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:
Aug. 16, 2022
Filed:
Feb. 09, 2021
United Microelectronics Corp., Hsinchu, TW;
Tseng Hsun Liu, Taipei, TW;
Min-Hsuan Tsai, Tainan, TW;
Ke-Feng Lin, Taipei, TW;
Ming-Yen Liu, Hsinchu, TW;
Wen-Chung Chang, Hsinchu, TW;
Cherng-En Sun, New Taipei, TW;
UNITED MICROELECTRONICS CORP., Hsinchu, TW;
Abstract
A transistor structure includes a substrate, having a gate region and a first trench in the substate at a first side of the gate region. Further, a first gate insulating layer is disposed on a first portion of the gate region, opposite to the first trench. A second gate insulating layer is disposed on a second portion of the gate region and a first portion of the first trench abutting to the gate region, wherein the second gate insulating layer is thicker than the first gate insulating layer. A gate layer is disposed on the first and second gate insulating layers, having a downward protruding portion corresponding to the first trench. A first doped region is in the substrate at least under the first trench. A second doped region is in the substrate at a second side of the gate region.