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:
Mar. 06, 2012
Filed:
Aug. 26, 2011
Joseph A. Yedinak, Mountaintop, PA (US);
Nathan L. Kraft, Pottsville, PA (US);
Christopher B. Kocon, Mountaintop, PA (US);
Richard Stokes, Shavertown, PA (US);
Joseph A. Yedinak, Mountaintop, PA (US);
Nathan L. Kraft, Pottsville, PA (US);
Christopher B. Kocon, Mountaintop, PA (US);
Richard Stokes, Shavertown, PA (US);
Fairchild Semiconductor Corporation, South Portland, ME (US);
Abstract
Methods of manufacturing power semiconductor devices include forming an epitaxial and dielectric layer, patterning and etching the dielectric layer, forming a first oxide layer, forming a first conductive layer on top of the first oxide layer, etching the first conductive layer away inside an active trench, forming a second oxide layer and second conductive layer. The second conductive layer does not extend completely over the first conductive layer in a first region outside of the active trench. The methods further include forming a third oxide layer over the second conductive layer, etching a first opening through the third oxide layer exposing the second conductive layer outside the active trench, etching a second opening through the second oxide layer outside the active trench in the first region exposing the first conductive layer but not the second conductive layer, and filling the first and second openings with conductive material.