outside of the gate structure. A metal hard mask layer is formed to cover tops of the dielectric layer and the spacer and to expose a surface of the gate structure. The dummy gate is removed to form a gate trench. A low-resistivity metal layer is formed on the metal hard mask layer filling in the gate trench. The low-resistivity metal layer outside of the gate trench is removed. The metal hard mask layer is removed.

Abstract translation: 公开了一种形成半导体器件的方法。 在基板上形成栅极结构。 栅极结构包括在虚拟栅极的侧壁处的伪栅极和间隔物。 在栅极结构外部的基板上形成电介质层。 形成金属硬掩模层以覆盖电介质层和间隔物的顶部并露出栅极结构的表面。 去除伪栅极以形成栅极沟槽。 在填充在栅极沟槽中的金属硬掩模层上形成低电阻率金属层。 除去栅极沟槽外的低电阻率金属层。 去除金属硬掩模层。