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. 21, 2012
Filed:
Mar. 13, 2009
Kou-way Tu, Zhonghe, TW;
Kou-Way Tu, Zhonghe, TW;
Niko Semiconductor Co., Ltd., Taipei, TW;
Abstract
A power MOSFET is disclosed. In the power MOSFET, an epitaxial layer doped with dopants of a first conduction type is formed on a substrate. A first trench extends downward from a first region of the top surface of the epitaxial layer, and a second trench extends downward from the bottom of the first trench. The width of the second trench is smaller than that of the first trench. The first well is located adjacent to the bottom of the first trench and the bottom of the second trench, and is doped with dopants of a second conduction type. The second well extends downward from a second region of the top surface and is doped with dopants of the second conduction type. The first well and the second well are separated. A source region doped with dopants of the first conduction type is formed in the second well.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile