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. 05, 2002
Filed:
Mar. 24, 2000
Applicant:
Inventor:
Kuan-Lun Chang, Hsinchu, TW;
Assignee:
Industrial Technology Research Institute, Hsin-chu, TW;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L 2/120 ;
U.S. Cl.
CPC ...
H01L 2/120 ;
Abstract
A process for fabricating a bipolar junction transistor, featuring the use of multiple self-aligned collector regions, used to limit the width of the base region of the transistor, has been developed. The self-aligned collector regions are formed via multiple ion implantation procedures, performed through, and self-aligned to, an overlying emitter opening, in an oxide layer. The self-aligned collector regions, completely fill the space in the lighter doped collector region, located between the overlying base region, and the underlying subcollector region.