公开(公告)号：US20230232612A1

公开(公告)日：2023-07-20

申请号：US18050179

申请日：2022-10-27

Applicant: Samsung Electronics Co., Ltd.

Inventor： Chanwoo Shin ,  Hyuckjin KANG ,  Donghwan LEE ,  Jeonil LEE ,  Minwu KIM ,  Jungwoo SONG

IPC: H01L29/94

CPC classification number: H01L27/10814 ,  H01L27/10885 ,  H01L27/10855

Abstract: A semiconductor device includes a bit line structure on a substrate, a lower contact plug on a portion of the substrate adjacent to the bit line structure, an upper contact plug including a first metal pattern on the lower contact plug and a second metal pattern contacting an upper surface and an upper sidewall of the first metal pattern, and a capacitor on the upper contact plug. The upper surface of the first metal pattern is above an upper surface of the bit line structure with respect to an upper surface of the substrate.

公开(公告)号：US20210335790A1

公开(公告)日：2021-10-28

申请号：US17371452

申请日：2021-07-09

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Jungwoo SONG ,  Kwangmin KIM ,  Jun Ho LEE ,  Hyuckjin KANG ,  Yong Kwan KIM ,  Sangyeon HAN ,  Seguen PARK

IPC: H01L27/108 ,  H01L29/06 ,  H01L23/532 ,  H01L27/24 ,  H01L27/22

Abstract: Provided are a semiconductor memory device and a method of fabricating the same. The semiconductor memory device may include: a first impurity doped region and a second impurity doped region spaced apart from each other in a semiconductor substrate, a bit line electrically connected to the first impurity doped region and crossing over the semiconductor substrate, a storage node contact electrically connected to the second impurity doped region, a first spacer and a second spacer disposed between the bit line and the storage node contact, and an air gap region disposed between the first spacer and the second spacer. The first spacer may cover a sidewall of the bit line, and the second spacer may be adjacent to the storage node contact. A top end of the first spacer may have a height higher than a height of a top end of the second spacer.