US 12,484,254 B2
Integrated circuit structure with backside via rail
Huan-Chieh Su, Changhua County (TW); Li-Zhen Yu, New Taipei (TW); Chun-Yuan Chen, Hsinchu (TW); Cheng-Chi Chuang, New Taipei (TW); Shang-Wen Chang, Hsinchu County (TW); Yi-Hsun Chiu, Hsinchu County (TW); Pei-Yu Wang, Hsinchu (TW); Ching-Wei Tsai, Hsinchu (TW); and Chih-Hao Wang, Hsinchu County (TW)
Assigned to TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY, LTD., Hsinchu (TW)
Filed by TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY, LTD., Hsinchu (TW)
Filed on Jul. 28, 2023, as Appl. No. 18/361,705.
Application 18/361,705 is a continuation of application No. 17/884,425, filed on Aug. 9, 2022, granted, now 11,784,233.
Application 17/884,425 is a continuation of application No. 17/156,584, filed on Jan. 24, 2021, granted, now 11,450,751, issued on Sep. 20, 2022.
Claims priority of provisional application 63/040,897, filed on Jun. 18, 2020.
Prior Publication US 2023/0411485 A1, Dec. 21, 2023
Int. Cl. H10D 30/67 (2025.01); H10D 84/01 (2025.01); H10D 84/03 (2025.01); H10D 84/83 (2025.01)
CPC H10D 30/6737 (2025.01) [H10D 30/6729 (2025.01); H10D 30/6735 (2025.01); H10D 30/6743 (2025.01); H10D 84/013 (2025.01); H10D 84/0149 (2025.01); H10D 84/038 (2025.01); H10D 84/83 (2025.01)] 20 Claims
OG exemplary drawing
 
1. An integrated circuit (IC) structure comprising:
a first transistor comprising first source/drain regions and a first gate structure between the first source/drain regions;
first gate spacers spacing apart the first source/drain regions from the first gate structure from a plan view;
a second transistor comprising second source/drain regions and a second gate structure between the second source/drain regions;
second gate spacers spacing apart the second source/drain regions from the second gate structure from the plan view, the first gate spacers and the second gate spacers extending along a first direction from the plan view;
a backside metal line extending between the first transistor and the second transistor along a second direction from the plan view;
a first metal contact wrapping around a first one of the second source/drain regions and having a protrusion interfacing the backside metal line from a cross-sectional view; and
a silicide layer interfacing an entirety of a sidewall of the first one of the second source/drain regions.