Invention Grant
- Patent Title: Methods for fabricating FinFETs having different fin numbers and corresponding FinFETs thereof
-
Application No.: US17366465Application Date: 2021-07-02
-
Publication No.: US11764112B2Publication Date: 2023-09-19
- Inventor: Jhon Jhy Liaw
- Applicant: Taiwan Semiconductor Manufacturing Co., Ltd.
- Applicant Address: TW Hsin-Chu
- Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING CO., LTD.
- Current Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING CO., LTD.
- Current Assignee Address: TW Hsinchu
- Agency: HAYNES AND BOONE, LLP
- The original application number of the division: US16395552 2019.04.26
- Main IPC: H01L21/8234
- IPC: H01L21/8234 ; H01L29/66 ; H01L21/306 ; H01L27/088 ; H01L21/311 ; H01L21/308 ; H01L27/092 ; H01L21/8238

Abstract:
Fin patterning methods disclosed herein achieve advantages of fin cut first techniques and fin cut last techniques while providing different numbers of fins in different IC regions. An exemplary method implements a spacer lithography technique that forms a fin pattern that includes a first fin line and a second fin line in a substrate. The first fin line and the second fin line have a first spacing in a first region corresponding with a single-fin FinFET and a second spacing in a second region corresponding with a multi-fin FinFET. The first spacing is greater than the second spacing, relaxing process margins during a fin cut last process, which partially removes a portion of the second line in the second region to form a dummy fin tip in the second region. Spacing between the dummy fin tip and the first fin in the second region is greater than the second spacing.
Public/Granted literature
- US20210407857A1 Methods for Fabricating FinFETs Having Different Fin Numbers and Corresponding FinFETs Thereof Public/Granted day:2021-12-30
Information query
IPC分类: