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:
Jan. 07, 2014
Filed:
Dec. 19, 2011
Applicant:
David Neil Casey, Ramsbottom, GB;
Inventor:
David Neil Casey, Ramsbottom, GB;
Assignee:
Diodes Incorporated, Plano, TX (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01L 21/22 (2006.01); H01L 21/38 (2006.01); H01L 21/331 (2006.01); H01L 29/66 (2006.01);
U.S. Cl.
CPC ...
Abstract
In one embodiment, a method includes forming a base region for a transistor using a base mask and forming a contact region to the base region. The contact region is formed in an area that is at least partially outside of the base mask. The method then forms an emitter region in a diffused base region. The base region diffuses outwardly to be formed under the contact region.