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:
Oct. 07, 2014
Filed:
Mar. 29, 2012
Alfio Guarnera, Trecastagni, IT;
Mario Giuseppe Saggio, Acicastello, IT;
Ferruccio Frisina, Sant'Agata Li Battiati, IT;
Alfio Guarnera, Trecastagni, IT;
Mario Giuseppe Saggio, Acicastello, IT;
Ferruccio Frisina, Sant'Agata Li Battiati, IT;
STMicroelectronics S.R.L., Agrate Brianza (MB), IT;
Abstract
An embodiment of a process for manufacturing a power semiconductor device envisages the steps of: providing a body of semiconductor material having a top surface and having a first conductivity; forming columnar regions having a second type of conductivity within the body of semiconductor material, and surface extensions of the columnar regions above the top surface; and forming doped regions having the second type of conductivity, in the proximity of the top surface and in contact with the columnar regions. The doped regions are formed at least partially within the surface extensions of the columnar regions; the surface extensions and the doped regions have a non-planar surface pattern, in particular with a substantially V-shaped groove.