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:
Jul. 01, 1986
Filed:
Nov. 09, 1984
Kazuyoshi Shinada, Yokohama, JP;
Masaki Sato, Yokohama, JP;
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Abstract
A method of producing a MOS transistor of LDD structure with p(n) type pockets. A doped oxide film in which impurities such as phosphorus and impurities such as arsenic are doped is formed on a semiconductor substrate, and a nitride film is formed in regions where p type pockets are formed on the both sides of a gate electrode. By implementing heat treatment in the atmosphere of oxygen, the portion below the nitride film is placed in the condition where it is equivalent when heat treated in the atmosphere of nitrogen whereby a p type impurity region and an n.sup.- type impurity region are formed. The region except for that below the nitride film is heat treated in the atmosphere of oxygen to form an n.sup.+ type impurity region. Further, with the gate electrode as a mask, n.sup.- type impurity region and p type impurity region are formed, thereafter selectively growing a film on the side walls of the gate electrode to form an n.sup.+ type impurity region with the gate electrode and the film as masks, thus producing a MOS transistor.