The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 10, 2024
Filed:
Jun. 10, 2021
Semiconductor Manufacturing International (Shanghai) Corporation, Shanghai, CN;
Semiconductor Manufacturing International (Beijing) Corporation, Beijing, CN;
Jisong Jin, Shanghai, CN;
Abstract
Semiconductor structures and fabrication methods are provided. The method includes providing a to-be-etched layer having first regions, second regions and third regions; forming a first core layer on a first region; forming a first sidewall spacer on sidewalls of the first core layer; forming a sacrificial layer covering a portion of the first sidewall spacer on the to-be-etched layer, having a plurality of initial first openings and with a portion of the initial first opening exposing a portion of the first sidewall spacer on the second region; removing the portion of the first sidewall spacer exposed by the portion of the initial first opening to form a first opening; forming a second sidewall spacer in the first opening; and forming second openings in the sacrificial layer. The second openings expose one of or both a portion of the first sidewall spacer and a portion of the second sidewall spacer.