公开(公告)号：US09773699B2

公开(公告)日：2017-09-26

申请号：US15000302

申请日：2016-01-19

Applicant: Samsung Electronics Co., Ltd.

Inventor： Jong-Jin Lee ,  Rak-Hwan Kim ,  Byung-Hee Kim ,  Jin-Nam Kim ,  Tsukasa Matsuda ,  Wan-Soo Park ,  Nae-In Lee ,  Jae-Won Chang ,  Eun-Ji Jung ,  Jeong-Ok Cha ,  Jae-Won Hwang ,  Jung-Ha Hwang

IPC: H01L21/76 ,  H01L21/768 ,  H01L23/522 ,  H01L23/528 ,  H01L23/532

CPC classification number: H01L21/76882 ,  H01L21/76807 ,  H01L21/76843 ,  H01L21/76864 ,  H01L21/76877 ,  H01L23/522 ,  H01L23/5226 ,  H01L23/5283 ,  H01L23/53238

Abstract: In a method of forming a wiring structure, a lower structure is formed on a substrate. An insulating interlayer is formed on the lower structure. The insulating interlayer is partially removed to form at least one via hole and a dummy via hole. An upper portion of the insulating interlayer is partially removed to form a trench connecting the via hole and the dummy via hole. A first metal layer filling the via hole and the dummy via hole is formed. A second metal layer filling the trench is formed on the first metal layer.