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:
Dec. 30, 2025
Filed:
Sep. 28, 2022
Changxin Memory Technologies, Inc., Hefei, CN;
Yuanhao Gao, Hefei, CN;
CHANGXIN MEMORY TECHNOLOGIES, INC., Hefei, CN;
Abstract
A semiconductor structure and a method for preparing a semiconductor structure are provided. The method includes: a composite hard mask layer is formed on an etching layer, the composite hard mask layer including a hard mask layer and an etching stop layer surrounded by the hard mask layer; a first target pattern and a first redundant pattern are formed in the composite hard mask layer; a remaining part of the etching stop layer is removed to form a second target pattern and a second redundant pattern in the hard mask layer; etching is performed by using the second target pattern and the second redundant pattern as masks to form a target structure in the etching layer and to form a redundant structure in the hard mask layer; and a remaining part of the hard mask layer is removed.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile