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:
Nov. 14, 2023
Filed:
Dec. 08, 2021
Winbond Electronics Corp., Taichung, TW;
Chien-Hsien Wu, Taichung, TW;
Chun-Hung Lin, Chaiyi, TW;
Kao-Tsair Tsai, Kaohsiung, TW;
Yao-Ting Tsai, Kaohsiung, TW;
WINBOND ELECTRONICS CORP., Taichung, TW;
Abstract
A method for manufacturing a non-volatile memory device is provided. The method includes forming a trench through a sacrificial layer and extending into a substrate, filling a first insulating material into the trench, and implanting a dopant in the first insulating material by an implantation process. Then, the first insulating material is partially removed to form a first recess between the sacrificial layers. The lowest point of the first recess is lower than the top surface of the substrate. The method includes filling a second insulating material in the first recess and removing the sacrificial layer to form a second recess adjacent to the second insulating material. The method includes forming a first polycrystalline silicon layer in the second recess, and sequentially forming a dielectric layer and a second polycrystalline silicon layer on the first polycrystalline silicon layer.