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:
Apr. 25, 2023
Filed:
Jun. 08, 2020
Shanghai Huali Integrated Circuit Corporation, Shanghai, CN;
Yenchan Chiu, Shanghai, CN;
Yingju Chen, Shanghai, CN;
Liyao Liu, Shanghai, CN;
Chanyuan Hu, Shanghai, CN;
Shanghai Huali Integrated Circuit Corporation, Shanghai, CN;
Abstract
The present disclosure discloses a FinFET transistor cut etching process method, comprising: step 1, forming a first photoresist pattern to define a cut etching region of the FinFET transistor; step 2, forming a second amorphous semiconductor pattern; step 3, forming a first dielectric layer and a first groove; step 4, forming a second dielectric layer that fully fills the first groove; step 5, performing CMP using the second amorphous semiconductor layer as a stop layer, so as to form a sidewall and a second dielectric layer strip; step 6, performing self-alignment to remove each side wall; step 7, performing a wet process to remove the amorphous semiconductor strip; and step 8: performing etching by using each second dielectric layer strip as a mask, so as to form a fin and achieve cut etching of the FinFET transistor. The present disclosure can enlarge the process window and reduce the process cost.